KR100407810B1 - Method and system for mutual intelligent peripheral service between voice over internet protocol and public switched telephone network line - Google Patents

Abstract

The present invention relates to a method and apparatus for mutual intelligent network service between a voice data integrated internet protocol (VoIP) and a public switched telephone network (PSTN).

In the mutual intelligent network service method between the voice data integrated Internet protocol and the public switched telephone network of the present invention, when the PSTN subscriber requests an IP service through the intelligent network, the service switcher 400 detects it and the number seven protocol processing unit 810 through the number seven signal network. Sending a message (A101); Confirming an error or the like of the message through the number seven protocol processor 810 and transmitting the message to the signal point routing processor 820 through a signal point (A102); Receiving, by the signal point routing processor 820, IP address data from the IP routing manager 830 by requesting an IP address of the signal point from the IP routing manager 830; Converting, by the signal point routing processor 820, the received IP address data into an SSUP (SESSION DESCRIPROR PROTOCOL) form in the ISUP-SIP mapping processor 850 and storing the received IP address data in a SIP body (A104); The ISUP processing unit 840 extracts information for each ISUP message type, reports it to the ISUP-SIP mapping processing unit 850, and the ISUP-SIP mapping processing unit 850 converts the ISUP message into a SIP message and outputs the result. Transmitting to the transceiving message storage unit 870 (A105); A step A106 of the message stream control unit 860 equally distributing traffic of the message stored in the transmission / reception message storage unit 870 and assigning a corresponding address to transmit the message to the IP transmission processing unit 880 to 883; Transmitting, by the IP transmission processing unit 880 to 883, the packetized SIP message to the SIP server 710 (A107); As the response message is received from the SIP server 710 to the IP transmission processing unit 880 to 883, the IP transmission processing unit 880 to 883 stores the SIP format message together with the port number in the transmission and reception message storage unit 870. (A108); Extracting, by the message stream control unit 860, signal point information rules from the transmission and reception message storage unit 870 using the port numbers of the IP transmission processing units 880 to 883; An ISUP-SIP mapping processing unit 850 converting the SIP format message stored in the transmission / reception message storage unit 870 into an ISUP format message and transmitting a message to the ISUP processing unit 840 (A110); The ISUP processing unit 840 generates a response message for the transmitted ISUP format message, and transmits it to the signal point routing processing unit 820 (A111).

Therefore, the mutual intelligent network service method between the voice data integrated Internet protocol and the public switched telephone network of the present invention provides an ISUP / SIP conversion apparatus for allowing a VoIP service subscriber to receive an existing PSTN intelligent network service or a PSTN subscriber to receive a VoIP intelligent network service. By simplifying the path of intelligent network connection between PINTN and SPIRITS servers and clients for the intelligent network access, and the existing PSTN network and IP network that used each application, the existing PSTN-oriented intelligent network service uses packet network. The advantage is that VoIP subscribers can be efficiently delivered through a simpler path.

Description

Method and system for mutual intelligent peripheral service between voice over internet protocol and public switched telephone network line}

The present invention relates to a method and apparatus for mutual intelligent network service between voice data integrated internet protocol (VoIP) and public switched telephone network (PSTN) using ISUP / SIP conversion, and more specifically, as the network evolves from a PSTN to an IP network, VoIP service SESSION INITIATION PROTOCOL The present invention relates to a method and apparatus for interworking intelligent network service between a voice data integrated Internet protocol and a public switched telephone network for accommodating an inter-converter, and simplifying call setup and routing for efficient PSTN and IP services.

In the early days of telephone service, the person sitting at the exchange handled the various needs of the customer, but with the development of technology, mechanical exchanges appeared and electronic exchanges became common. However, such automation has made great strides in processing speed or capacity, but it has not provided the ability to proactively handle the diverse needs of users.

Therefore, the intelligent network (IN), a structural concept considered to facilitate the introduction of new services and the provision of capabilities in such telecommunication networks, speeds up service introduction, expands the scope of services, and effectively competes among multiple producers. The goal is to provide an environment and provide the service provider with the ability to develop services independently of the actual equipment provider.

In addition, telecommunications service providers need standards for intelligent networks to meet the market demand for services quickly, inexpensively and selectively. Service providers can develop services independent of actual equipment, improve service quality, and network services. Intelligent network standards are needed to reduce the cost of operating and managing a network.

As shown in FIG. 1, the existing PSTN intelligent network includes a service switching point (SSP) for detecting events of the intelligent network service, a service control system (SCP) for controlling the intelligent network, and an intelligent network service. It provided an intelligent network service consisting of an Intelligent Peripheral (IP) (4) that manages special resources such as service management system (SMS) (1) that manages network services and announcements and DTMF tones.

