KR100320429B1 - Network expansion system - Google Patents

Abstract

The present invention relates to a network extension system, and more particularly, to a network extension system adapted to expand intelligent peripheral devices to the same signaling point in a common line signaling system. Such a network extension system includes a digital relay circuit that connects a public network for transmitting information such as voice or data, physically and electrically to the public network, and connects the voice and link channels of the public network to the first switching unit in the form of a PCM highway. And a first switching unit for switching the voice channel from the digital relay circuit unit to the intelligent peripheral unit, and a voice channel from the intelligent peripheral unit unit for the digital relay circuit unit, and serving a call input to itself. And a signal processing unit for distributing a call to the intelligent peripheral unit, processing signaling for any call input from the public network, determining the intelligent peripheral unit to service the input call, and distributing the call to the corresponding intelligent peripheral unit. A front end switching unit and a voice channel from the front end switching unit A second switching unit for switching to a processing unit, a voice processing unit for measuring the sound switched from the second switching unit in an arbitrary storage unit, and converting the data accumulated in the storage unit into a pulse code form, the signal processing unit; It is composed of a plurality of intelligent peripheral unit for local area communication (LAN), and a call processing unit for serving the input call of the signal processing unit to accumulate and manage the information transmitted from the public network.

Description

Network expansion system

The present invention relates to a network extension system, and more particularly, to a network extension system adapted to expand intelligent peripheral devices with the same signaling point in a common line signaling system.

Recent communication services are expected to be able to satisfy human needs and to dramatically improve the quality of life by overcoming the constraints of time and space with intelligence, imaging, personalization and multimedia functions.

This means that various services are converted into broadband communication services such as high-speed data, high-quality video, and high-definition television to meet user demands.

In order to provide better service, the exchange technology has been developed from simple voice call to provide various services, and establishing a communication network that can accommodate the same has been a challenge for each country.

A telecommunication network consists of terminals, transmission systems, and exchanges and is responsible for information transfer through dual path selection and access.

As the number of subscribers increases, the concept of a switching network has emerged in order to effectively and economically connect exchanges with each other, and the devices necessary to configure such a network are called exchange facilities (exchanges, transmission devices).

The concept of a network according to the increase of subscribers and the expansion of services is a broadband switch for providing complex services such as voice, data and video from a separate communication network configured for each purpose to a high-speed communication network that accommodates voice and data services. Based on this, the network of the 2000s will evolve into a high-speed integrated information network.

Intelligent Network is proposed to introduce various new services efficiently into existing communication networks.

In other words, the addition and modification of the services provided by the public switched telephone network (PSTN), public switched data network (PSDN), and integrated telecommunications network (ISDN) are performed by the upper computer, and the communication network for voice and data transmission and the transmission of such data are carried out. The controlling network can provide a more flexible service by dividing into separate layers.

Therefore, the intelligent network separates the signal layer and the intelligent layer required for service control from the communication network, thereby making the control and management of the service flexible.

The structure of the intelligent network is a public switched telephone network that actually transmits information such as voice and data, a transport layer including a public switched data network and a comprehensive information communication network, and an intelligent network generated at a signal layer and a transport layer for transmitting control signals between the transport layers. It consists of an intelligent layer that actually controls and manages the demand for services through the signal layer.

The intelligent network service can be implemented when the transport layer, the signal layer, and the intelligent layers operate in a comprehensive connection.

The transport layer transfers control signals to the subscriber call connection and exchange, and the higher signal layer exchange.

Signaling layer relays control and message of basic call signal and intelligent network service signal, and SIP (Service Transfer Point) is NO.7 signaling relay switch.

NO.7 signaling is a new common line signaling standardized by ITU-T (International Telecommunication Union-Telecommunication Standardization Sector) in 1980. Although it has a series of 4-6, it can be applied not only for telephone but also for data exchange (line switching), and is aiming at the future Integrated Information Communication Network (ISDN).

Applicable to international and domestic applications, the transmission speed of the signal link is based on 64 Kbps, equivalent to one channel of digital transmission speed (PCM) voice.

The intelligent layer controls and manages the services, and typically controls services such as data change and management, statistics and reporting, billing, and routing-related intelligent network database processing.

Hereinafter, a conventional intelligent network will be described with reference to the accompanying drawings.

1 is a block diagram illustrating a conventional NO.7 network and an intelligent peripheral device.

