KR100772536B1 - Method of signaling for providing VoIP service over IMS-based WiBro network - Google Patents

Abstract

The present invention relates to a VoIP service providing method in an IMS-based WiBro network. The present invention relates to a core network of fixed-mobile convergence based on IMS and to carrying an access network. Under the structure composed of the Internet (WiBro), according to the implementation of Voice over Internet Protocol (VoIP) services between the portable Internet manganese (WiBro-WiBro), the mobile Internet and the wired telephone network (WiBro-PSTN) It is about interlocking and the method. The mobile Internet (WiBro), the core network of wired and wireless integration, complements the problems of existing wireless Internet services, enabling wide coverage, fast transmission speed, and low usage fee.It is a subsystem of multimedia core network based on the All IP concept. The IMS (IP Multimedia Core Network Subsystem), which is proceeding standardization from the Standardization Organization to the Core Network of the next generation mobile communication system, enables mass data service provision and global roaming.

IMS based, WiBro network, VoIP service

Description

Method of signaling for providing VoIP service over IMS-based WiBro network in IMS-based Wi-Fi network

1 is a block diagram of a portable Internet (WiBro) network according to the present invention

2 is a configuration diagram of IMS of 3GPP / 3GPP2 according to the present invention;

3 is a block diagram of an IMS interworking with a mobile Internet (WiBro) network according to the present invention

4 is a configuration diagram of an interworking network for providing a mobile Internet (WiBro) VoIP service according to the present invention;

5 is an exemplary diagram for a VoIP service procedure in a mobile Internet (WiBro) according to an embodiment of the present invention

6 is a flowchart of a VolP service procedure in WiBro according to an embodiment of the present invention.

7 is an exemplary VoIP service procedure between a WiBro network and a PSTN according to an embodiment of the present invention.

8 is a flowchart illustrating a VoIP service procedure between a WiBro network and a PSTN according to an embodiment of the present invention.

9 is a diagram illustrating a VoIP service procedure between a mobile Internet (WiBro) network and a mobile communication network according to an embodiment of the present invention.

10 is a flowchart of a VoIP service procedure between a WiBro network and a mobile communication network according to an embodiment of the present invention.

FIG. 11 is a table comparing PSTN and components for providing VoIP service in IMS based WiBro network. FIG.

12 is a view related to considerations of VoIP service in WiBro network

13 is a diagram of nodes and functions of an IMS.

The present invention relates to a VoIP service providing method in an IMS-based WiBro network. The present invention relates to a core network of fixed-mobile convergence based on IMS and to carrying an access network. Under the structure composed of the Internet (WiBro), according to the implementation of Voice over Internet Protocol (VoIP) services between the portable Internet manganese (WiBro-WiBro), the mobile Internet and the wired telephone network (WiBro-PSTN) It is about interlocking and the method.

Since Korea's first PC-to-PC Internet phone was provided free of charge in January 2000, by the end of 2003, about 200,000 Internet phone subscribers had grown into a niche market with differentiated rates and services. However, due to the low call quality and disconnection in the current Internet network without QoS guarantee, the proliferation of service is delayed and the stable growth of internet phone has been difficult due to the random number of the operator. In order to revitalize and stabilize the growth of Internet telephony, the government has been conducting Internet telephony service announcements on October 1, 2004, focusing on the establishment of Internet telephone service and the assignment of called party numbers. According to this notice, Internet phone uses 070 called number and provides service only if it meets certain level of quality condition. Experts are expected to continue to activate Internet phone in Korea by enacting these laws. It is expected to replace existing telephone service.

In recent years, researches are being actively conducted on standardization technologies related to wired / wireless integration and IMS (IP Multimedia Core Network Subsystem) of 3GPP standards.

