KR101708007B1 - System for present communication service to a plurality of terminals having same identification number, apparatus thereof, server thereof and method thereof - Google Patents

Abstract

The present invention relates to a system for providing a call service to a plurality of terminals having the same identification number, an apparatus therefor, and a method therefor. The present invention relates to a system for providing a call service to a plurality of terminals having the same identification number, A plurality of terminals registered in the switching device as one terminal identifier; A proxy device for providing cookie information such that the plurality of terminals are distinguished from each other; And the switching device providing the same call service to the plurality of terminals through the same identification number or providing the call service by distinguishing the plurality of terminals through at least one of the cookie information and the terminal identifier And the apparatus and method according to the present invention can be provided. The present invention registers and manages a plurality of terminals with the same identification number and provides the same call service, thereby providing convenience so that a user can manage a plurality of terminals by one identification number, A plurality of terminals are distinguished through a terminal identifier to provide a call service, thereby enabling a user to use the apparatus efficiently.

Description

Technical Field [0001] The present invention relates to a system for providing a call service to a plurality of terminals having the same identification number, an apparatus therefor and a method for providing the same,

The present invention relates to a call service providing technology, and more particularly, to a call service providing technology in which a plurality of terminals are given the same identification number and a plurality of terminals are provided with the same call service, To a system therefor, and to a method therefor.

Voice over IP (VoIP) is a term used to refer to Internet Protocol (IP) telephony technology for a set of facilities that deliver voice information using IP. Generally, this means that the voice information is transmitted in digital form in discontinuous packets, rather than a traditional circuit-based protocol like the public switched telephone network (PSTN), a public switched telephone network. The main advantage of VoIP and Internet telephony technology is that by integrating the telephony service using the existing IP network, the users of the telephone will be able to receive the local and international telephone service in the Internet and intranet environment with only the local telephone charge.

VoIP has evolved through VoIP forums to encourage the use of ITU-T H.323, the standard for transporting voice and video over IP over the public Internet or intra-company intranets. This VoIP Forum was attended by major equipment manufacturers. The VoIP Forum also encourages directory service standards, enabling users to locate other users, and enabling the use of touch phone signals for automatic phone distribution and voicemail.

In addition to the original IP capabilities, VoIP uses Real Time Protocol (RTP) to support the arrival of packets in a timely manner. When using a public network, it is difficult to guarantee the current quality of service (QoS). Better services are available using proprietary companies or private networks managed by Internet telephony service providers (ITSPs).

Meanwhile, due to the development of an all-IP-oriented network, VoIP-based calls are supported not only in fixed-type terminals but also in portable terminals. More and more types of terminals are adopting VoIP technology. Typical examples of fixed terminals supporting VoIP include Internet telephones used at home, so-called "soft phones", and desktop computers or notebook computers installed with applications supporting communication via VoIP Computer. In addition, since the portable terminal supports a technology such as FMC (Fixed Mobile Convergence), it can support the communication service through the VoIP when accessing the IP network through the portable terminal. As described above, the number of terminals capable of using VoIP is increasing, and users generally have at least one fixed terminal and a portable terminal, and it is expected that most terminals provided by the user can provide VoIP service do. Therefore, when one user has a plurality of VoIP terminals and a plurality of users jointly use a plurality of VoIP terminals, research on providing VoIP call services to a plurality of terminals is required.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a system in which a plurality of terminals are grouped by the same identification number, .

Another object of the present invention is to provide a system capable of providing a single call service by grouping a plurality of terminals into the same identification number, and separately providing a call service by dividing a plurality of terminals if necessary, Method.

According to another aspect of the present invention, there is provided a communication system for providing a call service to a plurality of terminals having the same identification number. The communication system includes the same identification number, A plurality of terminals registered in the switching device as terminal identifiers; A proxy device for providing the cookie information so that the plurality of terminals are distinguished; And the switching device providing the same call service to the plurality of terminals through the same identification number or providing the call service by distinguishing the plurality of terminals through at least one of the cookie information and the terminal identifier do.

