KR100609712B1 - Method of linkage between WiBro network and IMS - Google Patents

Abstract

The present invention relates to a method of interworking a portable Internet (WiBro) network and an IP Multimedia Core Network Subsystem (IMS), and more particularly, to an IMS applicable as a core element of a portable Internet network and an integrated broadband network in a convergence environment of broadcasting and communication. This is a method for interworking with.

The interworking method disclosed herein comprises the steps of: (a) establishing a link between the mobile Internet network and the IMS by the mobile internet service provision request from the PSS; And (b) after determining whether a service which a user wants to use can be provided through the link through the requested portable Internet service, the use service is provided. Achieve the task

Description

Interworking method between mobile internet network and IMS {Method of linkage between WiBro network and IMS}

1 is a diagram showing the configuration of a mobile Internet service providing network.

2 is a diagram illustrating a configuration of an IMS of 3GGP / 3GPP2 to which the present invention is applied.

3 is a diagram illustrating a configuration of an interworking network between a mobile Internet network and an IMS.

4 is a diagram illustrating a preferred embodiment of an IMS interworking procedure with a portable Internet network.

The present invention relates to a method of interworking a portable Internet (WiBro) network and an IP Multimedia Core Network Subsystem (IMS), and more particularly, to an IMS applicable as a core element of a portable Internet network and an integrated broadband network in a convergence environment of broadcasting and communication. This is a method for interworking with.

Next-generation communication network is shifting its weight to broadband integrated network (BcN) for the integration of data network and voice network following the expansion of wired infrastructure due to the rapid spread of broadband internet. The implementation of wired / wireless integrated network linked with wireless Internet services such as CDMA2000 1x EV-DO service is a major issue.

Existing wireless internet services such as wireless LAN and CDMA2000 1x EV-DO have various problems in service coverage, transmission speed, and charges, and according to these problems, activation of wireless internet market is facing limitation in service provision. .

As a result, 2.3GHz portable Internet technology has emerged as a next-generation wireless Internet service that has the features of wide coverage, fast transmission speed, and low usage fee by supplementing the problems of the existing wireless Internet service. The 2.3GHz mobile Internet is emerging as a new revenue model by operators and manufacturers as a new growth engine for the IT industry in terms of integrated wired and wireless services.

Mobile Internet (WiBro) is a next-generation wireless Internet service that complements the problems of the existing wireless Internet service, and features wide coverage, fast transmission speed, and low usage fee, and newly uses 2.3GHz frequency band.

Broadband convergence network (BcN) is a next-generation converged network that enables high-quality broadband multimedia services anywhere and anytime in the information and communication environment of wired / wireless convergence and broadcasting convergence promoted by the Ministry of Information and Communication.

In addition, IMS (IP Multimedia Core Network Subsystem) is a sub-system of an all IP multimedia core network that is being standardized as a core network system of the next generation mobile communication system in 3GPP / 3GPP2. roaming).

Advances in digital technology are blurring the boundaries between broadcast and telecommunications services. Broadcast and communication services have various functions such as media environment, which was divided into broadcasting and communication, is rapidly becoming converged with broadcasting and communication based on the development of information and communication technologies such as digitization of multimedia contents, network digitization, and broadband. This is developing in a combined form.

As a result of the development of digital technology, the method of traditionally dividing information contents into voice, video, text, etc. becomes meaningless, and users can use the information integrally through a single media medium such as digital TV, PC, and mobile phone. As it became available, it became less important what information was and how it was organized.

On the contrary, the main consideration is whether users can access the information conveniently anytime and anywhere. Accordingly, unlike broadcasting and communication services that have been developed independently of each other, new services that are difficult to distinguish between broadcasting and communication are now appearing, and thus, it is necessary to activate the convergence service of broadcasting and communication.

The present invention has been made to meet the above background, and an object of the present invention and the technical problem to be achieved is to provide a large data service capable of multimedia services, which is one of the core elements of the mobile Internet network and the next-generation mobile communication network and global roaming The present invention provides an interworking method of IMS and a mobile Internet network that can provide a convergence service of broadcasting and communication through interworking with IMS.

In order to achieve the above object and technical problem, the linkage method disclosed in the present specification is

(a) establishing a link between the mobile Internet network and the IMS by a request for providing the mobile Internet service from the PSS; And

(b) after determining whether a service desired to be used by a user through the requested mobile Internet service can be provided through the link, and then providing the use service. To achieve.