Accordingly, the present invention provides a VoIP service for an IMS-based WiBro network according to the development of the above technology, and complements the problems of the existing wireless Internet service to provide a next generation wireless device having wide coverage, fast transmission speed, and low usage fee. IMS (IP Multimedia Core Network Subsystem), which is a sub-system of the all-concept multimedia core network that forms the Internet service (WiBro) network and standardizes from 3GPP (Standardization Organization) to Core Network of next generation mobile communication system. To implement a Voice over Internet Protocol (VoIP) service between the mobile Internet manganese (WiBro-WiBro), the mobile Internet and the wired telephone network (WiBro-PSTN), and the mobile Internet and the mobile network (WiBro-CDMA). To provide. To this end, the present invention provides a large-capacity data service capable of a multimedia service, which is one of the core elements of the mobile Internet and the next generation mobile communication network, which improves the disadvantages of the space limitation of the existing wired Internet service, the low transmission speed and the high usage fee of the mobile Internet service. In order to meet the demand of wireless data traffic through interworking with IMS, which has the advantages of global roaming and global roaming, and to provide a signaling method for stably providing VoIP service in IMS-based WiBro network and voice service provided by PSTN and mobile communication network. do.

According to an embodiment of the present invention, a signaling method for providing a VolP service in an IMS-based portable Internet (WiBro) network according to the present invention includes a URI (Uniform) of a receiving terminal in a transmitting terminal of a portable Internet (WiBro) network. Transmitting a VolP service request message (INVITE) including a Resource Identifier to a call processing control unit (S-CSCF) of an IMS interworking with the portable Internet network, wherein the call processing control unit transmits the service information through a subscriber information management server (HSS); Confirming a Session Initiation Protocol (SIP) address of the receiving terminal through the integrated identification number system server (ENUM server) for converting a dial number into an Internet address system after authenticating the service of the transmitting terminal; Transmitting, by the processing controller, the service request message to the receiving terminal by using the SIP address; and the service request message of the receiving terminal. A response message as to whether via the call processing control method comprising: transmitting to the transmitting terminal; is configured to include a.

Another embodiment of a signaling method for providing a VolP service of an IMS-based portable Internet (WiBro) network of the present invention for achieving the above technical problem is linked to the IMS in a transmitting terminal of a portable Internet (WiBro) network. Transmitting a VolP service request message (INVITE) including a Uniform Resource Identifier (URI) of a receiving terminal of a wireline telephone network to a call processing control unit (S-CSCF) of an IMS interworking with the portable Internet network, in the call processing control unit, After authenticating the service of the transmitting terminal through a subscriber information management server (HSS), confirming the SIP address of the receiving terminal with respect to the URI through an integrated identification number system server (ENUM server) that converts a dial number into an Internet address system. And transmitting the service request message through a wired telephone network through a media gateway (MGCF), which is an interworking server of the wired telephone network and the portable internet. Converting the message into a message and transmitting the message to the receiving terminal; converting the response message of the receiving terminal with respect to the converted service request message into a response message transmittable through the media gateway to the transmitting terminal; And converting the message including the information that the receiver of the receiving terminal is heard into a message that can be transmitted from the mobile Internet through the media gateway and transmitting the message to the terminal.

Another embodiment of a signaling method for providing a VolP service in an IMS-based WiBro network of the present invention for achieving the above technical problem is linked to the IMS in a transmitting terminal of a WiBro network. Transmitting a VolP service request message (INVITE) including a reception terminal Uniform Resource Identifier (URI) of a mobile communication network to a call processing control unit (S-CSCF) of an IMS interworking with the portable Internet network, in the call processing control unit, After verifying the service of the transmitting terminal through the subscriber information management server (HSS), and confirms the SIP address of the receiving terminal with respect to the URI in the integrated identification number system server (ENUM server) that converts the dial number into the Internet address system In the step, the service request message can be transmitted from the mobile telephone network through a media gateway (MGCF) which is a linked server of the mobile telephone network and the portable internet. Converting the message into a mobile telephone switching center and transmitting the converted message to a receiving terminal of the mobile telephone network after identifying a location of a receiving terminal of the mobile telephone network to be received by the mobile telephone switching center. Converting a response message for the converted service request message of the terminal into a response message that can be transmitted from the mobile Internet through the media gateway, and transmitting the response message to the transmitting terminal; and a message including information indicating that the receiver has heard the receiver ( Answer message) is converted into a response message that can be transmitted from the portable Internet through the media gateway and transmitted to the transmitting terminal.

