KR20130140442A

KR20130140442A - Method for providing communication service by caller selecting called network and apparatus therefor

Info

Publication number: KR20130140442A
Application number: KR1020120063847A
Authority: KR
Inventors: 금기섭
Original assignee: 주식회사 케이티
Priority date: 2012-06-14
Filing date: 2012-06-14
Publication date: 2013-12-24

Abstract

The present invention relates to a method for providing a communication service through a destination network selected by a caller and an apparatus for the same. According to the present invention, the method for providing a communication service through a destination network selected by a caller in an IP multimedia subsystem (IMS) communicating through multiple heterogeneous access networks comprises: a request reception step for receiving a request for a communication service from a calling terminal to a receiving terminal; a network identification step for identifying multiple heterogeneous access networks to which the receiving terminal is being connected; a list transmission step for transmitting a list of the identified heterogeneous access networks to the calling terminal; a receiving network setup step for receiving, from the calling terminal, the selection of one access network recorded in the list of the heterogeneous access networks and setting the selected access network to a destination network for communication service; and a session formation step for forming a session with the receiving terminal via the set destination network. [Reference numerals] (AA) Calling terminal;(BB) LTE network;(CC) Receiving terminal;(S503) Identify networks to which the receiving terminal is being connected;(S505) List of the networks;(S507) Output the list of the networks;(S509) Network selection information;(S511) Setting a destination network;(S521) Setting a session

Description

METHOD FOR PROVIDING COMMUNICATION SERVICE BY CALLER SELECTING CALLED NETWORK AND APPARATUS THEREFOR}

The present invention relates to a method for providing a communication service through a called network selected by a caller, and more particularly, when a caller selects a specific called network from among a plurality of called networks, the caller terminal and the called terminal use the selected called network. A communication service providing method for forming a session and an apparatus therefor.

Due to the development of mobile communication network, voice, audio, video based on IP protocol. An IP Multimedia Subsystem (IMS) has been developed that provides a combination of multimedia and the like. IMS is compatible with other communication networks, can provide various contents at the same time, and is easy to scale. The following document discloses a method for controlling a multimedia session using IMS.

Meanwhile, as various communication networks are established today, a multi-band multi-mode terminal supporting a plurality of communication modes in one mobile communication terminal has been developed, and subscribers use different mobile communication terminals. It is possible to selectively connect to any one of a plurality of mobile communication networks. For example, users can use a multiband multimode terminal connected to either a wideband code division multiple access network (WCDMA) network or a long term evolution network (LTE). When the user wants to talk, he / she can access a WCDMA network and receive a mobile communication service.

However, the IMS registers a multiband multimode terminal through only one communication network. For example, when a multiband multimode terminal moves from a WCDMA network to a place where a WCDMA network and a WiFi network overlap, the IMS releases the terminal registration for the WCDMA network and newly generates the terminal registration information for the WiFi network. Save it. However, this method is forcing the user to select only one communication network, which acts as a problem of lowering the user's service satisfaction.

Korean Laid-Open Patent Publication 10-2011-0028970

The present invention has been proposed to solve such a conventional problem, and stores a registration key for a plurality of heterogeneous access networks to which a mobile terminal can access, in a plurality of heterogeneous access networks to which a caller is connected. It is an object of the present invention to provide a method and apparatus for providing a communication service for establishing a session between a calling terminal and a called terminal through the selected access network when a specific access network is selected.

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. It will also be readily apparent that the objects and advantages of the invention may be realized and attained by means of the instrumentalities and combinations particularly pointed out in the appended claims.

A method of providing a communication service using a called network selected by a caller in an IMS (IP Multimedia Subsystem) which communicates a plurality of heterogeneous access networks according to the first aspect of the present invention for achieving the above object, from a calling terminal to a called terminal Receiving a request for requesting a communication service; Confirming a plurality of heterogeneous access networks to which the called terminal is connected; Transmitting a list of the identified heterogeneous access networks to the calling terminal; A receiving network setting step of selecting an access network recorded in the heterogeneous access network list from the calling terminal and setting the selected access network as a receiving network for a communication service; And a session establishment step of forming a session with the called terminal via the set called network.

