KR20110011928A

KR20110011928A - System and method for providing circuit switching call service with wireless broadband terminal

Info

Publication number: KR20110011928A
Application number: KR1020090069405A
Authority: KR
Inventors: 김재범; 조진만
Original assignee: 주식회사 케이티
Priority date: 2009-07-29
Filing date: 2009-07-29
Publication date: 2011-02-09

Abstract

PURPOSE: A method and a system for providing a call service based on call switching with a Wibro terminal are provided to supply a voice or video call services through call switching, thereby providing an image of good quality or a voice call service to a Wibro subscriber. CONSTITUTION: An ACR(Access Control Router) checks whether service type information in an invite message is a voice or image service information or not(S303). A gateway maps the invite message as a setup message(S307). An MSC(Mobile Switching Center) transmits a paging signal to a receiving UMTS(Universal Mobile Telecommunications System) terminal(S309). The MSC transmits a video call request setup message to a receiving UMTS terminal(S313). The MSC receives a connect message from the receiving UMTS terminal(S323).

Description

Method and system for providing call service based on circuit switching to mobile terminal {SYSTEM AND METHOD FOR PROVIDING CIRCUIT SWITCHING CALL SERVICE WITH WIRELESS BROADBAND TERMINAL}

The present invention relates to a method and system for providing a circuit switched based call service to a mobile communication terminal connected to a Wibro (Wireless Broadband) network.

Today, due to the development of mobile communication services, subscribers of mobile communication terminals are provided with various services such as karaoke service, multimedia messaging service, and video call service in addition to the conventional voice call service. In addition, subscribers are provided with faster and more stable mobile communication services in accordance with the evolution of mobile communication networks.

One of such mobile communication networks is Wibro (Wireless Broadband) network. The Wibro network stably provides high-speed Internet service to mobile subscribers, and sets a lower rate than the wireless Internet rate of the UMTS (Universal Mobile Telecommunication System) network. Accordingly, subscribers can be provided with online games, video streaming services, and the like that require fast transmission speeds using mobile communication terminals supporting Wibro.

However, such a Wibro network has a narrower service area than that of the existing circuit switched network. In addition, although the Wibro network has strength in transmitting and receiving data, it does not reach the call quality provided in the circuit switched network in terms of voice or video call service. In other words, the Wibro network uses a packet switching scheme having strength in data transmission and reception, whereas the UMTS network uses a circuit switching scheme having strength in voice or video telephony services.

Due to the environment of a mobile communication network in which heterogeneous networks are distributed, technology researches for providing mobile communication services to subscribers by extracting only the strengths of each communication network are being actively conducted.

An object of the present invention is to provide a method and system for providing a voice or video call service to a Wibro terminal connected to a Wibro network using a circuit switching network having strengths in a voice or video call service.

Other objects and advantages of the present invention can be understood by the following description, and will be more clearly understood by the embodiments of the present invention. Also, it will be readily appreciated that the objects and advantages of the present invention may be realized by the means and combinations thereof indicated in the claims.

To provide a circuit-switching-based call service to a Wibro terminal connected to a Wibro network in a communication system including a circuit switching network, a Wibro network and a gateway connecting the two communication networks according to the first aspect of the present invention for achieving the above object. The method comprises the steps of: (a) the router of the Wibro network receiving a service request message from the Wibro terminal; (b) the router of the Wibro network transmitting the service request message to the gateway; (c) the gateway mapping the service request message to a circuit switched call establishment message of the circuit switched network; And (d) the gateway transmitting the mapped circuit switched call setup message to the switch of the circuit switched network.

According to a second aspect of the present invention, there is provided a system for providing a circuit-switched call service to a Wibro terminal connected to a Wibro network, including: a gateway for performing signal relay between a circuit-switched network and the Wibro network; And a router of a Wibro network for transmitting a service request message received from a Wibro terminal to the gateway, wherein the gateway maps the service request message to a circuit switched call setup message of the circuit switched network and the mapped circuit switched. The call establishment message is transmitted to the exchange of the circuit switched network.

The present invention has an advantage of providing a quality video or voice call service to Wibro subscribers by providing a voice or video call service through a circuit-switched network among services provided to the Wibro terminal.