The step of establishing a link between the portable Internet network and the IMS may include: (a1) requesting to provide a service that the user intends to use through the portable Internet from the PSS; (a2) negotiating radio link access and basic functions between the PSS and the RAS; (a3) if the negotiation is normally performed, requesting the RAS to interwork with the IMS in the operator IP network; (a4) the service provider IP network transmitting the request to a subsystem of the IMS, and the CSCF of the subsystem checks whether the PSS subscribes to a mobile Internet service according to a policy of PDF; (a5) after the PSS is confirmed whether to subscribe to the mobile Internet service, the CSCF performs a subscriber authentication and service authentication procedure; And (a6) acquiring an IPv6 home address and a home agent address if the authentication succeeds.

After determining whether a service that a user wants to use can be provided through the link through the requested portable Internet service, the step of providing the usage service may include (b1) the state of the portable Internet network and the IMS. Determining whether the used service is acceptable within a QoS request range according to; (b2) if available, providing the utilization service as QoS guaranteed; And (b3) if it is unacceptable, it comprises the step of providing a best effort service that does not guarantee QoS for the use service.

Hereinafter, in order to clarify the technical spirit of the present invention, the configuration and operation thereof will be described in detail with reference to the accompanying drawings based on the embodiments of the present invention. Although the same reference numerals have been given even in different drawings, it will be appreciated that components of other drawings may be cited when necessary in describing the drawings.

First of all, various terms will be summarized in order to facilitate understanding of the present invention, and then the configuration and operation of the present invention will be described.

WiBro: A combination of wireless and broadband, which means 2.3GHz mobile Internet.

BcN: Abbreviation for Broadband convergence Network, a broadband convergence network that accepts both wired, wireless and telecommunications broadcast services.

ACR: Abbreviation for Access Control Router.

RAS: Abbreviation for Radio Access Station.

PSS: Abbreviation for Portable Subscriber Station.

AAA: stands for Authentication, Authorization, Accounting.

HA: Home Agent FA: Foreign Agent

PE: Provider Edge router ER: Edge Router

NMS: Network Management System

1 is a diagram showing the configuration of a mobile Internet service providing network.

WiBro (WiBro) service is provided through a cellular network configuration in which broadband wireless transmission technology is applied in a 2.3 GHz frequency band, and employs a mobile internet protocol (MIP) to provide a service to a mobile terminal. The mobile terminal can be continuously provided with service even for movement between subnets (ER: between edge routers) by MIP. It also provides a simple IP service that cannot be moved between subnets. The configuration of the mobile Internet network will be briefly described.

The PSS 101 corresponds to a user terminal as a terminal point of a radio channel, and communicates with a Radio Access Station (RAS) 102 and an Orthogonal Frequency Division Modulation Access (OFDMA) system according to a radio access standard.

The RAS 102 connects the PSS 101 and the operator IP network 107 that provides the mobile Internet service. The RAS 102 controls the wireless channel according to the characteristics of each network, and is connected to the operator IP network 107 and connected to the PSS 101. 101 provides a wireless packet data service directly. The main functions of the RAS 102 are radio transmission and reception functions, packet traffic signal modulation and demodulation processing functions, protocol processing functions, and routing functions.

An access control router (ACR) 103 is connected to and manages multiple RASs, and performs a handover control function. To this end, the RAS 102 and the ACR 103 are interconnected based on the IP protocol, and are configured as Gigabit Ethernet switches for high speed transmission of packets.

The edge router 104 is a router that connects the operator IP network 107 and the portable Internet network to each other and is connected to several ACRs. Corresponding to the termination of the operator IP network 107, it can provide a mobile Internet service in conjunction with a high-speed Internet network or 3GPP / 3GPP2 network.

AAA (Authentication, Authorization, Accounting) server 105 is responsible for the authentication, authorization verification and billing of the mobile Internet service subscriber as an authentication server.

The home agent (HA) 106 performs a home agent function for providing a mobile IP service to the PSS 101.

The provider IP network 107 is a provider network that provides a mobile Internet service as an independent network of a communication provider. The provider IP network 107 may be independently established or additionally installed in an existing network (for example, a high speed internet network).

The edge router 108 is a router for interworking with the operator IP network 107 and the network of other providers.

2 is a diagram illustrating a configuration of an IMS of 3GGP / 3GPP2 to which the present invention is applied.

The evolution of All IP networks and services is based on the existing packet generation capability (PS Domain) of the 3rd generation network. This is due to the rapid deployment of new multimedia-based services and the formation of an IP-based open architecture and service platform that supports them. The goal is to introduce IP multimedia domains into the core network of telecommunications. The essence of the evolution of All IP networks and services is the upgrade of IP transport, but it is developed and developed as a concept with higher multimedia service applications, which is the concept of the IP Multimedia Service Domain.

Several years ago, 3GPP and 3GPP2, the international standardization organizations of 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. HRM).

The IMS configuration of 3GGP / 3GPP2 is briefly described.

The terminal 201 is a user terminal for receiving a wireless Internet service and performs internet access in a mobile communication network.