In order to achieve the above object, a method of providing a communication service using an incoming network selected by a caller in an IMS (IP Multimedia Subsystem) for communicating a plurality of heterogeneous access networks according to the second aspect of the present invention is provided. Receiving access network information of a second mobile communication terminal; Setting the second mobile communication terminal as an access network confirmation target terminal and monitoring whether a registration key is received from the second mobile communication terminal; When one or more registration keys are received from the second mobile communication terminal as a result of the monitoring, each heterogeneous access network to which the second mobile communication terminal is connected is identified and the list of the identified heterogeneous access networks is determined. Transmitting to a mobile communication terminal; Receiving, from the first mobile communication terminal, a communication service request message in which identification information of a specific access network selected from the list of heterogeneous access networks is recorded and identification information of the second mobile communication terminal is recorded as destination information; Setting an access network corresponding to the identification information of the access network recorded in the communication service request message as a destination network; And establishing a session with the second mobile communication terminal via the set incoming network.

The session control apparatus according to the third aspect of the present invention for achieving the above object, the storage unit for storing the connection information for each mobile communication terminal; A receiving unit for requesting a communication service from a calling terminal to a called terminal; An access network confirming unit for checking a plurality of heterogeneous access networks to which the called terminal is connected in the storage unit, and transmitting the checked heterogeneous access networks to the calling terminal; And if the access network recorded in the heterogeneous access network is selected from the calling terminal, set the selected access network as a destination network for a communication service, and establish a session with the called terminal via the set destination network. And a session forming unit to form.

According to another aspect of the present invention, there is provided a session control apparatus, including: a receiving unit requesting access network information of a second mobile communication terminal from a first mobile communication terminal; Set the second mobile communication terminal as an access network confirmation target terminal, monitor whether a registration key is received from the second mobile communication terminal, and if one or more registration keys are received from the second mobile communication terminal, the registration is performed. An access network identification unit for identifying each heterogeneous access network to which the second mobile communication terminal is connected based on a key, and transmitting the checked list of heterogeneous access networks to the first mobile communication terminal; And receiving, from the first mobile communication terminal, a communication service request message in which identification information of a specific access network selected from the list of heterogeneous access networks is recorded and identification information of the second mobile communication terminal is recorded as destination information. And a session forming unit configured to set the access network corresponding to the identification information of the specific access network as the destination network and form a session with the second mobile communication terminal via the destination network.

The present invention has the advantage of improving the communication service satisfaction of the user by allowing the caller to select the destination network for the communication service in consideration of the communication environment, such as the caller's communication plan, terminal performance.

In particular, the present invention has the effect of reducing the communication charge of the sender, which is the subject of the charge, because the sender sets the selected access network as the called network and transmits data to the called terminal using the called network.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the principles of the invention. And shall not be construed as limited to such matters.
1 is a diagram illustrating a configuration of a communication system for providing a communication service using a called network selected by a caller according to an embodiment of the present invention.
2 is a diagram illustrating a configuration of a CSCF according to an embodiment of the present invention.
3 is a diagram illustrating a registration table according to an embodiment of the present invention.
4 is a flowchart illustrating a method of storing a registration key of a mobile communication terminal in an IMS according to an embodiment of the present invention.
5 is a flowchart illustrating a method of establishing a session with a called terminal by using a called network selected by a caller in an IMS according to an embodiment of the present invention.
6 is a flowchart illustrating a method for establishing a session with a called terminal by using a called network selected by a caller in an IMS according to another embodiment of the present invention.

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 illustrating a configuration of a communication system for providing a communication service using a called network selected by a caller according to an embodiment of the present invention.

As shown in FIG. 1, a communication system according to an embodiment of the present invention includes a mobile communication network 200 including a plurality of heterogeneous access networks and an IMS network 300 providing a multimedia-based communication service.

