KR101451394B1 - Device and method for providing vocie call continuity service - Google Patents

Abstract

The VCC service providing apparatus comprises: a call connection request receiving unit for receiving a voice service call connection request message from the terminal via a first one of a plurality of communication networks; a handover connection request receiving unit for receiving, from the first network, A service subscription information generation unit for generating subscription information data including whether to join the handoff service based on the determination result, And a service subscription information transmission unit that transmits the service subscription information to the terminal as a response message to the terminal.

Description

TECHNICAL FIELD [0001] The present invention relates to a VCC service providing method and apparatus,

The present invention relates to a method and apparatus for providing a VCC service.

In recent years, due to the development of mobile communication networks and the development of mobile communication terminals, various kinds of services have been developed.

Active research has been conducted on a method of providing a call service and a multimedia service by selecting a network suitable for a user according to the state of the terminal or the state of the network.

In particular, as the network evolves from the circuit switch network to the packet switch network, various discussions have been made on the technical standard for continuously providing the voice call service provided in the existing network in the packet network.

The continuity of service is mainly a problem when moving a network or moving a terminal, and a VCC (Voice Call Continuity) technology that supports continuity of a voice call service when a terminal moves between an existing circuit switch network and a packet switch network has recently attracted attention .

In this regard, the prior art (Korean Patent Laid-Open No. 2011-0024154) discloses that when a call is attempted through a wired / wireless integrated network, whether to make a call using an Internet telephone or a general mobile communication service based on the called number And the like.

According to some embodiments of the present invention, when there is a need to provide a VCC service to a terminal according to a change in state of a network, a VCC service capable of effectively determining whether or not a terminal is subscribed to the VCC service, And a method of providing the same.

According to a first aspect of the present invention, there is provided a VCC service providing apparatus for receiving a voice service call connection request message from a terminal via a first one of a plurality of communication networks A service connection determination unit for determining whether the terminal is a terminal subscribed to a handoff service from the first network to the second network based on a result of the determination; And a service subscription information transmitter for transmitting the subscription information data to the terminal as a response message to the subscriber terminal.

According to a second aspect of the present invention, a method for providing a VCC service includes receiving a voice service call connection request message from the terminal via a first one of a plurality of communication networks, 2 network, the method comprising the steps of: generating subscription information data including whether to join the handoff service based on a result of the determination; and transmitting the subscription information data to the terminal And transmitting the response message to the terminal.

According to any one of the above-described tasks, when the VCC service needs to be provided to the terminal according to a change in the state of the network, it is possible to effectively determine whether or not the terminal is subscribed to the VCC service, It is possible to provide a VCC service providing method and apparatus that can provide the VCC service.

1 is a block diagram illustrating a VCC service providing system according to an embodiment of the present invention.
2 is a block diagram illustrating a configuration of a VCC service providing apparatus according to an embodiment of the present invention.
3 is a diagram illustrating an example of a handoff threshold in a VCC service providing method according to an embodiment of the present invention.
FIG. 4A is a diagram illustrating an example of transmission and reception of a message related to service subscription in the VCC service providing method according to an exemplary embodiment of the present invention. Referring to FIG.
FIG. 4B is an exemplary diagram illustrating an example of transmission and reception of a message related to whether or not to join a service, in a VCC service providing method according to another embodiment of the present invention.
5A is a diagram illustrating an example of a message sent from a terminal to a VCC service providing apparatus in a VCC service providing method according to an embodiment of the present invention.
5B is an exemplary diagram illustrating an example of a message sent from a terminal to a VCC service providing apparatus in a VCC service providing method according to an embodiment of the present invention.
6 is a flowchart illustrating a method of providing a VCC service according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another part in between . Also, when an element is referred to as "comprising ", it means that it can include other elements as well, without departing from the other elements unless specifically stated otherwise.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating a VCC service providing system according to an embodiment of the present invention.