According to an aspect of the present invention, there is provided a switching device for providing a call service to a plurality of terminals having the same identification number, the switching device including: a communication module for transmitting and receiving data; A registration module for registering a plurality of terminals with the same identification number, each of the plurality of terminals being divided into cookie information assigned to each of the plurality of terminals and a unique terminal identifier of each of the plurality of terminals; And a control module that provides the same call service to the plurality of terminals through the same identification number or provides the call service by distinguishing the plurality of terminals through at least one of the cookie information and the terminal identifier do.

The control module, when providing the same call service, receives a session connection request message requesting a session connection to a terminal registered with the identification number from a specific terminal, And transmits the request message to the proxy device so as to be transmitted to each of the terminals specified as the object.

The control module, when providing the call service by distinguishing the plurality of terminals, receives a session connection request message for requesting a terminal registered with the identification number from a specific terminal, To the proxy device, and transmits the session connection request message to each of the terminals specified as the target.

Wherein the control module provides a session connection between any one of the terminals that has transmitted the received session connection request acceptance message and the specific terminal upon receiving the session connection request acceptance message accepting the session connection through the proxy device .

Upon receipt of the session connection request acceptance message accepting the session connection via the proxy device, the control module terminates the session connection procedure of the remaining terminals except for one terminal that has transmitted the received session connection request accept message .

The registration module receives the registration request message of each of the plurality of terminals, extracts the identification number, the cookie information, and the terminal identifier from the received registration request message, and registers each of the plurality of terminals.

The switching device further includes a storage module for storing the same identification number of each of the plurality of terminals, the cookie information of each of the plurality of terminals, and the registration information in which the terminal identifiers of the plurality of terminals are mapped.

The cookie information is a value that allows a proxy device that relays messages between the switching device and the plurality of terminals to divide each of the plurality of terminals.

According to an aspect of the present invention, there is provided a proxy apparatus for providing a call service to a plurality of terminals having the same identification number, the proxy apparatus comprising: a switching unit; And a registration request message requesting a registration with the same identification number from the plurality of terminals, wherein the registration request message includes cookie information for distinguishing each of the plurality of terminals, and transmits a registration request message including the provided cookie information to the communication unit To the switching device through the control unit.

The registration request message is a register message according to SIP, and the control unit includes the cookie information in the < Contact > header of the Register message and delivers the same to the switching device.

Wherein the control unit, when receiving a message transmitted from the switching device to one of the plurality of terminals, identifies the object by referring to the cookie information, and transmits the message to the divided object via the communication unit .

The proxy apparatus further comprises a storage unit for mapping the identification number and the cookie information for each of the plurality of terminals and storing the same.

According to an aspect of the present invention, there is provided a method for providing a call service to a plurality of terminals having the same identification number in a switching device, Upon receipt of a session connection request message requesting a connection, confirming whether there is a plurality of destination terminals having the identification number; If the number of the called terminals registered as the identification number is greater than the number of the called terminals registered as the identification number, whether the terminal is in the same state mode for providing the same call service to the plurality of the called terminals or in the state separation mode for providing the call service ; Transmitting a session connection request message specifying each of the plurality of destination terminals to the proxy device and transmitting the session connection request message to each of the destination terminals specified as a target, if the mode is the same; And establishing a session connection between any one of the called terminals and the originating terminal that has transmitted the received session connection request acceptance message when receiving the session connection request acceptance message accepting the session connection through the proxy device do.

If it is determined in the determination step that the terminal is in the state separation mode, the terminal device transmits to the proxy device a session connection request message specifying each of the plurality of the called terminals, excluding the called terminal, Respectively; And establishing a session connection between any one of the called terminal and the calling terminal that has transmitted the received session connection request accept message upon receiving the session connection request acceptance message accepting the session connection.

The transmitting step separates the plurality of destination terminals by using at least one of the cookie information and the terminal identifier, and transmits the session connection request message by specifying each of the divided incoming terminals as a target.

The session connection request message is an INVITE message according to SIP, and the transmitting step specifies that the destination terminal is targeted to the < Request URI > header of the INVITE message so that the INVITE message is transmitted to each of the specified destination terminals. .

And terminating the session connection procedure of the called terminal excluding any one of the called terminals that has transmitted the session connection request accept message after the setting step.