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

FIG. 11 is a diagram illustrating a PSTN and component comparison table for providing VoIP service in an IMS based WiBro network.

Referring to FIG. 11, a result of comparing components with PSTN for providing VoIP service in IMS-based WiBro is similar to components of voice service provided by a conventional soft switch. In particular, it can be seen that some components match.

12 is a view related to considerations of VoIP service in a WiBro network.

Referring to FIG. 12, technical considerations for providing VoIP service in IMS-based portable Internet (WiBro) and considerations for VoIP service in WiBro network are shown.

Two cases can be considered as considerations of interworking between WiBro network and PSTN for providing VoIP service in IMS-based WiBro. Firstly, the PSTN uses an additional telecommunication service (Intelligent Network Service) of WiBro network, and secondly, uses a PSTN based additional telecommunication service (Intelligent Network Service) in WiBro network. In the first case, 1) SSP can directly communicate with AS (SCP role) of WiBro network, and 2) WiBro network can communicate with AS (SCP) via IMS (CSCF). In the second case, 1) the IMS (CSCF) can communicate directly with the SCP of the intelligent network, and 2) it can communicate with the SCP via the intelligent network SSP.

In order to achieve the above object, the method of the present invention performs radio link access and basic function negotiation between the PSS and the RAS in order to receive the portable Internet service. If this procedure is successful, the portable internet authentication procedure is performed. This is done by interworking with IMS via Edge Router. I-MS's P-CSCF can check whether the PSS is in service (if the PSS is a mobile subscriber) according to the policy of the PDF (Policy Decision Function). The P-CSCF checks the subscriber profile of the HSS for subscriber authentication and performs subscriber authentication and service authentication procedures.

Next, the traffic connection setup procedure is performed. It considers the service profile of the mobile Internet subscriber and the current network status to determine whether the QoS Manager can provide the service requested by the subscriber. That is, the QoS Manager manages the state of the IMS network and the state of the access network (portable Internet network). Therefore, the mobile Internet and the status of the IMS determines whether it is acceptable for the QoS request range of the subscriber and, if it is acceptable, provides the service in connection with the charging management function of the HSS.

13 is a diagram of nodes and functions of an IMS.

IMS (IP Multimedia Core Network Subsystem) is a subsystem of the all-media multimedia core network and is standardized from 3GPP (Standardization Organization) to Core Network of next generation mobile communication system.The basic nodes of IMS and the function of each node These are shown in detail in the table of FIG. 13.

1 is a block diagram of a WiBro network according to the present invention.

Referring to FIG. 1, the elements illustrated in FIG. 1 are briefly described as follows.

ACR: Access Control Router RAS: Radio Access Station

PSS: Portable Subscriber Station HA: Home Agent

AAA: Authentication, Authorization, Accounting (Authentication Server)

PE: Provider Edge (router) FA: Foreign Agent

NMS: Network Management System ER: Edge Router

Mobile Internet services include WiBro service and Internet phone (VoIP) among the eight new services of IT 8-3-9 strategy (eight new services, three advanced infrastructures, nine new growth engines). In addition, the three advanced infrastructures include Broadband convergence network (BcN), IPv6, and next-generation mobile communication as nine new growth engines. In other words, the 2.3GHz mobile Internet is closely related to BcN, IPv6 technology, which is an advanced infrastructure, and Internet telephony, which are eight services, as well as next generation mobile communication, which is the 9th growth engine. Therefore, VoIP service in the WiBro is an important opportunity for introducing various services to be developed in the future.

As a method of providing a mobile Internet service, a mobile Internet subscriber can receive various services such as a multimedia service through interworking with an existing network. In addition, the mobile Internet can be provided with a voice service VoIP service by interworking with a wireless telephone network and a PSTN / PLMN.

In 2G (Generation) network, mobility, voice service and small data service are available. Therefore, there is no limit to the ability of the existing network to meet the various service needs of users. Therefore, in the concept of All IP network, that is, 3GPP, the introduction of IMS is considered as an alternative to overcome the limitations of the existing network. In addition, the advantages of IMS, which has the advantages of providing a large amount of data service capable of multimedia services and global roaming, are being actively introduced in ITU-T's NGN standardization. In Korea, functional elements of IMS are actively discussed in the development of BcN standard model, and well-known domestic and overseas telecommunications companies such as Lucent, Alcatel, and SKT are also providing or planning IMS-based solutions.