The VCC service providing system according to an embodiment of the present invention may include a terminal 100 connected to the network 10, a VCC service providing apparatus 200, and a mobile telephone switching center 300.

The network 10 may be a local area network (LAN), a wide area network (WAN), a value added network (VAN), a personal area network (PAN) mobile radio communication network) or satellite communication network.

The terminal 100 may be implemented as a computer, a portable terminal, or a television, which can be connected to a remote server through the network 10 or connected to other terminals and servers. Here, the computer includes, for example, a notebook computer, a desktop computer, a laptop computer, and the like, each of which is equipped with a web browser (WEB Browser), and the portable terminal may be a wireless communication device , Personal Communication System (PCS), Global System for Mobile communications (GSM), Personal Digital Cellular (PDC), Personal Handyphone System (PHS), Personal Digital Assistant (PDA), International Mobile Telecommunication (IMT) Handheld based wireless communication devices such as W-CDMA (Code Division Multiple Access) -2000, W-CDMA (W-CDMA), Wibro (Wireless Broadband Internet) terminals, can do. In addition, the television may include an Internet Protocol Television (IPTV), an Internet television (TV), a terrestrial TV, a cable TV, and the like.

According to an embodiment of the present invention, the terminal 100 can perform voice communication, multimedia data transmission, and the like through the first network and the second network, wherein the first network includes, for example, a Wi- And the second network may be a mobile communication network, for example, a third-generation (3G) network. However, the first network and the second network are not limited thereto, and may be, for example, 4G LTE, Wibro, and the like.

The VCC service providing apparatus 200 includes an application server for providing a VCC (Voice Call Continuity) service. The VCC service providing apparatus 200 switches a voice call to the AT 100 and a connection path of the AT 100 between the first network and the first network. And entities that perform a series of functions to perform the functions.

The mobile switching center (MSC) 300 may provide a circuit switching service to the mobile communication subscriber in cooperation with the fixed network, and may provide a service for user traffic between the mobile communication network and the general telephone network, another mobile switching center in the same or another mobile communication network The connection point can be configured automatically. In addition, the mobile telephone switching center 300 may be responsible for location registration / management, authentication, handover, roaming, and the like.

2 is a block diagram illustrating a configuration of a VCC service providing apparatus according to an embodiment of the present invention.

A VCC service providing apparatus 200 according to an embodiment of the present invention includes a call connection request receiver 210, a service subscription determiner 220, a service subscription information generator 230, and a service subscription information transmitter 240 .

The call connection request receiving unit 210 receives the voice service call connection request message from the terminal 100 via the first one of the plurality of communication networks.

The service subscription determination unit 220 determines whether the subscriber station 100 is subscribed to the handoff service from the first network to the second network.

Here, the handoff service means a service in which the terminal 100 automatically maintains a call state by automatically tuning to a new network when the terminal 100 in a busy state is out of the network service area.

One embodiment of the present invention may include a service of handing off to a second network when the received signal strength indicator (RSSI) of the first network is maintained below a preset threshold for a predetermined time or more.

3, if the RSSI of the first network is checked, for example, the RSSI of the Wi-Fi is checked and the RSSI is maintained at -78 dBm or less for 3 seconds or longer, a SETUP message To perform handoff.

According to an embodiment of the present invention, the service subscription determination unit 220 may determine whether to join the handoff service of the subscriber station 100 based on the call connection request message.

Referring to FIG. 4A, the VCC service providing apparatus 200 receives a call connection request message, for example, an INVITE message from the AT 100, and determines whether or not the subscriber station 100 has joined the handoff service, The mobile terminal 100 can determine whether to join the handoff service.

According to another embodiment of the present invention, the service subscription determination unit 220 determines whether the subscriber station 100 has received a confirmation request as to whether the subscriber station 100 subscribed to the handoff service from the first network to the second network And a terminal request receiving unit 225 for receiving a message. That is, the service subscription determination unit 220 determines whether to join the handoff service of the corresponding terminal 100 based on the confirmation request message about whether or not to join the handoff service received through the terminal request reception unit 225 have.