The foregoing and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, in which: There will be. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram showing the configuration of a system for providing a circuit-switching-based call service to a Wibro terminal according to an embodiment of the present invention.

As shown in FIG. 1, a call service providing system according to an embodiment of the present invention includes a NodeB 220, a Radio Network Controller (RNC) 230, a Mobile Switching Center (MSC) 240, a Home Location Register (HLR), and the like. 250), a RAS (Radio Access Station) 320, an ACR (Access Control Router) 330, a location management server 340 and a gateway 400.

Here, NodeB 220, RNC 230, MSC 240 and HLR 250 is located in UMTS network 200, RAS 320, ACR 330 and location management server 340 is a Wibro network ( 300). In addition, the mobile communication terminals 210 and 310 may be dual band dual mode terminals capable of selecting and connecting any one of the UMTS network 200 and the Wibro network 300.

NodeB 220, which is a base station of UMTS network 200, performs wireless signal transmission, reception, wireless channel encoding and decoding, signal strength and quality measurement, baseband signal processing, radio resource management, and self maintenance.

The RNC 230 allocates and releases radio channels for the mobile communication terminal 210 connected to the UMTS network 200, controls the transmission output of the mobile communication terminal 210 and the NodeB 220, soft-off and soft handoff between cells. It performs off determination, transcoding and vocoding, and operation and maintenance functions for the NodeB 220.

The MSC 240 provides an interface with the RNC 230 and controls voice calls, data transmission and reception, and various additional services. In addition, the MSC 240 processes the call connection of the mobile communication terminal 210 connected to the UMTS network 200, and provides a connection function with another external network. In particular, the MSC 240 receives a request for location registration of the mobile communication terminal 310 connected to the Wibro network 300 from the gateway 400, and transmits the location information of the mobile communication terminal 310 to the HLR 250. To pass. In addition, when the MSC 240 receives the call connection request message from the mobile communication terminal 210 located in the UMTS network 200, the MSC 240 checks the type of the communication network to which the called terminal is connected through the HLR 250, and the called terminal. When the Wibro network 300 is connected, the call connection request message is transmitted to the gateway 400.

The HLR 250 stores and manages subscriber information, additional service information for each subscriber, and location information. In particular, the HLR 250 stores and manages the location information of the subscriber connected to the UMTS network 200 and the location information of the subscriber connected to the Wibro network 300.

The RAS 320 performs a function of managing and controlling a radio resource, a handoff support function, a packet authentication and a security function of a packet transmitted and received, and a quality of service (QoS) providing function.

The ACR 330 performs a function of routing a packet and controlling handover of the mobile communication terminal 310 generated between the RAS 320. In addition, the ACR 330 serves to deliver service usage data necessary for billing subscribers to a billing server (not shown). In particular, when a service request message is received from the mobile communication terminal 310 connected to the Wibro network 300, the ACR 330 checks the type of the service request message and if the message is a voice or video call request message, the gateway. The service request message is forwarded to 400.

The location management server 340 manages location information of the mobile communication terminal 310 connected to the Wibro network 300. In addition, the location management server 340 may allocate a dynamic mobile IP to the mobile communication terminal 310 connected to the Wibro network (300).

Preferably, the RAS 320, the ACR 330, and the location management server 340 support a Session Initiation Protocol (SIP) and transmit a SIP-based message to the mobile communication terminal 310 connected to the Wibro network 300. Communicate via

The gateway 400 connects the Wibro network 300 and the UMTS network 200 to each other and performs message conversion. That is, the gateway 400 maps the message received from the Wibro network 300 to a form commonly used in the UMTS network 200 and transmits the message to the UMTS network 200. Similarly, the gateway 400 maps the message received from the UMTS network 200 to a form commonly used in the Wibro network 300 and transmits the message to the Wibro network 300.

Hereinafter, a method of providing a circuit switching based call service to a Wibro terminal in a call service providing system according to the present invention will be described in detail with reference to FIGS. 2 to 4.

The mobile communication terminal 210 connected to the UMTS network 200 will be described by referring to the UMTS terminal 210 and the terminal connected to the Wibro network 300 as the Wibro terminal 310.