The mobile Internet provides MIP (Mobile Internet Protocol) by default to provide a seamless service to mobile terminals indoors and outdoors in a cellular network configuration using broadband wireless transmission technology in the 2.3 GHz frequency band. Therefore, the mobile terminal can receive services continuously even between the subnets (ER: edge routers). It also provides a simple IP service that cannot be moved between subnets. Let's take a closer look at these elements.

Portable Subscriber Station (PSS) 101 is an endpoint of a wireless channel and communicates with a Radio Access Station (RAS) and an Orthogonal Frequency Division Modulation Access (OFDMA) scheme according to a wireless access standard.

RAS (Radio Access Station) 102 is a device that connects a wireless network and a wired network, controls a wireless channel according to the characteristics of each network, and is connected to a wired network to provide a wireless packet data service directly in the PSS. The main functions are to transmit and receive radio signals, to perform modulation and demodulation signal processing for packet traffic signals, and to perform protocol processing and routing functions.

An ACR 103 is connected to and manages a plurality of RASs, and performs a handover control function to ensure high-speed mobility in the ACR. For this purpose, RAS and ACR are connected based on the IP protocol and are configured based on Gigabit Ethernet switch for high speed packet transmission.

The edge router 100 is a router that connects the operator's IP network to the mobile Internet and is connected to several ACRs. As an end of the operator IP network, it can provide a mobile Internet service in conjunction with a high-speed Internet network or in conjunction with a 3GPP / 3GPP2 network.

The operator IP network 110 may be independently constructed to provide a mobile Internet service as an independent network of communication providers, or may be configured to accommodate the mobile Internet as an existing network. High-speed Internet represents the network of operators currently in place.

The edge router 120 is a router for interworking with an operator IP network and an international network or another operator's network 130.

AAA (Authentication, Authorization, Accounting) server is the authentication and authorization of the mobile Internet service subscriber. It is in charge of functions such as billing.

The home agent (HA) 140 performs a home agent function to provide a mobile IP service to a PSS (terminal).

2 is a block diagram of an IMS of 3GPP / 3GPP2 according to the present invention.

The evolution of All IP networks and services is based on the existing packet generation capability (PS Domain) of the 3rd generation network. The new IP is based on the rapid deployment of new multimedia-based services and the construction of an IP-based open architecture and service platform that supports them. Introducing the multimedia domain into the core network of mobile communication. This is originally an upgrade of IP transport, but in that vision, it is developing as a concept with higher-level multimedia service applications, which is the concept of IP Multimedia Service Domain.

Several years ago, 3GPP and 3GPP2, the international standardization organizations for mobile networks, agreed on the standard of international roaming of all IP networks into a single network, and released the Harmonized IMS Model agreed between 3GPP and 3GPP2 (Common 3GPP / 3GPP2 Harmonization Reference Model: HRM).

In this regard, an IMS configuration diagram of 3GPP / 3GPP2 will be described below.

The terminal 200 is a terminal for receiving a wireless Internet service, and performs Internet access in a mobile communication network, and the access network 210 is an access network for providing a wireless Internet access to a terminal, RNC (Radio Network Control), SGSN. (Serving GPRS Network) and GGSN (Gateway GPRS Network).

The IP network 230 is a network of other operators that are constructing IMS 220 of 3GPP / 3GPP2, and the Public Service Telephone Network (PSTN) / Public Land Mobile Network (PLMN) 240 is a fixed landline subscriber network or wireless. Represents a telephone subscriber network.

3 is a block diagram of an IMS interworking with a WiBro network according to the present invention.