The conventional intelligent network is composed of a public network (1), which is a NO.7 network, and first to nth intelligent peripheral units (2a) ... (2n), which is a public network (1) and each intelligent peripheral unit (2). ) Is connected by a trunk.

FIG. 2 is a block diagram illustrating in detail the intelligent peripheral device as shown in FIG. 1.

In the conventional intelligent peripheral device, as shown in FIG. 2, the digital relay circuit 21 and the voice processor 23 are connected to the switching unit 22 by a pulse code modulation (PCM) highway (common communication channel). The processing unit 24a and the NO.7 signal processing unit 24b (or the call processing unit and the NO.7 signal processing unit 24) control the switching unit 22 via the data bus.

The call processing and NO.7 signal processing unit 24 and the voice processing unit 23 are connected by IPC (Inter Processor Communication) to transfer the call processing message to each other.

The digital relay circuit 21 is connected to the public network (see FIG. 1) through a trunk line.

At this time, the call processing unit 24a is a module for performing call processing of the intelligent peripheral unit 2 and the port of the voice processing unit 23 (VPM: Voice Process Module) for one input call. Allocate and perform recovery procedures and call recovery on call recovery.

The NO.7 signal processor 24 is a module that performs the public network 1 (NO.7) protocol as a signaling termination module (STM).

The voice processing section 23 is composed of a storage device for voice transmission and storage and a port allocated to one incoming call.

Each port stores voice data in the form of pulse code modulation (PCM), which is switched from a public network (NO.7 network) to a port through a digital relay circuit 21 (DTC: Digital Trunk Circuit) through a switch. It converts the file so that it can be stored in the form of a file and, on the contrary, converts the voice data in the form of a file into pulse code modulation and transmits it to the switch.

The switching unit 22 interconnects the digital relay circuit 21 channel and the voice processing unit 23 port occupied by the function of switching the PCM channel between the digital relay circuit 21 and the voice processing unit 23.

The digital relay circuit 21 makes a physical connection with the public network 1 through a trunk line and connects each trunk voice channel to a switch through a PCM highway.

32 channels exist in one trunk in time division multiplexing (TDM).

3 is a flowchart illustrating a call processing procedure of a conventional NO.7 network and an intelligent peripheral device.

In Fig. 3, when a call reception request from the public network is received by the intelligent peripheral unit 2, the protocol is performed by the NO.7 signal processing unit 24b to receive the call, and the call processing unit 24a is notified.

The call processor 24a allocates one port and sends a port occupancy request to the voice processor 23 through IPC.

The voice processing unit 23 occupies a port allocated by the call processing unit 24a, sends a port occupancy response to the call processing unit 24a via IPC, and the NO.7 signal processing unit 24b sends a response to the public network.

Thereafter, when voice recording or transmission ends between the public network 1 and the voice processing unit 23, a call recovery request comes from the public network 1, and the call processing unit 24a releases the assigned port and sends the port to the voice processing unit 23. Send a recovery request.

The voice processing section 23 recovers the port, sends a recovery response to the call processing section 24a, and the NO.7 signal processing section 24b sends a response to the call recovery request to the public network 1.

Such a conventional intelligent network has the following problems.

When adding intelligent peripherals to the public network, each intelligent peripheral needs a signal point. Generally, a single signaling point can accommodate 4000 channels. It has a capacity of about 250 to 1000 channels.

Therefore, each intelligent peripheral device must have a separate signal point when it is expanded to a capacity that can be accommodated as one signal point, which causes a waste of resources supporting the entire signal point.

An object of the present invention is to solve the problems of the conventional intelligent network as described above to provide a communication network expansion system that can connect a plurality of intelligent peripheral devices to the public network as one signal point in the public network.

According to an aspect of the present invention for achieving the above object, the public network for transmitting information such as voice or data, and the physical and electrical connection with the public network, and the voice and link channel of the public network in the form of PCM highway A digital relay circuit portion connected to the first switching portion, a voice channel from the digital relay circuit portion to the intelligent peripheral portion, and a first switching portion switching the voice channel from the intelligent peripheral portion to the digital relay circuit portion; And a signal processing unit for distributing a call to an intelligent peripheral unit to service a call inputted to the mobile station, processing the signaling for any call input from the public network, and determining the intelligent peripheral unit to service the input call. A front end switching unit for distributing a call to the intelligent peripheral unit, and a front end switching unit A second switching unit for receiving the voice channel of the data receiver and switching the voice processing unit, and a voice switched from the second switching unit to an arbitrary storage unit, and converting the data accumulated in the storage unit into a pulse code form. And a processing unit, a call processing unit which performs local information communication (LAN) with the signal processing unit, and services an input call of the signal processing unit, and comprises a plurality of intelligent peripheral units accumulating and managing information transmitted from the public network. Preferably, the front end switching unit and the plurality of intelligent peripheral units are connected to a local area information network (LAN) for service related message communication.