After receiving the session connection request confirmation message for confirming the session connection request from the at least one called terminal before the establishing step, the terminal transmits any one of the received session connection request confirmation messages to the calling terminal The method comprising the steps of:

According to the embodiment of the present invention as described above, a plurality of terminals can be registered with the same identification number, and a plurality of terminals registered with the same identification number can be used as one call service target. In the embodiment of the present invention, the call service is a VoIP service based on packet switching. Accordingly, a terminal supporting various VoIP types can provide a call service through one identification number. For example, by providing the VoIP service of the fixed terminal and the portable terminal with the same identification number, the user can receive the VoIP-based call service with the desired device. In addition, various devices supporting VoIP can be integrated into one identification number and managed by the user. The terminals managed with the same identification number can be separately managed through the cookie information and the terminal identifier, so that each terminal can be used separately if necessary. For example, it is assumed that a desktop computer into which an application supporting VoIP is implanted is used by all the family members, and each family member has a portable terminal supporting VoIP. When the portable terminal is registered with the same identification number as the desktop computer and one of the family members, the device can be divided and used by a plurality of users as needed, thereby enabling efficient use of the device.

Also, in the case of an enterprise subscriber, a single user may use a portable FMC terminal, a fixed wired IP phone installed in the company, or a UC (Unified Communication) PC softphone, and registers the plurality of terminals with one identification number The user can make necessary communication with one identification number or perform necessary work even when the user is in the vicinity or outside of the office. Accordingly, the user can manage a plurality of terminals with one identification number, thereby providing convenience to the business. If necessary, a fixed terminal installed in a company can be used by a plurality of users, thereby making it possible to efficiently use the terminal.

In summary, a plurality of terminals are registered and managed with the same identification number, and the same call service is provided, thereby providing convenience for the user to manage a plurality of terminals by one identification number, By providing a call service by dividing a plurality of terminals by an identifier, the user can use the device efficiently.

Brief Description of the Drawings Fig. 1 is a diagram for explaining a communication system for providing a call service to a plurality of terminals having the same identification number according to an embodiment of the present invention; Fig.
2 is a diagram for explaining a configuration of a switching device of a communication system according to an embodiment of the present invention;
3 is a diagram for explaining a configuration of a proxy apparatus of a communication system according to an embodiment of the present invention.
4 is a diagram for explaining a configuration of a terminal of a communication system according to an embodiment of the present invention.
5 is a flowchart illustrating a procedure for registering a plurality of terminals having the same identification number in a switching device according to an embodiment of the present invention.
6 is a flowchart illustrating a method for providing a call service to a plurality of terminals having the same identification number according to an embodiment of the present invention.
7 is a flowchart illustrating a method for providing a call service to a plurality of terminals having the same identification number in a switching device according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description and the accompanying drawings, detailed description of well-known functions or constructions that may obscure the subject matter of the present invention will be omitted. It should be noted that the same constituent elements are denoted by the same reference numerals as possible throughout the drawings.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor is not limited to the meaning of the terms in order to describe his invention in the best way. It should be interpreted as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention, and not all of the technical ideas of the present invention are described. Therefore, It is to be understood that equivalents and modifications are possible.

1 is a diagram for explaining a communication system for providing a call service to a plurality of terminals having the same identification number according to an embodiment of the present invention.

1, a communication system according to an embodiment of the present invention includes a switching device 100 located in a core network, a switching device 100 located at a contact point of a core network and an access network, And a terminal 400 connected to the proxy network 200 and connected to the access network.

In the exemplary embodiment of the present invention, a terminal 400 requesting a call connection among the terminals 400 is called a calling terminal and a terminal 400 that is a call connection target is called a called terminal. The first to fourth terminals 401, 402, 403 and 404 are illustrated in FIG. 1, and the first to fourth terminals 402, 403 and 404 ) Is assumed to be the called terminal. In general, each of the terminals 400 has one identification number, and the identification number can be used as information for distinguishing the terminal 400 from the other terminals 400. However, according to the embodiment of the present invention, a plurality of terminals 400 may have the same identification number.

