KR100336992B1 - Intelligent Peripheral System With Internal ATM Switch - Google Patents

Abstract

The present invention relates to an intelligent information providing system, and to provide an intelligent information providing system using an internal switch of an asynchronous transmission mode method to have a high reliability and network determinism, a local area network (LAN) matching board and Special resource processing means for providing a special resource to a service subscriber, the asynchronous transmission mode (ATM) matching board; Control means for responsible for signaling with an external system and controlling the special resource processing means; And connecting means for connecting an internal channel between the control means and the special resource processing means using an asynchronous transmission mode (ATM) switch, and used for a next generation intelligent network.

Description

Intelligent Peripheral System With Internal ATM Switch Using Asynchronous Transfer Mode Internal Switch

The present invention relates to an intelligent information providing system using an internal switch of the asynchronous transmission mode.

In general, Intelligent Peripheral (IP) (hereinafter, simply referred to as 'IP') is interworking with a service control system (SCP) and a service switching system (SSP) such as an automatic collect call service and a telephone voting service. Next-Generation Intelligent Network (AIN) provides special resources such as announcement, DTMF collection, voice recording, voice synthesis, voice recognition and fax transmission / reception to users who require next-generation intelligent network services (hereinafter simply referred to as 'AIN'). It is a component of this).

IP sets up a bearer channel for voice and data transmission and reception with the service control system (SSP) using the Integrated Service Digital Network User Part (ISUP) protocol (hereinafter simply referred to as 'ISUP'). It uses the Intelligent Network Application Protocol (INAP) (hereinafter, simply referred to as 'INAP') to send and receive operations for operating a special resource with a service control system (SCP).

User to Network Interface (UNI) with digital interface (hereinafter simply referred to as 'UNI') is the International Telecommunication Union (ITU) (hereinafter simply referred to as 'ITU') Q.931 Recommendation Network to Network Interface (NNI) (hereinafter simply referred to as NNI) is implemented based on the Q.763 Recommendation.

In general, the ISUP protocol is used as a signaling for establishing a call between an exchange system and an exchange system having a message transfer part (MTP) protocol (hereinafter simply referred to as an 'MTP') protocol, which is a No.7 sub-protocol.

However, the highly intelligent information system (IP) exists as a signal point (SP) on No. 7 network, and uses the service switching system (SSP) and the NNI protocol ISUP to establish call and special resources. To provide.

The IP receives the initial address message (IAM) from the service switching system (SSP) on the ISUP protocol, and then the ISUP and INAP processing units built in the control subsystem have a channel with the service switching system (SSP) and special resources within the IP. Channels are connected to each other to connect bearer channels.

However, in the existing IP system, the internal channel between the control subsystem and the special resource subsystem is configured through a local area network (LAN) switch.

Therefore, the sender was able to throw a message to the network with the best-effort and was unable to guarantee reliable communication due to the local area network (LAN) characteristic that no specific control was possible for the subsequent delivery. In addition, the next generation of intelligent network components are planned to be configured through an Asynchronous Transfer Mode (ATM) interface (hereinafter, simply referred to as 'ATM') interface. If the system is not configured, there are many problems in securing the reliability of the internal communication network and retaining the asynchronous transfer mode (ATM) matching function in the future.

That is, as the demand for the next generation intelligent network service increases, the capacity of the special resource channel provided by the IP system needs to be expanded, and the existing Transmission Control Protocol / Internet Protocol (TCP / IP) (hereinafter, simply referred to as' TCP / IP ') based local area network (LAN) (hereinafter, simply referred to as' LAN') communication method has a problem that the traffic quality (eg, call loss) can be degraded.

The present invention has been proposed to solve the above problems of the prior art, to provide an intelligent information providing system using an internal switch of the asynchronous transmission mode method to have a high reliability and network determination. There is this.

1 is a configuration diagram of an embodiment of a next-generation intelligent network to which the present invention is applied.

2 is a block diagram of an embodiment of an intelligent information providing system according to the present invention;

3 is an exemplary diagram illustrating a configuration of a channel information table for a special resource unit when an asynchronous transmission mode switch according to the present invention is configured as an internal switch.

4 is an exemplary view showing a call setup processing procedure using an integrated information communication network user part protocol and an intelligent network application protocol message when an initial address message is received from a service switching system in an intelligent information providing system according to the present invention.