The mobile communication network 200 includes a base station, a base station controller, a switch, and the like, and is responsible for processing a communication service for the mobile communication terminals 110 and 120. In particular, the mobile communication network 200 includes a plurality of heterogeneous accesses, such as a wideband code division multiple access network (WCDMA) network 210, a long term evolution network 220, and a wireless fidelity network 230. Each heterogeneous access network 210, 220, 230 includes a network, and includes one or more of a base station, a base station controller, and a switch according to a standard of a corresponding communication network. That is, the WCDMA network 210 includes a NodeB, a base station controller (BSC) and a mobile switching center (MSC), and the LTE network 220 includes an evolved nodeB (e-NodeB) and a mobility management entity (MME). Wifi network 230 includes a micro base station connected to a broadband wired and wireless communication network. Although not shown in FIG. 1, the mobile communication network 200 may further include other heterogeneous access networks such as a Wibro network and a High Speed Downlink Packet Access network.

After connecting to the mobile communication network 200, the mobile communication terminals 110 and 120 receive a mobile communication service. In particular, the mobile communication terminal (110, 120) after transmitting the registration key to the CSCF (Call Session Control Function) 400 of the IMS network 300, and informs the IMS network 300 of its access information, IMS network The IP-based multimedia service is provided from 300. At this time, the mobile communication terminal (110, 120) is a registration key recording the PUID (Public User ID), PRID (PRivate User ID), IP address, port number and the current access network identification information of the IMS network 300 Send to CSCF (400). On the other hand, if the mobile communication terminal (110, 120) is a multi-band multi-mode terminal, after searching all the heterogeneous access network (210, 220, 230) that can be accessed from the current location, each heterogeneous access network (210, A registration key for the 220 and 230 is generated and transmitted to the CSCF 400 of the IMS network 300.

The CSCF 400 is a call session control device that establishes a session with the mobile communication terminals 110 and 120 and performs a function of providing a communication service to the mobile communication terminals 110 and 120 through the session. In particular, the CSCF 400 communicates with the mobile communication terminals 110 and 120 through a Session Initiation Protocol (SIP) based message. This CSCF 400 includes a Proxy-CSCF (P-CSCF), an Interrogating-CSCF (I-CSCF), and a Serving-CSCF (S-CSCF).

In addition, the CSCF 400 receives and stores the registration key from the mobile communication terminals 110 and 120 to grasp the connection information of the mobile communication terminals 110 and 120. In particular, the CSCF 400 sets the access network (210, 220, 230) specified by the caller to the destination network, and establishes a session for the communication service with the called terminal using the set destination network. Specifically, the CSCF 400 provides the heterogeneous access network list to which the called terminal is connected to the calling terminal, sets the receiving network to the heterogeneous access network selected by the calling terminal, and establishes a connection with the called terminal via the set called network. Set.

In the following description with reference to FIGS. 2 to 6, the mobile communication terminal of FIG. 1 is assumed to be the calling terminal 110, and the mobile communication terminal of 120 of FIG. 1 is the called terminal 120.

2 is a diagram illustrating a configuration of a CSCF according to an embodiment of the present invention.

As shown in FIG. 2, the CSCF 400 according to an embodiment of the present invention includes a transceiver 410, a storage 420, a registration processor 430, an access network checker 440, and a session forming unit. (450).

The transceiver 410 is connected to a plurality of heterogeneous access networks 210, 220, and 230 distributed in the mobile communication network 200, respectively, and performs a function of communicating with each heterogeneous access network 210, 220, or 230. Preferably, the transceiver 410 communicates with the plurality of heterogeneous access networks 210, 220, 230 using SIP-based messages.

The storage unit 420 stores a registration table for recording a registration key for each of the mobile communication terminals 110 and 120.

3 is a diagram illustrating a registration table according to an embodiment of the present invention.

As shown in FIG. 3, the registration table of the storage unit 420 according to an embodiment of the present invention includes a PRID field 31, a PUID field 32, an access network field 33, and an IP / Port field 34. The registration key mapped with) is recorded. In each of the PRID field 31 and the PUID field 32, PRID and PUID of the mobile communication terminals 110 and 120 are recorded. The PRID is identification information of the mobile communication terminals 110 and 120 used as authentication information of the terminal, and the PUID is identification information of the mobile communication terminals 110 and 120 used to route incoming calls in the IMS network 300. In addition, in the access network field 33, identification information of the access networks 210, 220, and 230 to which the mobile communication terminals 110 and 120 are connected is recorded. In the IP / Port field 34, the access network 210, IPs and port numbers of the mobile communication terminals 110 and 120 used when communicating with 220 and 230 are recorded.