However, as the traffic transitions from voice-centric to data-centric, the network itself has evolved from CIRCUIT NETWORK to PACKET NETWORK, so existing PSTN-oriented intelligent network services are seeking to accommodate VoIP subscribers using the PACKET network.

Currently, an intelligent network access model of the structure as shown in FIG. 2 is proposed for the intelligent network connection between the PSTN network and the IP network.

Conventionally, the intelligent network access model of FIG. 2 for receiving an intelligent network service between PSTN and IP requires a PSTN intelligent network service on the Internet, and is a PINT (PSTN INTERNET INTERWIORKING) system (11) (12) that matches a server and client type, and a PSTN intelligent network. This service includes Internet service system (13-15) that requires Internet service and is matched in the form of server and client.

However, in the conventional system in which PINT, SPIRITS server 12, 13, and client 11, 15 are required to receive intelligent network service between PSTN and IP as described above, applications of the PINT, SPIRITS server, and client exist. And the path is complicated.

Accordingly, the present invention is to solve the above-mentioned disadvantages and problems in the intelligent network service between the conventional PSTN and IP as described above, and simplify the intelligent network service connection between the PSTN and the IP through ISUP / SIP conversion using the ISUP / SIP converter. By simplifying the path, the purpose is to efficiently provide PSTN intelligent network service to VoIP service subscribers and intelligent network service on IP network to PSTN subscribers.

1 is a conventional PSTN intelligent network structure diagram.

2 is a schematic diagram of an intelligent network access model between an existing PSTN and an IP;

Figure 3 is a schematic network diagram for explaining the intelligent network access service path by the ISUP / SIP conversion in accordance with the present invention.

4 is a block diagram of an ISUP / SIP conversion apparatus for a mutual intelligent network service according to the present invention.

((Explanation of symbols for main parts of drawing))

100. Service Management System 200. Service Control System

300. Intelligent Attachment 400. Service Switch

500. Switching station 600. System operator terminal

700. SIP client 710. SIP server

800. ISUP / SIP Converter 810. Number Seven Protocol Processing Unit

820. Signaling point routing processing unit 830. IP routing management unit

840. ISUP processing unit 850. ISUP-SIP mapping processing unit

860. Message stream control unit 870. Send and receive message storage unit

880-883. IP Transmission Processing Unit 900. Media Gateway (MG)

The above object of the present invention includes a number seven protocol processing unit, a signal point routing processing unit, an IP routing management unit, a message stream control unit, a transmission and reception message storage unit, an ISUP processing unit, an ISUP-SIP mapping processing unit, and an IP transmission processing unit. Is achieved by a mutual intelligent network service method between voice data integrated Internet protocol (VoIP) and a public switched telephone network (PSTN) using an ISUP / SIP converter.

The ISUP / SIP conversion device is a conversion device between the integrated information communication network user unit (ISUP), which is one of the inter-station relay signal processing protocols, and the session establishment protocol (SIP) for establishing a session on the IP network. Make it available.

The NO7 protocol processing unit matches the service switch (SSP) of the intelligent network with NO7 MTP-2 and MTP-3, receives the subscriber's signal information, and transmits a message converted from SIP to ISUP.

The signaling point routing processor manages the destination in the transmission and reception direction for communication with the service switch (SSP), and when it is converted into SIP message, the signal point routing processor receives the physical connection path on the IP network and sends a signal to the IP routing manager so that the message can be transmitted over the IP. Send a message about point information.

The IP routing management unit assigns an IP address corresponding to the number seven signaling point when transmitting the SIP message converted into the IP network, sets the path, and assigns a signaling point for the corresponding IP address when the IP message is converted to the ISUP message and transmitted to the service exchange. To transmit to the signal point routing processor.

The message stream control unit distributes the message traffic so that it can distribute the message traffic on the IP network evenly when communicating with the SIP server. The number seven signal point corresponds to the transmission / reception message storage unit using the header converted to IP. Assign an address.

The transmission / reception message storage unit stores the message in the SIP message format from the ISUP-SIP mapping processing unit, and transmits the message to the corresponding port of the IP transmission processing unit under the control of the message stream controller.

The ISUP processing unit processes the number seven ISUP message and transmits the information on the origination information and the incoming information to the ISUP-SIP mapping processing unit so that the conversion is performed in the SIP format.

The ISUP-SIP mapping processor interprets the ISUP message and performs mapping using the corresponding SIP primitive.

The IP transmission processor converts the IP packet into a packet for transmitting or receiving a message on the IP network.