Referring to FIG. 3, the portable Internet network 300 is connected to the operator IP network 301 to work with the standardized IMS subsystem 320 of 3GPP / 3GPP2. The IMS subsystem includes a PDF (Policy Decision Function) 321, a Call Processing Control Unit (CSCF) 322, and a Media Gateway (MGW) 323 for interworking with other networks. In addition, the system includes a network management system (NMS) (311) for managing the mobile Internet and the IMS subsystem (310), a home location register (HLR) and an authentication center (AUC) for performing existing mobile subscriber management. Home Subscriber Server (HSS) system 312 that performs subscriber information management in all IP networks, QoS Manager 313 that manages the status of IMS networks and access networks (portable Internet networks), DNS / ENUM ( DNS: Domain Name System: A system that manages domain names on a network) (314) / ENUM (tElephone NUmber Mapping: E.164 phone numbers used in everyday life are stored in the Internet Domain Name System (DNS) as Information Identifiers. And a server 314 to perform various communication connections such as reception, telephone, email, homepage, and fax.

In addition, the public IP network (340) and the PSTN / PLMN (330) can be used in conjunction with the existing Internet network, interworking with wired telephone subscribers and wireless telephone network.

Figure 4 is a network diagram for providing a mobile Internet (WiBro) VoIP service according to an embodiment of the present invention.

Hereinafter, elements of a network diagram for providing a WiBro VoIP service according to the present invention will be described.

IP Multimedia CN Network (IMS) 410 plays a role of service control, call control and bearer control, and includes a protocol for service control, a call agent function and server for call control, and an MGC for media control. tElephone NUmber Mapping provides a mechanism to translate ITU-T E.164 numbering into Internet addressing.

SGW (Signaling Gateway) plays a role to deliver TCAP and ISUP message to MGC by interworking MTP message, No.7 lower transport layer with IP, but does not perform other signal conversion function.

The MGW (Media Gateway) operates at the media transport layer, converting the voice PCM format to RTP, which is a packet format, and conversely to the voice PCM, which is a circuit format, and MGCF (Media Gateway Control Function) performs protocol conversion between control protocols. The MGW is controlled for the actual bearer connection of the call generated by the signaling.

SSP (Service Switching Point) is a switch of PSTN that has the function of calling / receiving of SS7 Signal Unit, and is capable of processing SS7 protocol, and STP (Signal Transporting Point) serves as a packet switch that transmits signal unit between SSP and SCP. Responsible for routing Signal Unit. In practice, this can be implemented using only the MTP layer of the SS7 protocol layer.

The service control point (SCP) controls the service through the service logic at the request of the SSP, and has a service logic module called a service logic program (SLP) and user data to support it.

MSC (Mobile Switching Center) is a central control unit of mobile communication network and controls wireless link and wired link. It plays a role of accessing a mobile terminal and a fixed telephone network (mobile telephone base station) or another communication network and manages a mobile subscriber in conjunction with an HLR.

The base station controller (BSC) is located between the base station and the mobile switching center, and is responsible for base station management and control. The base transceiver station (BTS) performs baseband signal processing, wired / wireless conversion, and transmission and reception of wireless signals, directly to subscriber terminals. It acts as a network termination device connected to the network.

5 is an exemplary diagram of a VoIP service procedure in a WiBro network according to an embodiment of the present invention.

The procedure shown in the mobile internet and IMS interworking procedure example will be briefly described below.

The PSS # 1 (terminal) sends a service request message (INVITE) to the SIP Tel URI to the P-CSCF (call processing control substitute) of the IMS. Then, the P-CSCF forwards the service request message of the PSS # 1 to the S-CSCF (call processing unit), and the S-CSCF performs the service authentication process of the PSS # 1 in association with the subscriber information management server (HSS).

The HSS then provides the S-CSCF with the authentication result information of PSS # 1, and the S-CSCF sends a Tel URI to the ENUM server (Unified Identification Number Server) to find the destination (PSS # 2) requested by PSS # 1. Send it. Thereafter, the ENUM server sends the SIP URI for the Tel URI to the S-CSCF, and the S-CSCF forwards the service request message to the P-CSCF managing PSS # 2.

P-CSCF that manages PSS # 2 sends a service request message of PSS # 1 and sends a response message to the request message in PSS # 2. The P-CSCF forwards the response message for the request message to the S-CSCF, and the S-CSCF forwards the response message for the request message to the P-CSCF managing PSS # 1.