Meanwhile, when the mobile communication terminals 110 and 120 are multi-band multi-mode terminals, a plurality of registration keys for the mobile communication terminals 110 and 120 may be recorded in the registration table of the storage unit 420. For example, referring to FIG. 3, the registration table of the storage unit 420 has a registration key for the mobile communication terminals 110 and 120 having PRID of 'PRID-1' and PUID of 'PUID-1'. According to the registration table, the mobile communication terminals 110 and 120 are connected to the WCDMA network 210, the LTE network 220, and the Wifi network 230, respectively.

When the registration processing unit 430 receives the registration keys of the mobile communication terminals 110 and 120 through the transmission and reception unit 410, the registration processing unit 430 records the registration keys in the registration table of the storage unit 420, thereby allowing the mobile communication terminal 110 to receive the registration keys. The access information of the server 120).

When the access network confirming unit 440 receives a request for access network confirmation of the terminating terminal 120 from the session forming unit 450, the terminating terminal 120 accesses based on the registration key recorded in the registration table of the storage unit 420. Extract one or more access networks 210, 220, and 230, and transmit the extracted access network list to the calling terminal 110 using the transceiver 410. In addition, when the access network confirming unit 440 receives the real-time access network information of the second mobile communication terminal 120 from the first mobile communication terminal 110, the second mobile communication terminal 120 is an access network confirmation target. After setting as a terminal, it is monitored whether a registration key of the second mobile communication terminal 120 is newly recorded or updated in the registration table of the storage unit 420, and based on the registration key when the registration key is recorded or updated. The second mobile communication terminal 120 may check a list of access networks 210, 220, and 230 that are being accessed, and transmit the list to the first mobile communication terminal 110.

The session forming unit 450 forms and controls sessions of the mobile communication terminals 110 and 120. Particularly, when the SIP-based Invite message, which is a call setup request message, is received from the mobile communication terminals 110 and 120, the session forming unit 450 stores whether the registration key of the called terminal 120 is plural. If it is checked in the registration table of the singular, the access network recorded in the registration key of the terminating terminal 120 is set as the terminating network, and the Invite message is transmitted to the terminating network. On the other hand, if a plurality of registration keys of the called terminal 120 are recorded in the registration table of the storage unit 420, the session forming unit 450 accesses the called terminal 120 to the access network checking unit 440. Request network verification. In addition, when the session forming unit 450 receives the access network selection information from the calling terminal 110 through the transceiver 410, the access network 210, 220, 230 selected by the calling terminal 110 is called as the called network. After setting, and transmitting the Invite message to the set called network by using the transceiver 410, and forms a session between the calling terminal 110 and the called terminal 120 using the called network.

On the other hand, when the session forming unit 450 receives the Invite message in which the access network identification information is recorded through the transceiver unit 410, the session forming unit 450 receives the Invite message through the incoming network corresponding to the access network identification information recorded in the Invite. By transmitting to the terminal 120, a session may be established between the calling terminal 110 and the called terminal 120 using the called access network selected by the caller.

4 is a flowchart illustrating a method of storing a registration key of a mobile communication terminal in an IMS according to an embodiment of the present invention.

In the description with reference to FIG. 4, it is assumed that the mobile communication terminals 110 and 120 are multiband multimode terminals.

Referring to FIG. 4, after activating all the heterogeneous network modules (eg, modems) mounted on the mobile communication terminals 110 and 120, the radios of the heterogeneous access networks 210, 220, and 230 are connected through respective heterogeneous network modules. By checking whether a signal is received, search for a plurality of heterogeneous access networks 210, 220, and 230 accessible at the current location (S401). Subsequently, when one or more heterogeneous access networks 210, 220, and 230 are searched, the mobile communication terminals 110 and 120 access each heterogeneous access network 210, 220, and 230, and then each heterogeneous access network 210, A registration key is generated for each of 220 and 230 (S403). At this time, each of the registration keys of the mobile communication terminal (110, 120), its own PRID, PUID, identification information of the heterogeneous access network (210, 220, 230), which is used in the heterogeneous access network (210, 220, 230) Record the IP address and port number in the corresponding registration key.