Explanation of symbols on the main parts of the drawings

101: service control system (SCP) 102: service switching system (SSP)

103: Intelligent Information System (IP) 104: Signal Repeater (STP)

The present invention for achieving the above object, in the intelligent information providing system using the internal switch of the asynchronous transmission mode method applied to the next-generation intelligent network, a local area network (LAN) matching board and asynchronous transmission mode (ATM) matching board Special resource processing means for providing a special resource to a service subscriber; Control means for responsible for signaling with an external system and controlling the special resource processing means; And connecting means for connecting an internal channel between the control means and the special resource processing means using an asynchronous transfer mode (ATM) switch.

That is, the present invention, which constitutes a system having an ATM switch as an internal switching of IP, has many advantages in terms of securing reliability of an internal communication network and retaining ATM matching function in the future.

In addition, the present invention, using the ISUP protocol No.7 signaling protocol to switch the special resource channel through the ATM switch to the bearer channel in the IP system based on the ISUP protocol processing technology, bearer channel and IP between SSPs and IP Connect internal channels.

That is, the present invention is an intelligent peripheral (hereinafter referred to as 'IP') that plays a role of providing a special resource to subscribers of an intelligent network among components of an advanced intelligent network (hereinafter referred to as 'AIN'). In this configuration, a system using an Asynchronous Transfer Mode (ATM) switch (hereinafter simply referred to as an 'ATM') type of internal communication network is constructed, and traffic is handled under such a structure.

In the intelligent information providing system of the present invention, it is possible to ensure high speed and reliability for signal and data traffic processed on a communication network in the system by using an internal switch of an ATM method.

Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to FIGS. 1 to 4.

1 is a configuration diagram of an embodiment of a next-generation intelligent network to which the present invention is applied.

As shown in the figure, an Advanced Intelligent Network (AIN) (hereinafter, simply referred to as 'AIN') is a service control point (SCP) for creating and controlling a service (hereinafter, simply referred to as 'SCP'). '101', a service switching point (SSP) serving as an exchange role (hereinafter, simply referred to as 'SSP') 102, and an intelligent information providing system (IP: Intelligent) responsible for providing resources. Peripheral) (hereinafter simply referred to as 'IP') 103.

In addition, they are connected via a common line control signal network No. 7 (CCS No. 7: Common Control Signaling System No. 7) (hereinafter, simply referred to as 'CCS No. 7').

These components process INAP and ISUP messages through an existing Signaling Transfer Point (STP) (hereinafter, simply referred to as 'STP') 104 to handle traffic, and STP 104 generally handles traffic. It consists of a mesh, and each component is connected to the signal repeater through two or more links for reliability.

The IP 103 connects the SSP 102 and the bearer channel 106 to the E1 trunk, and communicates with the SCP 101 as an INAP protocol via a signaling link 105 connected to the STP 104. 102 provides call processing and service while exchanging signaling messages using ISUP protocol.

2 is a configuration diagram of an embodiment of an intelligent information providing system according to the present invention, which is an IP configuration in which an internal ATM switch is mounted.

The IP system includes a control subsystem 210, a special resource processing subsystem 220, a fast Ethernet switch 230, and an ATM switch 240.

Compared to the conventional IP system in which only the LAN switch 230 is mounted as the internal communication network, the IP system of the present invention is configured by adding the ATM switch 240 to the internal communication network.

The control subsystem 210 that is in charge of CCS No. 7 signaling and service control and processing of the IP system is again the service control unit 211, INAP protocol processing unit 213, ISUP protocol processing unit 212, No. 7 signal network platform 215, the switch control unit 214, the digital trunk matching unit 216, the ATM-digital trunk matching unit 217, the fast Ethernet matching board 218, and the ATM matching board 219.

The special resource processing subsystem 220, which substantially provides special resources to subscribers, is divided into sub-units for each function, and each sub-unit carries a LAN matching board 222 and an ATM matching board 223 in common. The voice guide / recording and DTMF collection / processing board 224, the voice recognition board 225, the voice synthesis board 226, and the fax processing board 227 are configured according to the respective functions.

Fast Ethernet switch 230 is implemented for inter-subsystem signaling 252, and ATM switch 240, which is the actual traffic transmission 253 path.