1 is a block diagram showing a conventional NO.7 network and intelligent peripheral devices

FIG. 2 is a block diagram illustrating details of an intelligent peripheral device as shown in FIG. 1.

3 is a flowchart illustrating a call processing procedure of a conventional NO.7 network and an intelligent peripheral device;

Figure 4 is a block diagram showing a communication network expansion system of the present invention

5 is a block diagram illustrating in detail the network extension system shown in FIG.

6 is a flowchart illustrating a call processing procedure of the present invention, the network expansion system.

* Description of the symbols for the main parts of the drawings *

30: public network 31: shear switching unit

32: intelligent peripheral unit

100: digital relay circuit unit 101: first switching unit

102. NO.7 signal processing unit 103: second switching unit

104: voice processing unit 105: call processing unit

Hereinafter, the configuration or operation according to the preferred embodiment of the present invention will be described with reference to the accompanying drawings.

Figure 4 is a block diagram showing a communication network expansion system of the present invention.

As shown in FIG. 4, the communication network expansion system of the present invention includes a public network 30 for transmitting information such as voice and data, and a plurality of intelligent peripheral units 32a for accumulating and managing information transmitted from the public network 30. (32n) and the intelligent peripheral unit 32a connected to the public network 30 to process a signal NO.7 for any call input from the public network 30 and to service the input call. (32n) It consists of the front end switching part 31 which determines and distributes a call to the intelligent peripheral part 32.

That is, the front end switching unit 31 is connected to the public network 30 through the trunk, and processes the NO.7 protocol. In addition, the intelligent peripheral unit 32 to be serviced for the incoming call is determined and the PCM highway channel is allocated to the intelligent peripheral unit 32.

Preferably, the front end switching unit 31 and the plurality of intelligent peripheral units 32a ... 32n are connected to a local area network (LAN) for service-related message communication.

The front end switching unit 31 is connected to the public network 30 via a trunk, and each intelligent peripheral unit 32a ... 32n is a front end switching unit 31 and an encoding (PCM). It is connected to the PCM highway to communicate the voice data.

In this case, when the intelligent peripheral unit 32 is expanded, the front end switching unit 31 serves as one signal point by connecting to the front end switching unit 31 instead of the public network 30.

FIG. 5 is a block diagram illustrating in detail a network expansion system as shown in FIG. 4.

5, the front end switching unit 31 physically and electrically connects the public network 30 and the front end switching unit 31, and the voice and NO of the public network 30. .7 a digital relay circuit portion 100 which connects a link channel to the first switching portion 101 in the form of a PCM highway, and a voice channel from the digital relay circuit portion 100 switches to the intelligent peripheral portion 32; And a first switching unit 101 for switching a voice channel from the intelligent peripheral unit 32 to the digital relay circuit unit 100 and a call to be serviced through a call input through the front end switching unit 31. N0.7 signal processing unit 102 to determine the intelligent peripheral unit 32.

At this time, the NO.7 signal processor 102 and the first switching unit 101 are interconnected by a NO.7 link and a data bus.

The intelligent peripheral unit 32 receives a voice channel from the front end switching unit 31 and switches from the second switching unit 103 to the voice processing unit 104 and the second switching unit 103. The voice processing unit 104 accumulates the switched voice in an arbitrary storage unit (not shown), converts the data stored in the storage unit into a pulse code modulation (PCM) form, and transmits the converted voice to the second switching unit 103. And a call processing unit 105 which performs local area communication (LAN) with the NO.7 signal processing unit 102 and provides a service for an input call of the NO.7 signal processing unit 102.

In this case, the second switching unit 103 is connected to the call processing unit 105 by a data bus, and the voice processing unit 104 and the call processing unit are connected by IPC (Inter Processor Communication).

In FIG. 5, the digital relay circuit unit 100 is physically and electrically connected to the public network 30 as a trunk. In addition, the voice and NO.7 link channel is connected to the first switching unit 101 in the form of a PCM highway.

The first switching unit 101 switches the voice channel of the input call to the second switching unit 103 of the intelligent peripheral unit 32 to service.