Next, the mobile communication terminal (110, 120) transmits the SIP-based Register message recorded with the generated registration key to the CSCF (400) of the IMS network (300) via the mobile communication network (200), IMS network Request for registration (300) (S405). At this time, the mobile communication terminal (110, 120) after recording all of the plurality of registration keys in one Register message, any one of the plurality of heterogeneous access network (210, 220, 230) retrieved from the current location (210, 220) 230 may transmit the register message to the CSCF 400. Alternatively, the mobile communication terminals 110 and 120 create a plurality of register messages in which one registration key is recorded, and then send the plurality of register messages through the heterogeneous access networks 210, 220, and 230 to the CSCF 400. Can also be sent. For example, when the mobile communication terminals 110 and 120 access all of the WCDMA network 210, the LTE network 220, and the Wifi network 230 at the current location, each of the heterogeneous access networks 210, 220, and 230 are connected. After generating the registration key for each of the three register messages, each registration key is recorded one by one, and the register message via each of the WCDMA network 210, LTE network 220, Wifi network 230 CSCF ( By distributing to 400, three Register messages may be transmitted to the CSCF 400 as a result.

Then, the transceiver 410 of the CSCF 400 receives one or more Register messages, and the registration processing unit 430 extracts a registration key recorded in one or more Register messages, and stores the registration key in the storage unit 420. By recording in the registration table, the connection information of the mobile communication terminals 110 and 120 is stored (S407). At this time, when a plurality of registration keys are recorded in one register message, the CSCF 400 extracts all of the plurality of registration keys and records them in the registration table of the storage unit 420. In addition, when receiving a plurality of register messages from the mobile communication terminals 110 and 120, the CSCF 400 extracts each registration key recorded for each register message and records the registration key in the registration table of the storage unit 420. Preferably, the CSCF 400 checks the access network identification information recorded in each registration key, and the registration key of the mobile communication terminals 110 and 120 having the same information as the access network identification information is stored in the storage unit 420. If already stored in the registration table, the registration key stored in the registration table is updated with the registration key received from the mobile communication terminal (110, 120), thereby maintaining the latest information on the connection information of the mobile communication terminal (110, 120).

5 is a flowchart illustrating a method of establishing a session with a called terminal by using a called network selected by a caller in an IMS according to an embodiment of the present invention.

Referring to FIG. 5, the calling terminal 110 transmits an Invite message, which is a call setup request message, to the CSCF 400 of the IMS network 300 via the access networks 210, 220, and 230 to which it is connected ( S501). The PUID of the calling terminal 110 and the PUID of the called terminal 120 are recorded in the Invite message.

Then, the session forming unit 450 of the CSCF 400 checks the PUID of the called terminal 120 in the Invite message, and stores the storage unit 420 whether there are a plurality of registration keys having the PUID of the called terminal 120. Check in the registration table. Subsequently, when only one registration key of the called terminal 120 is recorded in the registration table of the storage unit 420, the session forming unit 450 of the CSCF 400 accesses the access recorded in the registration key of the called terminal 120. The network is set as the destination network, and the transceiver 410 is used to transmit an Invite message to the set destination network.

On the other hand, if the registration key of the terminating terminal 120 is recorded in a plurality of numbers in the registration table of the storage unit 420, the session forming unit 450 is connected to the access network identification unit 440 of the terminating terminal 120. Request access network verification. Then, the access network checking unit 440 extracts a plurality of registration keys having the PUID of the called terminal 120 from the registration table of the storage unit 420, and checks the access network identification information recorded for each extracted registration key. (S503). That is, the access network identification unit 440 is one or more heterogeneous access networks 210, 220, 230 to which the terminating terminal 120 is connected based on the registration key of the terminating terminal 120 recorded in the registration table of the storage unit 420. ). Subsequently, the access network identification unit 440 transmits the access network list in which the identified heterogeneous access network identification information is listed to the calling terminal 110 using the transceiver 410 (S505).