2 is a flowchart illustrating a method of performing location registration of a Wibro terminal in a call service providing system according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the ACR 330 receives a SIP-based register message, which is a location registration request message, from a Wibro terminal 310 located in the Wibro network 300 (S201). At this time, the register message includes the RAS 320 cell identification information of the Wibro network. Then, the ACR 330 transmits a register message including the cell identification information of the RAS 320 of the Wibro network to the location management server 340 (S203).

Next, the location management server 340 of the Wibro network 300 authenticates whether the Wibro terminal 310 is a terminal having a right authority, and if the authentication is successful, performs location registration of the Wibro terminal 310. (S205). Subsequently, if location registration succeeds normally, the location management server 340 transmits a 200 OK message to the ACR 330 in response (S207). Then, the ACR 330 transmits the 200 OK message to the Wibro terminal 310 and transmits a Register message to the gateway 400 in order to register the location of the Wibro terminal 310 which has been successfully authenticated in the UMTS network 200. (S209).

The gateway 400 receiving the register message maps the register message to a Location Update Request message commonly used in the UMTS network 200, and maps the mapped Location Update Request message to the MSC 240 of the UMTS network 200. It transmits (S211). That is, the gateway 400 converts a Register message, which is a SIP-based location registration request message, into a Location Update Request message, which is a DTAP (Direct Transfer Application Part) -based location registration request message, and transmits it to the MSC 240. Then, the MSC 240 transmits a Location Update Request message including the RAS 320 cell identification information of the Wibro terminal 310 to the HLR 250, and the HLR 250 based on the received Location Update Request message. Location registration of the Wibro terminal 310 is performed (S213 and S215).

In addition, the HLR 250 transmits a location update ack message indicating that the location registration of the Wibro terminal 310 was successfully performed to the gateway 400 via the MSC 240 (S217). Then, the gateway 400 maps the Location Update ack message to a SIP-based 200 OK message, and transmits the mapped 200 OK message to the ACR 330 (S219). In addition, the ACR 330 transmits a 200 OK message to the Wibro terminal 310 to notify that the location registration of the Wibro terminal 310 is normally completed (S221).

3 is a flowchart illustrating a method of providing a circuit switched based call service to a Wibro terminal in a call service providing system according to an embodiment of the present invention.

Referring to FIG. 3, the Wibro terminal 310 transmits a SIP-based Invite message to the ACR 330 to perform a video call with the UMTS terminal 210 according to a user's manipulation (S301). The Invite message is a message for establishing a session with another mobile communication terminal. The Invite message includes identification information of a caller, identification information of a called party, and requested service type information.

Then, the ACR 330 extracts service type information included in the Invite message and checks whether the service type information is voice or video call service information (S303). Subsequently, if the service type information included in the Invite message is voice or video call service information, the ACR 330 transmits the Invite message to the gateway 400 to provide a call service based on the UMTS network 300 ( S305). On the other hand, if the service type information included in the Invite message is a non-call service (for example, a presence service or a wireless Internet service), the ACR 330 uses the Wibro terminal 300 to configure the Wibro terminal ( 310 to provide the requested service.

Next, the gateway 400 maps the received SIP-based Invite message to a DTAP-based Setup message and transmits the mapped Setup message to the MSC 240 to establish a video call setup with the UMTS terminal 210. Request to the MSC 240 (S307).

Then, the MSC 240 obtains the location information of the terminating UMTS terminal 210 through the HLR 250, transmits a paging signal to the terminating UMTS terminal 210 based on the obtained location information, and receives a response accordingly. (S309, S311). Subsequently, the MSC 240 transmits a setup message requesting a video call to the destination UMTS terminal 210 and receives a Call Confirmed message corresponding to the response from the destination UMTS terminal 210 (S313 and S315). The setup message is a message for requesting a call progress based on the DTAP protocol specified in TS 24.008 of 3GPP. The setup message includes caller identification information and caller identification information.

Next, the MSC 240 receives an alerting message indicating that the call is in a waiting state from the destination UMTS terminal 210 and transmits it to the gateway 400 (S317 and S319). Then, the gateway 400 maps the received DTAP-based Alerting message to the SIP-based 180 Ringing message, and transmits the 180 Ringing message to the originating Wibro terminal 310 (S321).