P-CSCF that manages PSS # 1 delivers response message to request message to PSS # 1, a signaling session is established, and then communication is performed by transmitting actual data.

6 is a flowchart of a VolP service procedure in the WiBro according to an embodiment of the present invention.

Referring to FIG. 6, when a transmitting terminal transmits a VolP service request message including a URI of a receiving terminal to a call processing control unit (S-CSCF) of an interworking IMS (601), the transmitting terminal is transmitted through a subscriber information server and an ENUM server. The service authentication and the SIP address of the receiving terminal is confirmed (602).

Thereafter, when the request message is delivered to the receiving terminal using the verified SIP address (603), a response message to the request message of the receiving terminal is delivered to the transmitting terminal to establish a signaling session (604). .

7 is a diagram illustrating a VoIP service procedure between a WiBro network and a PSTN according to an embodiment of the present invention.

The procedure shown in the exemplary VoIP service procedure diagram between the WiBro and the PSTN will be briefly described below.

The PSS (transmitting terminal) transmits the service request message to the P-CSCF (call processing control substitute) by the Tel URI, and the P-CSCF forwards the service request message to the S-CSCF (call processing control unit).

The S-CSCF performs the service authentication process of the PSS in association with the subscriber information management server (HSS), and the HSS finally provides the service authentication result information of the PSS to the S-CSCF. The S-CSCF then forwards the Tel URI sent by the PSS to the ENUM server (Integrated Identification Number Server) to find the destination of the PSS, and the ENUM server provides the SIP URI (address of MGCF / MGW) for the Tel URI. do.

The S-CSCF then forwards the service request message to the MGCF (media gateway), the MGCF converts the SIP message into an ISUP message for the PSTN, and the SGW (signaling gateway) forwards the service request message to the service exchanger (SSP). To pass.

The SSP delivers the service request message to the PSTN terminal, and the PSTN terminal transmits a response message (call waiting) to the SSP.

The SSP sends back a response message for the service request message to the SGW, and the SGW sends a response message for the service request message to the MGCF. The MGCF converts the ISUP message into a SIP message and then sends a response message (call waiting) to the service request message to the S-CSCF.

The S-CSCF forwards the response message for the service request message to the P-CSCF, and the P-CSCF forwards the response message for the service request message to the PSS.

Finally, the PSTN terminal transmits a message including information indicating that the handset is picked up to the SGW. The SGW delivers a message including information indicating that the PSTN terminal has picked up the handset to the MGCF, and the MGCF converts the ISUP message into a SIP message and then delivers a response message for the service request message to the S-CSCF.

The S-CSCF forwards the response message for the service request message to the P-CSCF, and the P-CSCF forwards the response message for the service request message to the PSS.

As a result, a signaling session is established and voice communication is performed through the MGW.

8 is a flowchart illustrating a VoIP service procedure between a WiBro network and a PSTN according to an embodiment of the present invention.

Referring to FIG. 8, when a VolP service request message from a transmitting terminal to a receiving terminal of a wired telephone network is transmitted to a call processing control unit (S-CSCF) of IMS with a URI of a receiving terminal on a wired telephone network (801), HSS and ENUM Each server authenticates the transmitting terminal through the server and checks the SIP address of the receiving terminal (802).

Thereafter, the request message is converted into a wireline telephone network transmittable message by the media gateway (MGCF) and transmitted to the receiving terminal (S803). The receiving terminal converts the response message for the request message into a portable Internet transmission capable message in the media gateway and transmits the message to the transmitting terminal (804).

The receiving terminal further converts the message including the information of the handset reception into a portable Internet transmission capable message at the media gateway and transmits the message to the transmitting terminal to establish a signaling session (805).

9 is a diagram illustrating a VoIP service procedure between a mobile Internet (WiBro) network and a mobile communication network according to an embodiment of the present invention.

The procedure shown in the exemplary VoIP service procedure diagram between the WiBro and the mobile communication network will be briefly described below.