The access network 202 is composed of Radio Network Control (RNC), Serving GPRS Network (SGSN), and Gateway GPRS Network (GGSN) as a medium for providing a wireless Internet service to a terminal.

The IP network 203 is a network of other providers that are constructing IMS of 3GPP / 3GPP2.

Public Service Telephone Network (PSTN) / Public Land Mobile Network (PLMN) 204 represents a general fixed line telephone subscriber network or a wireless telephone subscriber network.

Subsystem 205 constituting the IMS is composed of nodes that perform various functions for implementing the IMS service, the brief description of the nodes are as follows.

1) Call Session Control Function (CSCF)

Call control function based on Session Initiation Protocol (SIP) to provide various multimedia services on an asynchronous 3G network. S-CSCF, I-CSCF, P-CSCF.

2) Home Subscriber Server (HSS)

It corresponds to the UMTS Universal Mobile Telecommunications System Home Location Register (HLR) and the Authentication Center (AuC), and all IP network subscriber information management (subscriber mobility management, user authentication information generation, service profile management, etc.).

3) MGCF (Media Gateway Control Function)

Control of various media gateways using the MEGACO / H.248 protocol (interworking with PSTN or other mobile communication systems, Class 4 Switching, Class 5 Switching).

4) MGW (Media GateWay)

Provide interworking with other network

5) MRFC (Media Resource Function Controller)

Media stream resource control function in the Media Resource Function Processor (MRFP).

6) Media Resource Function Processor (MRFP)

Media management and multiplexing capabilities.

7) Breakout Gateway Control Function (BGCF)

Control of calls routed to the PSTN or CS domain.

8) PDF (Policy Decision Function

General Packet Radio Service (GPRS) bearer authorization control function, QoS charging related function control function, gating function control function which is service-based policy.

Diffserv inter working control, RSVP admission control and inter working control.

9) Open Service Access-Service Capability Server (OSA-SCS)

The ability to provide an interface that facilitates the creation of new services using basic network functionalities.

10) Other

You can use Domain Name System (DNS) to resolve name-to-dress and Dynamic Host Configuration Protocol (DHCP) to obtain dynamic IP addresses.

TElephone NUmber Mapping (ENUM) DNS maps E.164 numbering and IP numbering.

3 is a diagram illustrating a configuration of an interworking network between a mobile Internet network and an IMS.

Referring to FIG. 3, the interworking network between the mobile internet network and the IMS includes a mobile internet network 301, an operator IP network 302, an operator IMS subsystem 303, a portable internet network 301, and an operator IMS subsystem 303. It consists of a management server 304 for performing various functions for the management of. The portable internet network 301 is interworked with the standardized operator IMS subsystem 303 of 3GPP / 3GPP2 via the operator IP network 302.

The management server 304 is a network management system (NMS: Network Management System (NMS) 3041) for managing the mobile Internet network 301 and the IMS subsystem 303, an HLR and AuC function for performing existing mobile subscriber management, and an All IP network. HSS 3042 that performs subscriber information management function, QoS manager 3043 that controls / manage Quality of Service (QoS) of information provided through interworking network, and DNS / ENUM server that performs DNS / ENUM function 3044. The function of each system or server is shown in Table 1.

Here, DNS is an abbreviation of Domain Name System. It is a system that manages domain names on the network. ENUM is an abbreviation of tElephone NUmber Mapping. It accepts E.164 phone numbers used in daily life as information identifiers in the Internet Domain Name System (DNS). This means that various communication connections such as telephone, email, homepage, and fax can be made with one ENUM number.

The interworking network between the mobile Internet network and IMS can also use the existing Internet network by interworking with the Public IP Network (305) and the PSTN / PLMN (306) through the IMS-MGW (3033), and the wired telephone network and wireless network. It can also work with a telephone network.

4 is a view showing a preferred embodiment of the IMS interworking procedure with the mobile Internet network, showing the flow of a preferred embodiment of the present invention.

The interworking procedure disclosed herein is performed after the link between the portable Internet network and the IMS is established by the mobile internet service provision request from the PSS (S41), and whether the requested portable internet service can be provided through the link. Is determined so that the requested service is provided (S42).

Link setting of the mobile Internet network and the IMS (S41) is the first, that is, when the PSS requests to provide the mobile Internet service to the RAS 102 in order to use the service to be provided through the mobile Internet (S411), PSS (101) Negotiation is performed between the RAS 102 and the radio link access and basic functions (S412). Here, the basic function is an initial cell selection process, and a function of synchronization and downlink parameter acquisition, uplink parameter acquisition, ranging and uplink parameter adjustment, and a terminal and an intermediate process of key exchange may provide a network function. Whether it is FEC level, authentication method, MIP / DHCP, etc.