When the called UMTS terminal 210 answers the call (ie, the caller operates the call connection button), the MSC 240 receives a Connect message from the called UMTS terminal 210 (S323). Subsequently, the MSC 240 transmits a Connect message to the gateway 400, and the gateway 400 maps the DTAP-based Connect message to a 200 OK message, which is a SIP-based call response message, and sends the 200 OK message to the originating Wibro. It transmits to the terminal 310 (S325, S327).

Negotiation is performed between the incoming UMTS terminal 210 and the originating Wibro terminal 310 for voice and video channel setting and codec setting according to the H.245 protocol, and the H.223 protocol is established between the two terminals 210 and 310. Video call accordingly proceeds.

Through this procedure, the subscriber of the Wibro terminal 310 performs a video call with the subscriber of the UMTS terminal 210 on a circuit exchange basis.

4 is a flowchart illustrating a method of providing a circuit switched based call service to a Wibro terminal in a call service providing system according to another embodiment of the present invention.

Referring to FIG. 4, the originating UMTS terminal 210 transmits a setup message for requesting a video call to the Wibro terminal 310 to the MSC 240 of the UMTS network 200 (S401). The setup message is a message for requesting a call progress based on the DTAP protocol specified in TS 24.008 of 3GPP. The setup message includes caller identification information and caller identification information.

Next, the MSC 240 transmits a Call Proceeding message, which means that the video call is set up, to the calling UMTS terminal 210, and the called terminal to the HLR 250 to establish a video call call with the Wibro terminal 310. (That is, Wibro terminal) requests and receives the location information (S405, S407). The MSC 240 recognizes that the called terminal is located in the Wibro network 300 based on the received location information of the called terminal. The MSC 240 transmits a setup message including the identification information of the called terminal to the gateway 400. It requests the call setup with the (S409).

Then, the gateway 400 maps the Setup message to the SIP-based Invite message and transmits the Invite message to the ACR 330 of the Wibro network 300 (S411). Next, the ACR 330 detects the location of the incoming Wibro terminal 310 through the location management server 340 of the Wibro network 300 and invite the incoming Wibro terminal 310 based on the identified location information. The message is transmitted (S413). The ACR 330 receives the 180 ringing message from the incoming Wibro terminal 310 in which the video call is set up and transmits the 180 ringing message to the gateway 400 (S415).

Then, the gateway 400 maps the SIP-based 180 ringing message received from the ACR 330 to the DTAP-based alerting message commonly used in the UMTS network 200, and maps the mapped alerting message of the UMTS network 200. The data is transmitted to the MSC 240 (S417). Next, the MSC 240 transmits an alerting message received from the gateway 400 to the calling UMTS terminal 210 (S419).

Thereafter, when the subscriber of the Wibro terminal 310 inputs a call button to request a connection for the video call, the incoming Wibro terminal 310 transmits a 200 OK message to the gateway 400 via the ACR 330. (S421). Then, the gateway 400 maps the SIP-based 200 OK message to a DTAP-based Connect message and transmits it to the MSC 240 of the UMTS network 200 (S423). Next, the MSC 240 transmits a Connect message to the originating UMTS terminal 210 (S425). Subsequently, a negotiation is performed between the calling UMTS terminal 210 and the called Wibro terminal 310 for setting up a voice and video channel and setting a codec, and after the negotiation is completed, a video call is performed between the two parties.

As described above, the present invention provides a voice or video call service among the services provided by the Wibro terminal 310 through the UMTS network 200 which is a circuit switched method. Accordingly, the subscriber of the Wibro terminal 310 may be provided with a high quality video or voice call service based on the UMTS network 200 having strengths in the call service.

In addition, the present invention by treating the Wibro network 300 as a kind of RNC 230 in the UMTS network 200, the hard handover (Hard) occurs when the subscriber moves between the UMTS network 200 and Wibro network (300) The quality of handover is also guaranteed.