Referring to FIG. 4B, after the VCC service providing apparatus 200 has undergone a predetermined registration procedure, the VCC service providing apparatus 200 receives an acknowledgment request message indicating whether or not to join the handoff service from the corresponding terminal, A response message can be transmitted.

5A, the confirmation request message may include, for example, extensible markup language (XML) data, and the XML data may include identification information 51 of the terminal 100, request information 52, 53).

For example, the confirmation request message may include a terminal number (for example, <userid> '07012341234' </ userid>) as a terminal identification information, a VCC service subscription inquiry query > vcc </ request> ').

The service subscription information generating unit 230 generates subscription information data including whether to join the handoff service based on the determination result.

5B, the subscription information data may include, for example, XML data, and the XML data may include identification information 55 of subscriber terminal 100, subscription information 56, and transaction ID 57 .

Here, the subscription information 56 indicates result information on whether or not the VCC service is to be subscribed. For example, it may be represented by "true" and "false" or "0" and "1".

According to an embodiment of the present invention, the service subscription information transmission unit 240 transmits subscription information data to the terminal 100 as a response message to the subscriber station 100.

That is, the VCC service providing apparatus 200 receives the confirmation request message for whether or not to join the VCC service from the terminal 100, and can transmit the subscription information data as a response message to the VCC service providing apparatus 200. [

According to another embodiment of the present invention, the service subscription information transmission unit 240 may transmit the subscription information data to the terminal 100 by including the subscription information data in a response message corresponding to the call connection request message. In addition, the service subscription information transmission unit 240 may include the subscription information data in the header of the response message corresponding to the call connection request message and transmit the subscription information data to the terminal 100.

Also, according to an embodiment of the present invention, the service subscription information transmission unit 240 may transmit a response message including information on whether the terminal 100 performs VCC operation to the subscription information data to the subscriber station 100. [

The VCC service providing apparatus 200 determines whether or not the VCC operation is performed in the response message transmitted to the terminal 100 in the case where the terminal 100 should not perform the VCC operation according to the service policy or the state of the terminal 100 Information can be included. For example, in the case of the &quot; toll flow &quot; service, a charge problem due to a handoff may occur, so that predetermined information necessary for not performing the VCC operation in the terminal 100 is provided to the terminal 100 .

The VCC service providing apparatus 200 receives the voice service call connection request message of the AT 100 and recognizes that the AT 100 is a VCC service subscription terminal and transmits a prefix of the Request-Uniform Resource Identifier (R-URI) prefix information, and transmits the response message including information on whether or not to perform the VCC operation to the corresponding terminal 100.

The VCC operation performance information may be expressed in the form of "P-KT-UE-SVC-Info: vcc_act" or "P-KT-UE-SVC-Info: vcc_deact" .

6 is a flowchart illustrating a method of providing a VCC service according to an embodiment of the present invention.

The VCC service providing method according to an embodiment of the present invention can be implemented by connecting the terminal 100 and the VCC service providing apparatus 200 to the network 10. [

The VCC service providing method according to the embodiment shown in FIG. 6 includes steps that are processed in a time-series manner in the VCC service providing apparatus 200 shown in FIG. Therefore, the contents described above with respect to the VCC service providing apparatus 200 shown in FIG. 2 may be applied to the VCC service providing method according to the embodiment shown in FIG.

In step S6100, the VCC service providing apparatus 200 receives a voice service call connection request message from the terminal 100 via the first one of the plurality of communication networks.

In step S6200, the VCC service providing apparatus 200 determines whether the terminal 100 is a terminal subscribed to the handoff service from the first network to the second network.

Also, in step S6200, the VCC service providing apparatus 200 can determine whether or not the subscriber station subscribes to the handoff service based on the call connection request message.