The switching device 100 basically provides a VoIP-based call service. The call service is a service that enables the terminal 400 and the terminal 400 to communicate with each other, and includes a voice call and a video call. For this, the switching device 100 registers the terminal 400, manages the call state of the registered terminal 400, and provides a call service. The call state indicates whether the terminal 400 can talk.

The switching device 100 connects a session between a calling terminal and a called terminal to provide a call service according to VoIP. That is, the switching device 100 may perform a series of procedures for session connection according to SIP. The session connection setup is dedicated to allocate transmission resources between a calling terminal and a called terminal in order to guarantee quality for a call service according to VoIP. That is, the switching device 100 is a device for performing packet switching according to VoIP, and can be implemented through a soft switch. Specifically, when the calling terminal requests the session connection with the called terminal for the call, the switching device 100 delivers the session connection request to the called terminal. If the called terminal accepts the session connection request, It is possible to perform switching to establish a session connection by allocating transmission resources exclusively.

In particular, the switching device 100 provides a call service to only the terminal 400 registered in the switching device 100 itself. The switching device 100 can manage a plurality of terminals 400 with one identification number. To this end, the switching device 100 allows a plurality of terminals 400 to request registration with one identification number. At this time, the switching device 100 may use the cookie information and the terminal identifier to distinguish the plurality of terminals 400 registered with one identification number. Here, the cookie information is a value assigned to each terminal 400 by the proxy apparatus 200. In addition, the terminal identifier is a value unique to the terminal 400.

The calling terminal can request the session connection for the call with the called terminal registered with the specific identification number. At this time, there may be a plurality of called terminals registered with the specific identification number. In this case, the switching device 100 can transmit the session connection request of the calling terminal to all the called terminals registered with the same identification number. In addition, the switching device 100 may not transmit a session connection request to the called terminal when any one of the called terminals registered with the same identification number is busy, if necessary. In response to the session connection request, the switching device 100 may connect a session between the called terminal and the calling terminal that accepts the session connection.

The proxy device 200 serves as a proxy between the terminal 400 and the switching device 100. The proxy device 200 can relay a registration message between the switching device 100 and the terminal 400 when the terminal 400 intends to register with the switching device 100. [ When the switching device 100 intends to provide a call service to the terminal 400, the proxy device 200 can relay a message between the switching device 100 and the terminal 400 between the switching device 100 and the terminal 400. In this way, the proxy device 200 prevents the terminal 400 from directly connecting to the switching device 100, thereby preventing the switching device 100 from being exposed. In addition, it has a function of defending an abnormal packet such as various DoS, and it can perform a function of communicating communication with a terminal in a NAT (Network Address Translation) environment. The proxy device 200 may be implemented through an SBC (Session Border Controller) device.

2 is a diagram for explaining a configuration of a switching device of a communication system according to an embodiment of the present invention.

2, the switching device 100 according to the embodiment of the present invention includes a communication module 110, a storage module 120, a registration module 130, and a control module 140.

The communication module 110 is a means for transmitting and receiving data, and can transmit and receive various kinds of messages. For example, the message may be a message according to SIP. The communication module 110 receives the SIP message from the terminal 400 through the proxy device 200 and transmits the SIP message to the control module 140 and transmits the SIP message received from the control module 140 to the proxy device 200 To the terminal 400.

The storage module 120 may store registration information for the terminal 400. [ The registration information is information for managing the registered terminal 400. Table 1 below illustrates registration information according to an embodiment of the present invention.

Terminal Identification number IP address port Access address Terminal identifier The second terminal 070-12345678 The IP of the second terminal or the IP of the proxy device 5060 sip: 07012345678-cookie2 @ domain User-Agent header value of the second terminal The third terminal The IP of the third terminal or the IP of the proxy device 5060 sip: 07012345678-cookie3 @ domain User-Agent header value of the third terminal The fourth terminal The IP of the terminal 3 or the IP of the proxy device 5060 sip: 07012345678-cookie4 @ domain User-Agent header value of the fourth terminal ...... ...... ...... ...... ......

Referring to Table 1, the registration information includes an identification number, an IP address, a port, a connection address, and a terminal identifier.