Meanwhile, in the above-described embodiments, the circuit-based video call service is provided to the Wibro terminal 310, but those skilled in the art will provide the circuit-switching-based voice call service to the Wibro terminal 310 through the above-described embodiments. It is obvious that it can be provided. Accordingly, the present invention should be understood that circuit-switching-based call services include video call services and voice call services. In addition, various embodiments have been described using the UMTS network 200 and the Wibro network 300 as examples, but instead of the UMTS network 200, a Global System for Mobile Communications (GSM) network and a Code Division Multiple Access (CDMA) network are described. Any one of the circuit-switched networks may be adopted and applied to the present invention. Instead of the Wibro network 300, a mobile WiMAX (World Interoperability for Microwave Access) network may be adopted and applied to the present invention.

While this specification contains many features, such features should not be construed as limiting the scope of the invention or the claims. Also, the features described in the individual embodiments herein can be implemented in combination in a single embodiment. Conversely, various features described in a single embodiment herein can be implemented individually in various embodiments or in combination appropriately.

Although the operations are described in a particular order in the drawings, they should not be understood as being performed in a particular order as shown, or in a sequence of successive orders, or all described actions being performed to obtain a desired result. . In certain circumstances, multitasking and parallel processing may be advantageous. In addition, it should be understood that the division of various system components in the above-described embodiments does not require such division in all embodiments. The above-described program components and systems can generally be implemented as a single software product or as a package in multiple software products.

The method of the present invention as described above may be implemented as a program and stored in a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form. Since this process can be easily implemented by those skilled in the art will not be described in more detail.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

The following drawings, which are attached to this specification, illustrate exemplary embodiments of the present invention, and together with the detailed description of the present invention, serve to further understand the technical spirit of the present invention. It should not be construed as limited to.

220: NodeB 230: RNC

240: MSC 250: HLR

320: RAS 330: ACR

340: location management server 400: gateway

Claims

A communication system including a circuit switching network, a Wibro network, and a gateway connecting the two communication networks, provides a circuit switching-based call service to a Wibro terminal connected to a Wibro network.

(a) receiving, by the router of the Wibro network, a service request message from the Wibro terminal;

(b) the router of the Wibro network transmitting the service request message to the gateway;

(c) the gateway mapping the service request message to a circuit switched call establishment message of the circuit switched network; And

(d) transmitting, by the gateway, the mapped circuit switched call setup message to an exchange of the circuit switched network.

The method of claim 1,

Before step (b) above,

Determining, by the router of the Wibro network, the type of the service request message;

In step (b), the router of the Wibro network transmits the service request message to the gateway when the service request message is a voice or video call call setup request message. To provide call services to your organization.

The method according to claim 1 or 2,

Before step (a),

Receiving, by the router of the Wibro network, a location registration request message including cell identification information of the Wibro network from a Wibro terminal and transmitting the received location registration request message to the circuit switched network; And

And registering the location information of the Wibro terminal by the location register of the circuit switched network.

The method according to claim 1 or 2,

After step (d),

Receiving, by the gateway, an Alling message from the exchange of the circuit switched network in response to the call establishment message; And

Mapping, by the gateway, the alling message to a ring message of a Wibro network, and transmitting the mapped ring message to the Wibro terminal through a router of the Wibro network; Method of providing a call service based on circuit switching to a terminal.

A system for providing a circuit switching based call service to a Wibro terminal connected to a Wibro network,

A gateway for performing signal relay between a circuit switched network and the Wibro network; And

A router of a Wibro network for transmitting a service request message received from a Wibro terminal to the gateway;

The gateway maps the service request message to a circuit switched call setup message of the circuit switched network, and transmits the mapped circuit switched call setup message to a switch of the circuit switched network. Call service provision system.

The method of claim 5,

The router of the Wibro network,

When the service request message is a voice or video call call setup request message by determining the type of the service request message, the service request message based circuit switched to the Wibro terminal, characterized in that for transmitting to the gateway. .

The method according to claim 5 or 6,

When registering the location of the Wibro terminal, the location register of the circuit switched network for receiving and storing the cell identification information of the Wibro network in which the Wibro terminal is transmitted from the router of the Wibro network through the gateway; Circuit switching based call service providing system to Wibro terminal.

The method according to claim 5 or 6,

The gateway,

In response to the call establishment message, an allerting message received from an exchange of the circuit switched network is mapped to a ring message of a Wibro network, and the mapped ring message is mapped to the Wibro network through a router of the Wibro network. Circuit switching based call service providing system to a Wibro terminal, characterized in that the transmission to the terminal.