The PSS (transmission terminal) transmits the service request message to the P-CSCF (call processing control substitute) using the Tel URI. Then, the P-CSCF forwards the service request message to the S-CSCF (call processing control unit), and the S-CSCF performs the service authentication process of the PSS in association with the subscriber information server (HSS). This is performed by receiving service authentication result information from the HSS.

The S-CSCF forwards the Tel URI to the ENUM server (integrated identification number system server) to find the destination of the PSS. The ENUM server provides the S-CSCF with the SIP URI (address of MGCF / MGW) for the Tel URI.

S-CSCF delivers service request message to MGCF (media gateway), MGCF converts SIP message into ISUP message and delivers to SGW, and SGW delivers service request message to MSC (Mobile Switching Center) .

Therefore, the MSC finds the location of the called subscriber by interworking with the HLR of the mobile communication network to locate the called terminal, and then delivers the service request message to the mobile communication terminal, and the mobile communication terminal sends the response message containing the information of the call waiting. The MSC forwards the response message to the SGW.

The SGW forwards the response message to the MGCF, the MGCF converts the ISUP message into a SIP message, and forwards the response message to the S-CSCF. The S-CSCF forwards the response message to the P-CSCF and the P-CSCF to the PSS. Convey it.

The mobile terminal transmits a message (Answer message) containing information on the call initiation to the MSC, and the MSC delivers the Answer message to the SGW. The SGW then forwards the Answer message to the MGCF, which converts the ISUP message into a SIP message and forwards it to the S-CSCF. The S-CSCF delivers a 200 OK message to the P-CSCF, and the P-CSCF delivers a 200 OK message to the PSS.

As a result, a signaling session is established and actual voice communication is performed through the MGW.

10 is a flowchart illustrating a VoIP service procedure between a WiBro network and a mobile communication network according to an embodiment of the present invention.

Referring to FIG. 10, when a transmitting terminal transmits a VolP service request message from a transmitting terminal to a receiving terminal of a mobile telephone network to the call processing control unit (S-CSCF) of IMS (1001), an ENUM server is received after service authentication of a transmitting terminal through an HSS. The SIP address of the receiving terminal is checked through the 1002.

Subsequently, when the request message is converted from the media gateway (MGCF) into a mobile telephone network transmittable message and transmitted to the mobile switching center (MSC) (1003), the position of the receiving terminal of the mobile telephone network to be received is received by the mobile telephone switching center. After confirmation, the conversion message is transmitted to the receiving terminal (1004).

The response message of the receiving terminal with respect to the request message is converted into a portable Internet transportable message by the media gateway and transmitted to the transmitting terminal (1005).

In operation 1006, the message including the information indicating that the receiver terminal is picked up is converted into a portable Internet transmission capable message by the media gateway and transmitted to the transmitting terminal. As a result, a signaling session is established.

The invention can also be embodied as computer readable code on a computer readable recording medium. The computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is stored. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like, which are also implemented in the form of a carrier wave (for example, transmission over the Internet). It also includes. The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.

The best embodiments have been disclosed in the drawings and specification above. Although specific terms have been used herein, they are used only for the purpose of describing the present invention and are not used to limit the scope of the present invention as defined in the meaning or claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

The present invention introduces IMS to the control part of the core network to provide wired / wireless integrated service, and implements the network of all IP concept early by interworking IMS and the mobile Internet based on this, and through this, not only data service but also voice service (VoIP) ) Even in the form of guaranteed quality.

Claims (6)