The signal message input through the signal link 250 is transmitted to the No. 7 signal network platform 215 through the digital trunk matching unit 216. In the No.7 signal network platform 215, the message input from the SSP is transmitted to the service control unit 211 through the ISUP protocol processing unit 214, and the message input from the SCP through the INAP protocol processing unit 213. Traffic processing is performed.

The function of switching the bearer channel 251 and the special resource channel 253 through the ATM-digital trunk matching board 217 using the parameter information of the ISUP and INAP signaling messages is required. This function is called an IP call processing function.

The service control unit 211 of the control subsystem 210 controls the devices in the system and drives special resources 224 through 227 for the IP call processing function.

The service control unit 211 undergoes an operation analysis process to determine what resources need to be provided from the message input from the SCP, and it is determined whether the special resources are driven according to the intelligent network service.

In addition, by providing a resource to a subscriber via a bearer channel by driving a special resource in the IP, at this time, in selecting a special resource board that needs to be driven, it is checked whether it is currently available and through an internal channel through the switch controller 214. Will be connected.

In this case, the service controller 211 should control the state of the current IP internal channel, and manages internal channel information through a table.

3 is a diagram illustrating a configuration of a channel information table for each special resource unit when an asynchronous transmission mode switch according to the present invention is configured as an internal switch. FIG. 3 illustrates a normal scenario between SSP, SCP, and IP when a user requests an intelligent network service. Yes.

SCP instructs the bearer channel connection between the SSP and IP to recognize the intelligent network service request and to provide special resources to the user according to the service logic. The SSP sends an Initial Address Message (IAM) (hereinafter, simply referred to as 'IAM') in which a Called Party Address is an IP address to connect a bearer channel.

The IAM message is delivered to the IP through a signaling route of the common line signaling network. IP sends an AddressComplete Message (ACM) (hereinafter simply referred to as 'ACM') to the SSP according to the ISUP call processing procedure and requests the SCP for special resources to be delivered to the user.

SCP instructs the operation of special resources in the IP according to the service logic, and IP sends the response message (ANM) (hereinafter simply referred to as 'ANM') according to the ISUP call processing procedure and drives the indicated special resource. do.

After interfacing with the user through special resources, notify the SCP of the results as needed. SCP may continue to instruct special resources to run and release bearer channel between SSP and IP. The release procedure follows the ISUP call processing procedure.

Looking at the bearer link capacity of the control subsystem 210, one E1 link of the digital trunk matching unit 216 is composed of 32 channels of PCM scheme with a transmission rate of 64 Kbps. That is, one E1 has a speed of 2,048 Kbps (2.048 Mbps). On the other hand, one port of the ATM matching board 219 has a transmission rate of 155 Mbps or 622 Mbps, which is a transmission capacity corresponding to 77.5 E1 links.

The IP-SSP call path capacity is currently composed of 32 E1 links, which are 64Mbps in speed. One ATM 155Mbps link is enough to accommodate it.

Meanwhile, the channel specification of the special resource processing subsystem 220 is fixedly connected to the ATM switch 240 in a PVC manner by a UNI method, which is a standard ATM interface. Special resource units can be equipped with up to eight E1 boards per unit, which can require transfer rates of up to 16 Mbps, with 240 channels with 64 kbps.

One E1 consists of 32 channels. In general, channel 0 is frame sync and channel 16 is a channel for signaling and is not used as a channel. As a result, assigning one 155 Mbps interface port to one unit is enough to handle the busy hour traffic.

The service control unit 211 uses the information of the IAM message received from the SSP to connect the channel between the SSP and the internal ATM switch channel. Generic Flow Control (GFC) field defined in the ATM User-Network Interface (UNI) field (hereinafter simply referred to as 'GFC') field. The internal ATM switch channel uses a fixedly assigned Virtual Path Identifire (VPI) (hereinafter simply referred to as' VPI ') / Virtual Cannel Identifier (VCI) (hereafter simply' VCI '), which is input as a parameter of the ATM cell header part. The ATM switch has this value and the channel is established as the channel is connected to the channel of the special resource unit.

2 ⁸ (256) VPIs and 2 ¹⁶ (65536) VCIs can be allocated.

In the IP system devised in the present invention, only a part thereof is allocated and used. There is a fixed virtual channel (PVC) (hereinafter simply referred to as 'PVC') and a switched virtual channel (SVC) (hereinafter referred to as 'SVC') service method for ATM switching. Considering the ease of control, using the PVC method is considered an appropriate method.