Details of the above object and technical configuration and the effects thereof according to the present invention will be more clearly understood by the following detailed description with reference to the accompanying drawings.

FIG. 3 is a schematic network diagram illustrating an IP intelligent network access service path by ISUP / SIP conversion according to the present invention, and FIG. 4 is an ISUP / SIP conversion device for mutual intelligent network service between VoIP and PSTN according to the present invention. The configuration diagram.

As shown, in order to provide intelligent network services, various network components must be logically connected to each other. Such a network configuration includes a service switch 400, an intelligent additional device 300, a single station switch 500, 500 ', and the like. And a service layer including a service layer including a service control system 200 and a service management system 100 and a signal layer serving as a relay connecting the service layer and the service layer.

The transport layer actually exchanges and transmits information such as voice and data through the intelligent network, and the user receives the intelligent network service through a terminal directly connected to the transport layer, and the information for the service is transmitted to the service layer via the number seven common line signal network. To be controlled for service processing.

The signal layer is an overlay network for signal transmission between each network element. In general, the number seven common line signal network is a standard access network, and serves as a relay connecting the upper service layer and the lower transport layer. Do this.

The service layer receives the service request of the intelligent network generated from the transport layer, holds the service subscriber and control logic, and controls the service control system 200 and the service data in the service control system 200 to control the service call. It consists of a service management system 100 for managing.

The PSTN intelligent network system includes a single station switch 500 (500 ') that receives a service call from an intelligent network service subscriber using a telephone (not shown); A service exchanger (400) connected to the single station exchanger (500) (500 ') and transmitting an intelligent network service call; A common line signal network connected to the service switch 400 to transmit service control information; A service control system 200 connected to the common line signal network to perform a function of controlling a service call in a network dimension; A service management system 100 connected to the service control system 200 to manage service data; And an intelligent additional device having a voice setting, a voice synthesis, a voice storage, a voice recognition, a number analysis function, etc., using the ISDN user unit (ISUP) protocol as a signal between the service switch 400 and the station. IP) 300 is configured.

The operation process of the intelligent network system configured as described above is as follows.

First, when a PSTN service subscriber makes a call to an intelligent network, the terminal switch 500 (500 ') routes to the service switch 400 that receives the intelligent network, and the service switch 400 controls the service for the intelligent network. For transmission to the service control system 200 through the common line signal network.

After performing the necessary control on the received intelligent network, the service control system 200 determines whether a connection to the intelligent additional device 300 is required (for example, retrieves a voice message of a corresponding subscriber stored in the IP, or is provided in the IP). When it is determined that a connection to IP is necessary because a high level function such as a voice recognition function is required), or when a specific condition (for example, the called party is busy or no answer) is satisfied at the service switcher 400, The connection phone number of the intelligent additional device 300 is sent down to the service switcher 400 so that the call can be routed to the intelligent additional device 300.

Upon receiving the access telephone number, the service switcher 400 routes the intelligent network signal directly to the intelligent additional device 300 based on the service control processing result received from the service control system 200, or, if there is a specific condition, If the condition is satisfied, the intelligent network call is routed to the intelligent additional device 300.

At this time, the access number of the intelligent additional device 300 uses the same access number as a general telephone, and uses the ISDN user part protocol as a signaling method between the service switch 400 and the intelligent additional device 300 for call connection.

The intelligent additional device 300 at the time of call establishment includes the intelligent network service number in the first called number or the call forwarding number parameter among the selected parameters in the call setup initial address message (IAM) of the ISDN user part protocol. The intelligent network service number of the access call can be known and the function required by the intelligent additional device 300 is executed.

On the other hand, when the PSTN subscriber requests the intelligent network service on the IP network, the service switcher 400 detects this and corresponds to the ISUP / SIP converter 800 through the number seven signal network under the control of the service control system 200. Will send a message.

At this time, the ISUP / SIP conversion apparatus 800 receives the message, checks the error of the message, extracts the IP address through the signal point, and converts and stores the IP address data for the corresponding signal point in the SDP form.

The ISUP / SIP conversion apparatus 800 extracts information for each ISUP message type to perform conversion into a SIP message conversion area through control of the corresponding message, and packetizes the converted SIP message and transmits the packet to the SIP server 710. .

The SIP server 710 transmits a response message to the transmitted message to the ISUP / SIP conversion apparatus 800, and the ISUP / SIP conversion apparatus 800 converts the SIP format message to the ISUP format to exchange the service switch 400. ), Intelligent network service between PSTN intelligent network and IP network is achieved.