Then, the calling terminal 110 outputs the access network list to which the called terminal 120 is connected to the screen, and receives any one of the access networks listed in the access network list from the caller (S507). The originating terminal 110 transmits the access network selection information in which the identification information of the access network selected by the sender is recorded to the CSCF 400 of the IMS network 300 (S509). In the description with reference to FIG. 5, the caller selects the LTE network 220.

Next, the session forming unit 450 of the CSCF 400 receives the access network selection information through the transceiver unit 410 and checks the access network identification information recorded in the access network selection information, thereby making the access selected by the caller. Recognize the network. Next, the session establishment unit 450 sets an access network corresponding to the access network identification information as a destination network (ie, LTE network), and then uses the transceiver 410 to set the access network (ie, LTE). Network) so that the Invite message arrives at the destination terminal 120 via the selected destination network (i.e., LTE network) (S511, S513). At this time, the session forming unit 450 checks the IP, the port number and the PUID of the terminating terminal 120 from the registration key of the terminating terminal 120 in which the LTE network 220 is recorded as access network identification information. The SIP-based message (Invite, ACK, etc.) is routed to the called terminal 120 using the received information.

Next, when the session forming unit 450 receives a 180 ringing message from the called terminal 120 indicating that the telephone ring of the called terminal 120 is being output through the called network (ie, LTE network), the 180 ringing message is received. Send to the calling terminal 110 (S515). Subsequently, when a 200 OK message is received from the called terminal 120 indicating that the call connection is accepted through the called network (ie, LTE network), the session forming unit 450 sends the 200 OK message to the calling terminal 110. It transmits (S517). When the ACK message is received from the calling terminal 110 through the transmitting / receiving unit 410, the session forming unit 450 sends the ACK message to the called terminal 120 via the LTE network 220, which is the called network selected by the caller. It transmits (S519). The session forming unit 450 forms a session between the calling terminal 110 and the called terminal 120 by using the LTE network 220 which is the called network designated by the calling terminal 110, and establishes a session with the caller through the formed session. The call is carried out between the called parties (S521).

6 is a flowchart illustrating a method for establishing a session with a called terminal by using a called network selected by a caller in an IMS according to another embodiment of the present invention.

Referring to FIG. 6, the mobile communication terminal 110 of FIG. 1 is referred to as a first mobile communication terminal 110 and the mobile communication terminal 120 of FIG. 1 is referred to as a second mobile communication terminal 120. In addition, in the description with reference to FIG. 6, portions overlapping with FIG. 5 will be compressed and summarized.

Referring to FIG. 6, the first mobile communication terminal 110 requests SIP real-time access network information of the second mobile communication terminal 120 via the access networks 210, 220, and 230 to which it is connected. The Subscribe message is transmitted to the CSCF 400 of the IMS network 300 (S601). The PUID of the second mobile communication terminal 120 is recorded in the Subscribe message.

Then, the transceiver unit 410 of the CSCF 400 receives the Subscribe message, and the access network checking unit 440 of the CSCF 400 detects the second mobile communication terminal 120 having the PUID recorded in the Subscribe message. It is set as an access network confirmation target terminal and continuously monitors whether the registration key of the second mobile communication terminal 120 is recorded or updated in the registration table of the storage unit 420.

Next, the second mobile communication terminal 120 generates a registration key for the plurality of heterogeneous accesses 210, 220, and 230 found at the current location, and then registers a register message in which the registration key is recorded. To transmit (S603).