The terminal 400 transmits a registration request message to the proxy device 200 in order to register in the switching device 100, and the registration request message can be a Register message according to the SIP. Upon receiving the Register message, the proxy device 200 further describes the cookie information given to the terminal 400 in the <Contact> header of the received Register message, and transmits the cookie information to the switching device 100. The registration module 130 receives the register message transmitted by the proxy device 200 through the communication module 110 and extracts necessary information from the register message and permits the registration module 120 to register the registration information Can be stored.

Table 2 below illustrates a main header of a Register message transmitted to the switching device 100 by the proxy device 200 according to the embodiment of the present invention.

Terminal To From Contact The second terminal Sip: 07012345678 @ domain Sip: 07012345678 @ domain Sip: 07012345678-Cookie2 @ domain The third terminal Sip: 07012345678 @ domain Sip: 07012345678 @ domain Sip: 07012345678-Cookie3 @ domain The fourth terminal Sip: 07012345678 @ domain Sip: 07012345678 @ domain Sip: 07012345678-Cookie4 @ domain

Referring to Table 1 and Table 2, the Register message includes <To>, <From>, and <Contact> headers. The <To> header of the SIP message describes the identification number of the called terminal and the domain to which the called terminal belongs, and the <From> header describes the identification number of the calling terminal and the domain of the calling terminal. However, the Register message describes the identification number and domain of the terminal 400 requesting registration in both the <To> and the <From> header.

The <Contact> header consists of the identification number and domain. For example, if the value of the <Contact> header transmitted from the terminal 400 to the proxy device 200 is "07012345678 @ domain", the identification number is "07012345678." At this time, The value of the header includes the cookie information given to each terminal 400. The value of the <Contact> header containing the cookie information is thus set as the connection address in Table 1. As described above, If the cookie information of the second terminal 402 is &quot; cookie2 &quot;, the proxy apparatus 200 transmits the cookie including the &quot; cookie2 &quot; The device 200 transmits the value of the <Contact> header as "07012345678-cookie2 @ domain". Accordingly, the registration module 130 receives the Register message through the communication module 110, extracts the connection address "07012345678-cookie2 @ domain" from the <Contact> header of the received Register message, , And "07012345678" can be extracted and stored. As shown in Table 1 and Table 2, the third terminal 403 and the fourth terminal 404 can similarly store registration information.

The registration module 130 may extract the <User-Agent> header value described in the Register message of each terminal 400 and store the same as the terminal identifier of the registration information. In addition, a terminal identification header describing a terminal identifier may be separately defined. Accordingly, the registration module 130 may extract a defined terminal identification header value and store the extracted terminal identification header value as a terminal identifier. The cookie information may be changed when the terminal 400 accesses the proxy apparatus 200 with a different IP. Accordingly, the terminal identifier can be used to identify the terminal 400 when the same terminal 400 uses different cookie information.

A port represents a port number to be used for data transmission / reception, and is described in a Register message of each terminal 400. The registration module 130 may extract the port number from the Register message and store the extracted port number in the registration information.

The registration module 130 may extract the IP address of each terminal 400 or the IP address of the proxy device 200 from the Register message with the IP address and store the extracted IP address as registration information.

As described above, by storing the registration information, the switching device 100 can use the cookie information and the terminal identifier to manage the terminal 400 with one identification number but different terminals 400 .

The registration module 130 performs registration of the terminal 400 as described above. At this time, the registration module 130 permits the registration of a plurality of terminals 400 having the same identification number. In order to identify each terminal 400, as described with reference to Table 1, Identifiers can be used. In addition, the registration module 130 may exchange messages necessary for registration with the terminal 400 for registration.

The control module 140 can basically provide a call service to the terminal 400 registered by the registration module 130. [ To this end, the control module 140 may relay a session between the calling terminal and the called terminal by relaying the SIP message for the session connection between the calling terminal and the called terminal through the communication module 110.