That is, the voice channel from the digital relay circuit unit 100 is switched to the second switching unit 103 and the voice channel from the intelligent peripheral unit unit 32 is switched to the digital relay circuit unit 100.

In addition, the NO.7 link between the NO.7 signal processor 102 and the digital relay circuit 100 is switched.

The NO.7 signal processing unit 102 controls the first switching unit 101 to switch the voice channel between the digital relay circuit unit 100 and the second switching unit 103.

In addition, the second switching unit 103 performs voice channel switching between the port of the first switching unit 101 and the voice processing unit 104.

The call processing unit 105 performs IPC communication with the NO.7 signal processing unit 102, the local information communication (LAN), and the voice processing unit 104, and performs the service for the input call.

In addition, the second switching unit 103 is controlled by the data bus so that the switching between the voice processing unit 104 port and the second switching unit 103 is performed.

The voice processing unit 104 is composed of an accumulator capable of accumulating voice in an arbitrary storage unit (for example, a disk (not shown)) and a plurality of service (message service) ports.

One port is allocated to one incoming call, and a call path between the voice channel and the port allocated to the incoming call is formed through the second switching unit 103.

The service port converts the PCM voice channel inputted into the port into a form that can be stored in an accumulator (disc), stores it on the disc, and converts voice data in the form of a file stored on the disc into a PCM voice channel. .

6 is a flowchart illustrating a call processing procedure of the network extension system of the present invention.

The call reception request of the user from the public network 30 is processed by the NO.7 protocol procedure in the NO.7 signal processing unit 102 and the intelligent peripheral unit 32 to perform the service is determined.

The NO.7 signal processing unit 102 transmits a port occupancy request message to the call processing unit 105 of the intelligent peripheral unit 32 via a local area information network (LAN), and the PCM channel of the intelligent peripheral unit 32 is transmitted. The switch is switched through the input PCM channel (digital relay circuit unit 100 channel) and the first switching unit 101.

The call processor 105 allocates one port and transmits a port occupancy request of the assigned port to the voice processor 104 through the IPC.

The voice processing unit 104 occupies one port and transmits an occupancy request response to the call processing unit 105, and the call processing unit 105 transmits an occupancy request response to the NO.7 signal processing unit 102.

The call processing unit 105 also performs local switching between the intelligent peripheral unit 32 channel and the port allocated at the time of switching the first switching unit 101 to establish a communication path between the digital relay circuit unit 100 and the port. Form.

After the NO.7 signal processor 102 transmits the response message to the public network 30, the user receives the voice transmission or storage service from the intelligent peripheral unit 32 and terminates the call. Then, the call recovery request message is transmitted from the public network 30. do.

When the call recovery request message is input to the NO.7 signal processing unit 102, the NO.7 signal processing unit 102 sends a port recovery request message to the call processing unit 105 and restores the first switching unit 101.

The call processing unit 105 sends a port recovery request message to the voice processing unit 104, sends a recovery response to the NO.7 signal processing unit 102 when a response is received, and restores the first switching unit 101.

The NO.7 signal processor 102 recovers the call by sending a response message to the public network 30.

In the network expansion system according to the present invention, the signal switching point can be efficiently used by allowing the intelligent switching unit to be connected to the public network by using the front end switching unit as one signal point.

Claims (2)

A public network for transmitting information such as voice and data; A digital relay circuit for physically and electrically connecting the public network and connecting the voice and link channels of the public network to the first switching unit in the form of a PCM highway, and the voice channel from the digital relay circuit unit to the intelligent peripheral unit; The voice channel from the intelligent peripheral unit is composed of a first switching unit for switching to the digital relay circuit unit and a signal processing unit for distributing a call to the intelligent peripheral unit to serve a call inputted to the digital relay circuit unit. A front end switching unit which processes signaling for any call to be made and determines the intelligent peripheral unit to service the input call and distributes the call to the intelligent peripheral unit; A second switching unit which receives the voice channel from the front end switching unit and switches the voice channel to the voice processing unit; and accumulates the voice switched from the second switching unit in an arbitrary storage unit, and stores the data stored in the storage unit in a pulse code form. And a voice processing unit for converting the information into a voice processing unit, and a call processing unit performing local area communication (LAN) with the signal processing unit and serving an input call of the signal processing unit, and accumulating and managing information transmitted from the public network. Communication network expansion system, characterized in that consisting of a peripheral device. The network extension system of claim 1, wherein the front end switching unit and the plurality of intelligent peripheral units are connected to a local area network (LAN) for service related message communication.