In the IP system having the above specification, the VPI value is assigned to 0 for voice announcement / voice recording and DTMF collection board 301, 1 for voice recognition board 302, 2 for voice synthesis board 303, and fax processing. 3 is fixedly assigned to the board 304 (305), and the VCI value is assigned according to a channel assignment scheme that is determined separately.

At the same time, IDLE and BUSY status are recorded because the status of each channel must be managed. The channel information table may be managed while there is a switch controller 214 or a separate maintenance processor.

4 is an exemplary view illustrating a call setup processing procedure using an integrated information communication network user part protocol and an intelligent network application protocol message when an initial address message is received from a service switching system in an intelligent information providing system according to the present invention. Call processing block diagram showing how to set up a call using the ISUP protocol in the control subsystem when an IAM is received from the SSP.

The ISUP protocol processor 431 of the IP transmits the initial address message IAM received from the SSP 410 to the service controller 433 via the INAP protocol processor 432 using the IAM_ind and Conn_ind messages.

The service controller checks whether the resource is available and again transmits Conn_resp, ARI_req, and ARI_need messages to the INAP protocol processing units 432 and 434. The INAP protocol processor 434 transmits a response message IAM_resp to the IAM message to the ISUP protocol processor 431, and the ISUP protocol processor checks the connection of the bearer channel with the SSP through the address completion message ACM.

Meanwhile, for INAP signaling with the SCP, TC_BEG and TC_INV messages in the form of TCAP messages are transmitted to the No.7 signal network platform 435. The No.7 signaling network platform will request additional information to SCP 420 through an Assist Request Instruction (ARI) message (hereinafter simply referred to as 'ARI').

After receiving an ARI message, SCP receives operations such as Voice Announcement (PA) (hereinafter referred to simply as "PA") and Voice Recording (PRM) and "Prompt and Recording Message (hereinafter referred to as" PRM "). IP is indicated by IP, and IP analyzes the indicated operation and starts to provide the special resource through bearer channel connected with SSP.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the technical field of the present invention without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

As described above, the present invention has an ATM switch as an internal communication network of an IP system, which is a next generation intelligent network element, thereby improving reliability than LAN communication based on existing TCP / IP. In other words, by using an ATM switch that guarantees reliability as an internal communication network, there is an excellent effect to expect an improvement in service quality.

In addition, the present invention has an excellent effect of quickly coping with an ATM switch provided in IP when network matching between next-generation intelligent network components is extended to an ATM interface.

In addition, the IP of the present invention performs the signaling end point function of the common line signal network, so that systems that intend to use the CCS No. 7 protocol as a network matching protocol have an effect of using the technology as it is. have. That is, there is an excellent effect that it is applicable to the case of exchanging messages with other systems by ISUP and INAP.

Claims (4)

In the intelligent information providing system using the internal switch of the asynchronous transmission mode method applied to the next generation intelligent network, Special resource processing means for providing a special resource to a service subscriber, comprising a local area network (LAN) matching board and an asynchronous transmission mode (ATM) matching board; Control means for responsible for signaling with an external system and controlling the special resource processing means; And Connecting means for connecting an internal channel between the control means and the special resource processing means using an asynchronous transfer mode (ATM) switch Intelligent information providing system utilizing the internal switch of the asynchronous transmission mode method including a. The method of claim 1, The special resource processing means, It is divided into sub units by function, and each sub unit provides intelligent information using an internal switch of an asynchronous transmission mode method, including a local area network (LAN) matching board and an asynchronous transmission mode (ATM) matching board. system. The method of claim 1, The control means, Input / output means for receiving a signal message from an external system and passing it through a matching process with the internal system, and transferring various special resources after the internal channel is connected to the external system; Protocol processing means for processing the signal message transmitted from the input / output means according to each protocol; Service control means for analyzing a service required by the external system using the signaling message processed by the protocol processing means and controlling an internal channel connection accordingly; And Switch matching means for delivering a special resource service to the external system through the matching means after performing a switch connection with the special resource processing means under the control of the service control means; Intelligent information providing system utilizing the internal switch of the asynchronous transmission mode method including a. The method according to claim 1 or 3, The control means, Intelligent information using an internal switch of the asynchronous transmission mode method, characterized by using an integrated information communication network user unit (ISUP) protocol for signal transmission with the external system and service control through connection with the special resource processing means. Provide system.