If the negotiation is normally performed, the RAS 102 requests the operator IP network 107 to interwork with the IMS through the edge router 103 (S413). The operator IP network 107 forwards the request to the operator IMS subsystem 303, and the CSCF 3031, specifically P-CSCF, of the operator IMS subsystem 303 is configured as a PDF (Policy Decision Function, 3032). According to the policy, it is checked whether the corresponding PSS 101 subscribes to the mobile Internet service, that is, whether the PSS 101 is a mobile subscriber (S414). In this case, the policy specifically refers to an agreement or policy that provides differentiated services to subscribers of other operators according to interworking agreements with other network operators (for example, according to the agreement or policy related to network interworking between KTF and SKT). Policy to enable the provision of services by entering into service level agreements, etc.).

After checking whether the PSS 101 subscribes to the mobile Internet service, the P-CSCF 3031 performs the subscriber authentication and service authentication procedure with reference to the subscriber profile of the HSS 3042 for subscriber authentication ( S415). If authentication is successful, an IPv6 home address and a home agent address are obtained (S416). In case of applying IPv6, when the PSS 101 moves to another network, in order to provide a service to the PSS 101, the P-CSCF 301 (the current network that is currently located, that is, the current network that the PSS wants to receive) is PSS. It is necessary to obtain a home address and a home agent address of 101. Since the PSS 101 has moved, a service is provided through a home network to provide a service, so a home and a home agent address are required.

In S411 to S416, a link between the portable Internet network and the IMS is established (S41), and an environment for interworking is established.

Next, it is determined whether the requested portable Internet service can be provided through a link established between the portable Internet network and the IMS, and then the portable Internet service is provided (S42). Step S42 is a procedure of determining whether the QoS manager 3043 can guarantee and provide the QoS of the requested service that the subscriber wants to receive through the portable Internet, in consideration of the service profile of the portable Internet subscriber and the current network state.

The state of the IMS network and the state of the access network (portable Internet network) are managed by the QoS manager 3043. The state of the portable Internet network and the IMS determines whether the service requested by the subscriber is acceptable within the QoS request range. S421).

If it is acceptable, it provides the QoS guaranteed service in association with the charging management function of the HSS 3042 (S422). If it is unacceptable, after providing the guidance that only the Best Effort service that does not guarantee QoS can be provided, the BE service is provided (S423).

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, and may also be implemented in the form of a carrier wave (for example, transmission over the Internet). Include. 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.

So far I looked at the center of the preferred embodiment for the present invention. Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention.

Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the equivalent scope will be construed as being included in the present invention.

As described above, according to the present invention, the mobile Internet service is the WiBro service and the Internet phone among the eight new services of the IT 8-3-9 strategy of the Ministry of Information and Communication (8 new services, 3 advanced infrastructures, 9 new growth engines). (VoIP). 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. Thus, the mobile Internet will be the first test of the success of the IT 8-3-9 strategy.

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, 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 data service capable of multimedia services and global roaming, are currently interested in ITU-T's NGN standardization. In Korea, functional elements of IMS are actively discussed in the development of BcN standard model.

Therefore, when the IMS is introduced as the core of the BcN, the present invention implements the network of the All IP concept early by interworking the IMS and the mobile Internet, and thereby guarantees the quality of not only data services but also voice services (VoIP). It is suggested that it can be provided.

Claims (3)

(a) establishing a link between the mobile Internet network and the IMS by a request for providing the mobile Internet service from the PSS; And (b) after determining whether a service which a user wants to use through the requested portable Internet service can be provided through the link, and then providing the using service. The interworking method of the portable Internet network and the IMS, characterized in that the interworking of the portable Internet network and the IMS. The method of claim 1, wherein step (a) (a1) requesting to provide the service to be used through the portable Internet from the PSS; (a2) negotiating radio link access and basic functions between the PSS and the RAS; (a3) if the negotiation is normally performed, requesting interworking with the IMS from the RAS by the RAS; (a4) the service provider network transmitting the request to a subsystem of the IMS, and the CSCF of the subsystem checks whether the PSS subscribes to a mobile Internet service according to a policy of PDF; (a5) after the PSS is confirmed whether to subscribe to the mobile Internet service, the CSCF performs a subscriber authentication and service authentication procedure; And (a6) If the authentication is successful, the mobile Internet network and the IMS interworking method comprising the step of obtaining an IPv6 home address and a home agent address. The method of claim 1, wherein step (b) (b1) determining whether the service is acceptable within a QoS request range according to states of the portable Internet network and IMS; (b2) if available, providing the usage service as QoS guaranteed; And (b3) The interworking method of the mobile Internet network and the IMS, wherein the use service is provided as a Best Effort service which does not guarantee QoS if it cannot be accommodated.

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