In step S6300, the VCC service providing apparatus 200 receives a confirmation request message from the terminal 100 to determine whether the terminal 100 subscribes to the handoff service from the first network to the second network .

In step S6300, the VCC service providing apparatus 200 generates subscription information data including whether to join the handoff service, based on the determination result.

In step S6400, the VCC service providing apparatus 200 transmits the subscription information data to the terminal 100 as a response message to the terminal 100. [

In addition, in step S6400, the VCC service providing apparatus 200 may transmit the subscription information data to the terminal 100 by including the subscription information data in a response message corresponding to the call connection request message.

In step S6400, the VCC service providing apparatus 200 may transmit the subscription information data to the AT 100 in the header of the response message corresponding to the call connection request message.

The VCC service providing method according to the embodiment described with reference to FIG. 6 can also be implemented in the form of a recording medium including instructions executable by a computer such as a program module executed by a computer. Computer readable media can be any available media that can be accessed by a computer and includes both volatile and nonvolatile media, removable and non-removable media. In addition, the computer-readable medium may include both computer storage media and communication media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Communication media typically includes any information delivery media, including computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave, or other transport mechanism.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

Claims (11)

1. A VCC service providing apparatus for providing a VCC service to a terminal,
A call connection request receiving unit for receiving a voice service call connection request message from the terminal via a first one of a plurality of communication networks;
A service subscription determining unit for determining whether the subscriber station is a subscriber of a handoff service from the first network to the second network;
A service subscription information generating unit for generating subscription information data including whether to join the handoff service based on the determination result;
And a service subscription information transmitter for transmitting the subscription information data to the terminal as a response message to the subscriber terminal,
The service subscription information transmission unit may include information on whether the VCC operation is performed in the service policy or whether the VCC operation is performed in the terminal corresponding to the state of the terminal,
VCC service providing device.
The method according to claim 1,
The service subscription-
And determining whether to join the handoff service of the terminal based on the call connection request message
VCC service providing device.
The method according to claim 1,
The service subscription-
And a terminal request receiver for receiving from the terminal a confirmation request message indicating whether the terminal is a terminal subscribed to a handoff service from the first network to the second network
VCC service providing device.
The method according to claim 1,
The service subscription information transmission unit,
And transmitting the subscription information data to the terminal by including the subscription information data in a response message corresponding to the call connection request message
VCC service providing device.
The method according to claim 1,
The service subscription information transmission unit,
And transmits the subscription information data to the terminal by including the subscription information data in a header of a response message corresponding to the call connection request message
VCC service providing device.
The method according to claim 1,
The handoff service comprises:
And handing off to the second network when the signal strength of the first network is maintained below a predetermined threshold for a predetermined time or more
VCC service providing device.
A method for providing a VCC service to a terminal by a VCC service providing apparatus,
(a) receiving a voice service call connection request message from the terminal via a first one of a plurality of communication networks;
(b) determining whether the terminal is a terminal subscribed to a handoff service from the first network to the second network;
(c) generating subscription information data including whether to join the handoff service based on the determination result; And
(d) transmitting the subscription information data to the terminal as a response message to the terminal,
Wherein the step (d) further comprises the step of transmitting, to the terminal, information on whether to perform a VCC operation of the terminal corresponding to a service policy or a state of the terminal,
VCC service delivery method.
8. The method of claim 7,
The step (b)
And determining whether to join the handoff service of the terminal based on the call connection request message
VCC service delivery method.
8. The method of claim 7,
The step (b)
Receiving from the terminal a confirmation request message indicating whether the terminal is a terminal subscribed to a handoff service from the first network to the second network
VCC service delivery method.
8. The method of claim 7,
The step (d)
And transmitting the subscription information data to the terminal by including the subscription information data in a response message corresponding to the call connection request message
VCC service delivery method.
8. The method of claim 7,
The step (d)
And transmitting the subscription information data to the terminal by including the subscription information data in a header of a response message corresponding to the call connection request message
VCC service delivery method.

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