On the contrary, when the VoIP subscriber requests the PSTN intelligent network service, the SIP client 700 transmits the related signaling data to the SIP client 700 by using the SIP protocol as the VoIP subscriber transmits the intelligent network request related message to the SIP client 700 (step B101). Transmit to ISUP / SIP conversion device 800 (step B102).

In the ISUP / SIP conversion apparatus 800, as described above, when the PSTN subscriber requests the VoIP intelligent network service, the SIP message is converted into the ISUP message and the service is converted in the same manner as the method for converting the ISUP message into the SIP message. Transmit to switch 400 (step B103).

Accordingly, the service switch 400 detects the intelligent network event and transmits the corresponding message to the service control system 200 (B104) so that the VoIP subscriber can receive the PSTN intelligent network service.

Next, the ISUP / SIP conversion apparatus 800 for accessing the IP intelligent network includes a number seven protocol processing unit 810, a signal point routing processing unit 820, an IP routing management unit 830, and the like. And a message stream control unit 860, an ISUP processing unit 840, an ISUP / SIP mapping processing unit 850, a transmission / reception message storage unit 870, and an IP transmission processing unit 880-888.

Referring to the driving process of the ISUP / SIP conversion apparatus 800 of the above-described configuration in more detail as follows.

First, when a telephone subscriber (service user) attempts an IP service through an intelligent network in the PSTN intelligent network, the service switch 400 of the transport layer detects this and transmits a message to the ISUP / SIP converter 800 through the number seven signaling device. (Step A101).

The ISUP / SIP converter 800 checks the error of the message through the number seven protocol processing unit 810, and then sends the message to the signal point routing processing unit 820 to know the IP address through the signal point routing processing unit 820. Transmit (step A102).

Next, as the signal point routing processor 820 requests the IP address for the signal point to the IP routing manager 830, the IP routing manager 830 transmits the IP address data for the signal point to the signal point routing processor. 820).

The signal point routing processor 820 converts the IP address data of the corresponding signal point received from the IP routing manager 830 (step A103) into an ISUP / SIP mapping processor 850 in the form of SESSION DESCRIPROR PROTOCOL (SDP) and SIP. Save to the body (step A104).

The ISUP processing unit 840 extracts information for each ISUP message type, transfers the information to the ISUP / SIP mapping processing unit 850, and transfers the information to the SIP message conversion area through control of the corresponding message to perform the conversion.

The ISUP / SIP mapping processing unit 850 converts the SIP message for the ISUP message and transmits the result to the transmission / reception message storage unit 870 (step A105).

The message stream control unit 860 causes the SIP message transmitted from the ISUP / SIP mapping processing unit 850 to the transmission / reception message storage unit 870 to be transmitted to the IP transmission processing units 880 to 883 (step A106).

The IP transmission processing unit 880 to 883 packetizes the corresponding SIP message and transmits the message to the SIP server 710 (step A107).

The IP transmission processing unit 880 to 883 receives the response message of the SIP server 710 and stores the SIP format message in the transmission and reception message storage unit 870 together with the port number of the IP transmission processing unit 880 to 883 (A108). Step).

The message stream control unit 860 extracts signal point information using the port numbers of the IP transmission processing units 880 to 883 (step A109).

The ISUP / SIP mapping processor 850 converts the message to the ISUP format and transmits the message to the ISUP processor 840 (step A110).

The ISUP processing unit 840 generates a corresponding response message and transmits the response message to the signal point routing processing unit 820 (step A111) to communicate with the service exchanger (SSP) through the number seven protocol processing unit 810.

Looking at each component of the ISUP / SIP conversion device 800 in more detail as follows.

First, the number seven protocol processing unit 810 is matched with the service switch 400 of the intelligent network, the number seven MTP-2 (Message Transfer Part Level 2), MTP-3 receives the subscriber's signal information and converts from SIP to ISUP Sends a message to the PSTN to perform the intelligent network call processing.

The signal point routing processor 820 manages a destination in the receiving direction for communication with the service switcher 400, and when converted into a SIP message, a message is transmitted over the IP by being assigned a physical connection path on the IP network. The IP routing manager 830 transmits a message for signaling point information.

The IP routing management unit 830 sets a path by allocating an IP address corresponding to the NO7 signal point when transmitting the converted SIP message to the IP network, and converts the ISUP message to the corresponding IP address when transmitting to the service switch 400. Allocate a signal point for a signal point and transmit the signal point to a signal point routing processor.

The message stream control unit 860 distributes the message traffic so as to distribute the message traffic evenly over the IP network when communicating with the SIP server 710, and uses the header with the number seven signal point converted to IP. The address is allocated to the transmission / reception message storage unit 870.