(a) A VolP service request message (INVITE) including a URI (Uniform Resource Identifier) of a receiving terminal is transmitted from a transmitting terminal of a mobile Internet (WiBro) network to a call processing control unit (S-CSCF) of an IMS linked to the portable Internet network. Transmitting; (b) the call processing control unit authenticates the transmitting terminal through a subscriber information management server (HSS) and then converts a dial number into an Internet address system to the URI through an integrated identification number system server (ENUM server). Confirming a Session Initiation Protocol (SIP) address of the receiving terminal; (c) transmitting, by the call processing controller, the service request message to the receiving terminal using the SIP address; And (d) transmitting a response message for the service request message of the receiving terminal to the transmitting terminal via the call processing control unit; signaling for a VolP service in an IMS-based WiBro network; (Signaling) method. According to claim 1, The service request message of step (a) is transmitted to the call processing control unit (S-CSCF) via a call processing control substitution unit (P-CSCF) of IMS, The service request message of step (c) is transmitted from the call processing controller to the receiving terminal via a proxy call / session control function to which the receiving terminal belongs, The response message to the service request message of the receiving terminal of step (d) is transmitted to the transmitting terminal via the call processing control substitute unit to which the receiving terminal belongs and the call processing control unit, respectively. ) Signaling method for VolP service in network. (a) A call of an IMS linked to the portable internet network by a VolP service request message (INVITE) including a URI (Uniform Resource Identifier) of a receiving terminal of a wired telephone network interworking with the IMS in a transmitting terminal of a WiBro network; Transmitting to the processing controller S-CSCF; (b) the call processing control unit performs a service authentication of the transmitting terminal through a subscriber information management server (HSS) and then converts the dial number into an Internet address system through the integrated identification number system server (ENUM server). Confirming the SIP address of the receiving terminal for the; (c) converting the service request message into a message that can be transmitted from a wired telephone network through a media gateway (MGCF), which is an interworking server of the wired telephone network and the portable Internet, and transmitting the message to the receiving terminal; (d) converting a response message of the receiving terminal to the converted service request message into a response message transmittable through the media gateway to the transmitting terminal; (e) converting a message including information indicating that the receiver has received the handset to a message that can be transmitted from the portable Internet through the media gateway and transmitting the message to the terminal; Signaling method for VolP service in WiBro) network. The method of claim 3, wherein The service request message of step (a) is transmitted to the call processing control unit (S-CSCF) via a call processing control substitution unit (P-CSCF) of IMS, The response message of the receiving terminal of step (d) is converted into a response message that can be transmitted from the portable Internet, and then transmitted to the transmitting terminal through the call processing control unit and the call processing control substitution unit (P-CSCF), The message including the information indicating that the receiver of the receiving terminal is picked up in step (e) is converted into a response message that can be transmitted from the portable Internet, and then transmitted to the transmitting terminal through the call processing control unit and the call processing control substitution unit. Signaling method for VolP service in IMS based WiBro network. (a) A call of an IMS linked to the portable Internet network by a VolP service request message (INVITE) including a URI (Uniform Resource Identifier) of a mobile terminal connected to the IMS in a transmitting terminal of a WiBro network; Transmitting to the processing controller S-CSCF; (b) In the call processing control section, after the service authentication of the transmitting terminal is performed through the subscriber information management server (HSS), the URI is converted into an URI by an integrated identification number system server (ENUM server) that converts a dial number into an Internet address system. Confirming the SIP address of the receiving terminal; (c) converting the service request message into a message that can be transmitted from the mobile telephone network through a media gateway (MGCF), which is an interworking server of the mobile telephone network and the portable Internet, and transmitting the message to the mobile telephone switching center; (d) confirming a location of a receiving terminal of the mobile telephone network to be received at the mobile telephone switching center and delivering the converted message to a receiving terminal of the mobile telephone network; (e) converting a response message for the converted service request message of the receiving terminal into a response message transmittable through the media gateway to the transmitting terminal; (f) converting a message (Answer message) including information indicating that the receiver has received the handset to a response message that can be transmitted from the portable Internet through the media gateway, and transmitting the message to the transmitting terminal. Signaling method for VolP service in IMS based WiBro network. The method of claim 5, The service request message of step (a) is transmitted to the call processing control unit (S-CSCF) via a call processing control substitution unit (P-CSCF) of IMS, The response message of the receiving terminal of step (d) is converted into a response message that can be transmitted from the portable Internet, and then transmitted to the transmitting terminal through the call processing control unit and the call processing control substitution unit (P-CSCF), The response message including the information indicating that the receiver terminal has been picked up in step (e) is converted into a response message that can be transmitted from the portable Internet, and then transmitted to the transmitting terminal through the call processing control unit and the call processing control substitute unit. Signaling method for VolP service in IMS based WiBro network.

Images