Then, the registration processing unit 430 of the CSCF 400 extracts the registration key recorded in the Register message and records the registration key in the registration table of the storage unit 420, thereby connecting the second mobile communication terminal 120. The information is stored (S605). Next, the access network checking unit 440 detects that the registration key of the second mobile communication terminal 120 set as the access network checking target terminal is recorded in the registration table of the storage unit 420, and thus, the second mobile communication. At least one registration key having the PUID of the terminal 120 is extracted from the registration table of the storage unit 420, and the access network identification information recorded in each extracted registration key is checked (S607). That is, the access network checking unit 440 is one or more heterogeneous access networks to which the second mobile communication terminal 120 is connected based on the registration key of the second mobile communication terminal 120 recorded in the registration table of the storage unit 420. Check (210, 220, 230). Subsequently, the access network confirming unit 440 receives the SIP-based Notify message in which the access network identification information of the checked second mobile communication terminal 120 is recorded using the transmitting and receiving unit 410. To transmit (S609).

Then, the first mobile communication terminal 110 extracts the access network identification information from the Notify message and outputs it to the screen, and receives one of the output access network identification information from the user (S611). In the description with reference to FIG. 6, it is described that the caller selects the Wifi network 230. Subsequently, the first mobile communication terminal 110 records the access network identification information selected by the user and sends an Invite message in which the PUID of the second mobile communication terminal 120 is recorded as the called terminal information. 400) (S613).

Next, the transceiver unit 410 of the CSCF 400 receives the Invite message, and the session forming unit 450 extracts the access network identification information recorded in the Invite message and corresponds to the extracted access network identification information. An access network (ie, a WiFi network) is set as a called network (S615). Subsequently, the session forming unit 450 transmits the Invite message to the set called network (i.e., WiFi network) by using the transceiver 410, so that the Invite message is selected by the sender. The second mobile communication terminal 120, which is the called terminal 120, is arrived at via S617.

Next, when the session forming unit 450 receives the 180 ringing message from the second mobile communication terminal 120 through the Wifi network 230, the session forming unit 450 transmits the 180 ringing message to the first mobile communication terminal 110 ( S619). Subsequently, when the session forming unit 450 receives the 200 OK message through the Wifi network 230 as the destination network, the session forming unit 450 transmits the 200 OK message to the first mobile communication terminal 110 (S621). When the ACK message is received from the first mobile communication terminal 110, which is the calling terminal 110, through the transmitting and receiving unit 410, the session forming unit 450 via the Wifi network 230 which is the called network selected by the caller. The ACK message is transmitted to the second mobile communication terminal 120 (S623). The session forming unit 450 establishes a session between the first mobile communication terminal 110 and the second mobile communication terminal 120 using the Wifi network 230 designated by the first mobile communication terminal 110 as a destination network. Form the call and make a call between the caller and the called party through the formed session (S625).

As described above, the present invention improves the user's communication service satisfaction by allowing the sender to select a destination network for the communication service in consideration of the communication environment such as the caller's communication plan and terminal performance. In particular, in the present invention, since the sender sets the selected access network 210, 220, 230 as the destination network and transmits the data to the destination terminal 120 using the destination network, the communication fee of the sender that is the subject of the fee. There is an economic effect to save money.

Meanwhile, in the above-described embodiment, when the call service is requested from the calling terminal 110 by the CSCF 400, the calling terminal 120 sends a list of access networks 210, 220, and 230 to which the called terminal 120 is connected. As described above, the present invention may be applied to data communication services such as a messenger service as well as a call service. That is, when the CSCF 400 according to the present invention receives a data communication service such as a messenger service or a multimedia message transmission service from the calling terminal 110 to the called terminal 120, the called terminal 120 is accessed. The network list may be provided to the calling terminal 110, and the access network selected by the calling terminal 110 may be set as the called network to form a session between the calling terminal 110 and the called terminal 120.

While the specification contains many features, such features should not be construed as limiting the scope of the invention or the scope of the claims. In addition, the features described in the individual embodiments herein may be combined and implemented in a single embodiment. Conversely, various features described in the singular < Desc / Clms Page number 5 > embodiments herein may be implemented in various embodiments individually or in combination as appropriate.

Although the operations have been described in a particular order in the figures, it should be understood that such operations are performed in a particular order as shown, or that all described operations are performed to obtain a sequence of sequential orders, or a desired result . In certain circumstances, multitasking and parallel processing may be advantageous. It should also be understood that the division of various system components in the above embodiments does not require such distinction 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 can be implemented by a program and stored in a computer-readable recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto optical disk, etc.). Such a process can be easily carried out by those skilled in the art and will not be described in detail.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention. The present invention is not limited to the drawings.