The transmission / reception message storage unit 870 stores the message in the SIP message format from the ISUP-SIP mapping processing unit 850 and sends the message to the corresponding port of the IP transmission processing unit 880 to 883 through the control of the message stream control unit 860. Send it.

The ISUP processing unit 840 processes the number seven ISUP message and transmits the information on the outgoing information and the incoming information to the ISUP-SIP mapping processing unit 850 so that the conversion is performed in the SIP format.

The ISUP-SIP mapping processor 850 interprets the ISUP message and performs mapping using the corresponding SIP primitive.

IP transmission processing unit (880 ~ 883) is an IP packet to transmit or receive a message on the IP network.

Accordingly, the method and apparatus for mutual intelligent network service between the voice data integrated Internet protocol and the public switched telephone network according to the present invention are ISUP / SIP conversion for allowing a VoIP service subscriber to receive an existing PSTN intelligent network service or a PSTN subscriber to receive a VoIP intelligent network service. By accommodating the device, PINT and SPIRITS server and client for intelligent network access, and the existing PSTN network and IP network intelligent network connection using the respective applications are simplified, and the existing PSTN-oriented intelligent network service is used for packet network. There is an advantage that can be efficiently provided to a VoIP subscriber using a simpler path.

Claims (3)

When a PSTN subscriber requests an IP service through an intelligent network, the service switcher 400 detects this and transmits a message to the NO.7 protocol processing unit 810 through NO.7 (A101) and sends the NO.7 protocol processing unit 810 to the PSTN subscriber. Checking an error of the message through the signal point and transmitting the message to the signal point routing processor 820 through the signal point (A102); The IP address data is received (A103) by requesting the IP address for the signal point from the IP routing manager 830 of the signal point routing processor 820, and the received IP address data is sent to the ISUP-SIP mapping processor 850. Step S104 is converted to the SDP form and stored in the SIP body, At this time, the ISUP processing unit 840 extracts information for each type of ISUP message, reports it to the ISUP-SIP mapping processing unit 850, and the ISUP-SIP mapping processing unit 850 converts the ISUP message into a SIP message, The result is transmitted to the transmission / reception message storage unit 870 (A015). The traffic of the message stored in the transmission / reception message storage unit 870 is equally distributed by the message stream control unit 860 so that the IP transmission processing unit by the corresponding address assignment ( 880 to 883) transmitting the message (A106), The IP transmission processing unit 880 to 883 packetizes the corresponding SIP message and transmits the message to the SIP server 710 (A107), and a response message is received from the SIP server 710 to the IP transmission processing unit 880 to 883. In step A108, the IP transmission processor stores the SIP format message together with the port number in the transmission / reception message storage unit 870. The message stream control unit 860 extracts signal point information from the transmit / receive message storage unit 870 using the port numbers of the IP transmission processing units 880 to 883 (A109), and the ISUP-SIP mapping processing unit 850 transmits the transmit / receive message. By converting the SIP format message stored in the storage unit 870 into an ISUP format message, the message is transmitted to the ISUP processing unit 840 (A110), and the ISUP processing unit 840 generates a response message to the transmitted ISUP format message. And a step (A111) of transmitting to the signal point routing processing unit (820). delete A number seven protocol processing unit 810 for matching the SSP of the intelligent network with the number seven MTP-2, 3 and receiving subscriber signal information and transmitting a message converted from SIP to ISUP; A signal point routing processor 820 which manages the transmission and reception destination of the ISUP message and the SIP message and transmits a message about the signal point information to the IP routing manager 830 so that the message converted into SIP can be transmitted on the IP; IP routing management unit 830 to assign the IP address corresponding to the number seven signal point when transmitting the converted SIP message and ISUP message to set the path, and to assign the signal point for the corresponding IP address to the signal point routing processing unit 820 )Wow; A message stream control unit 860 for distributing message traffic to be transmitted on the IP network when communicating with the SIP server so that the number seven signal point assigns a corresponding address to the transmission and reception message storage unit 870; An ISUP-SIP mapping processor 850 for interpreting and mapping the ISUP message using a SIP primitive corresponding to the ISUP message; Transmitting and receiving message storage unit 870 that stores the formatted SIP message from the ISUP-SIP mapping processing unit 850 and transmits the message to the corresponding port of the IP transmission processing unit 880 to 883 under the control of the message stream control unit 860. Wow; An ISUP processing unit 840 for transmitting the information on the outgoing information and the incoming information to the ISUP-SIP mapping processing unit 850 so as to be converted into a SIP format; An IP transmission processing unit 880 to 883 which performs IP packetization to transmit and receive a message on the IP network; An inter-intelligent network service device between voice data integrated internet protocol and a public switched telephone network.