110, 120: mobile communication terminal 200: mobile communication network
210: WCDMA network 220: LTE network
230: WiFi network 300: IMS network
400: CSCF 410: transceiver
420: storage unit 430: registration processing unit
440: access network check unit 450: session forming unit

Claims

A method of providing a communication service using an incoming network selected by a caller in an IP Multimedia Subsystem (IMS) that communicates a plurality of heterogeneous access networks,
Receiving a request for a communication service from a calling terminal to a called terminal;
Confirming a plurality of heterogeneous access networks to which the called terminal is connected;
Transmitting a list of the identified heterogeneous access networks to the calling terminal;
A receiving network setting step of selecting an access network recorded in the heterogeneous access network list from the calling terminal and setting the selected access network as a receiving network for a communication service; And
And a session establishment step of establishing a session with the called terminal via the established called network.

The method of claim 1,
Before the request receiving step,
And receiving and storing a registration key for each heterogeneous access network accessible at the location of the called terminal from the called terminal.
And the checking step identifies a plurality of heterogeneous access networks to which the called terminal is accessing based on the access network identification information recorded in each registered key of the called terminal.

3. The method of claim 2,
And each identification key records identification information of the called terminal, IP and port number, and access network identification information.

A method of providing a communication service using an incoming network selected by a caller in an IP Multimedia Subsystem (IMS) that communicates a plurality of heterogeneous access networks,
Receiving access network information of a second mobile communication terminal from the first mobile communication terminal;
Setting the second mobile communication terminal as an access network confirmation target terminal and monitoring whether a registration key is received from the second mobile communication terminal;
When one or more registration keys are received from the second mobile communication terminal as a result of the monitoring, each heterogeneous access network to which the second mobile communication terminal is connected is identified and the list of the identified heterogeneous access networks is determined. Transmitting to a mobile communication terminal;
Receiving, from the first mobile communication terminal, a communication service request message in which identification information of a specific access network selected from the list of heterogeneous access networks is recorded and identification information of the second mobile communication terminal is recorded as destination information;
Setting an access network corresponding to the identification information of the access network recorded in the communication service request message as a destination network; And
And establishing a session with the second mobile communication terminal via the set incoming network.

A storage unit which stores access information for each mobile communication terminal;
A receiving unit for requesting a communication service from a calling terminal to a called terminal;
An access network confirming unit for checking a plurality of heterogeneous access networks to which the called terminal is connected in the storage unit, and transmitting the checked heterogeneous access networks to the calling terminal; And
If one of the access networks recorded in the heterogeneous access network is selected from the calling terminal, the selected access network is set as a destination network for a communication service, and a session is established with the called terminal via the set destination network. And a session forming unit.

The method of claim 5, wherein
And a registration processing unit for receiving a registration key for each heterogeneous access network accessible at the location of the called terminal from the called terminal and storing it in the storage unit.
And the access network confirming unit identifies a plurality of heterogeneous access networks to which the called terminal is connected based on access network identification information recorded in each registration key of the called terminal.

The method according to claim 6,
And the storage unit stores the registration key in which identification information, IP and port number, and access network identification information of the called terminal are recorded.

A receiving unit for requesting access network information of the second mobile communication terminal from the first mobile communication terminal;
Set the second mobile communication terminal as an access network confirmation target terminal, monitor whether a registration key is received from the second mobile communication terminal, and if one or more registration keys are received from the second mobile communication terminal, the registration is performed. An access network identification unit for identifying each heterogeneous access network to which the second mobile communication terminal is connected based on a key, and transmitting the checked list of heterogeneous access networks to the first mobile communication terminal; And
Receiving a communication service request message from the first mobile communication terminal in which identification information of a specific access network selected from the list of heterogeneous access networks is recorded and identification information of the second mobile communication terminal is recorded as destination information; And a session forming unit configured to set an access network corresponding to the identification information of the access network as a destination network and form a session with the second mobile communication terminal via the destination network.