The control module 140 provides a call service to a plurality of terminals 400 having the same identification number according to an embodiment of the present invention. To this end, the control module 140 can manage a plurality of terminals 400 having the same identification number using the registration information described in Table 1. In particular, the control module 140 can provide the same call service to a plurality of terminals 400 registered with the same identification number. Also, the control module 140 can distinguish the plurality of terminals 400 registered with the same identification number through the cookie information and the terminal identifier through the registration information described in Table 1. Accordingly, the control module 140 can provide a call service by dividing a plurality of terminals 400 through the cookie information and the terminal identifier. For convenience of description, provision of a call service to a plurality of terminals 400 is referred to as a same state mode, and provision of a call service by dividing a plurality of terminals 400 is referred to as a state separation mode. In the same state mode, the switching device 100 manages all the remaining terminals in the busy state when any one of the terminals 400 having the same identification number is in a call. In addition, in the state separation mode, the switching device 100 enables each of a plurality of terminals 400 having the same identification number to perform outgoing and incoming respectively regardless of the busy state.

The control module 130 may transmit the same SIP message to each of the plurality of terminals 400 registered with the same identification number but separately transmit the plurality of terminals 400. [ In this case, the main header of the transmitted SIP message will be described. Table 3 below is for explaining the main header of the SIP message that the switching device 100 transmits to the proxy device 200.

Terminal To From / Contact Request-URI The second terminal Sip: 07012345678 @ domain Sip: identification number of the calling terminal @ calling domain Sip: 07012345678-Cookie2 @ domain The third terminal Sip: 07012345678 @ domain Sip: identification number of the calling terminal @ calling domain Sip: 07012345678-Cookie3 @ domain The fourth terminal Sip: 07012345678 @ domain Sip: identification number of the calling terminal @ calling domain Sip: 07012345678-Cookie4 @ domain

Referring to Table 3, a plurality of terminals 400 registered with the same identification number are second to fourth terminals 402, 403 and 404, and the first terminal 401 is connected to the second to fourth terminals 402, 403, and 404, respectively.

The control module 140 describes in the header of the SIP message transmitted by the first terminal 401 as described in Table 3 and then transmits the SIP message to each of the plurality of terminals 402, send. That is, the switching device 100 describes the <To>, <From>, <Contact> and <Request-URI> headers as shown in Table 3 and transmits them to the proxy device 200 through the communication module 110 do. The <To>, <From> and <Contact> headers are the same as the SIP message transmitted by the first terminal 401. However, the switching device 100 distinguishes the second to fourth terminals 402, 403, and 404 through the <Request-URI> header, and the proxy device 200 receiving the SIP message transmits the received SIP message Allows you to identify what to send.

3 is a diagram for explaining a configuration of a proxy apparatus of a communication system according to an embodiment of the present invention.

Referring to FIG. 3, the proxy device 200 according to the embodiment of the present invention is located at a contact point with the access network and the core network. The proxy device 200 basically performs a proxy function between the terminal 400 connected through the access network and the switching device 100 existing in the core network.

The proxy apparatus 200 according to the embodiment of the present invention includes a communication unit 210, a storage unit 220, and a control unit 230. [

The communication unit 210 is for communication with the switching device 100 and the terminal 400. In particular, the communication unit 210 can relay the SIP message and the RTP (Real Time Protocol) message transmitted and received between the terminal 400 and the switching device 100.

The storage unit 220 stores connection information for the terminal 400 that accesses the switching device 100 through itself.

Table 4 below illustrates access information according to an embodiment of the present invention.

Terminal Identification number IP address port Access address The second terminal 070-12345678 The IP of the second terminal 5060 sip: 07012345678-cookie2 @ domain The third terminal The IP of the third terminal 5060 sip: 07012345678-cookie3 @ domain The fourth terminal The IP of the fourth terminal 5060 sip: 07012345678-cookie4 @ domain ...... ...... ...... ......

Referring to Table 4, the connection information includes identification counters, IP addresses, ports, and connection addresses.

The control unit 230 can relay a message for registration between the switching device 100 and the terminal 400 through the communication unit 210 when the terminal 400 intends to register with the switching device 100 . When the switching device 100 intends to provide the communication service to the terminal 400, the control unit 230 transmits a message to the switching device 100 and the terminal 400 via the communication unit 210, Can be relayed.

The control unit 230 allocates and assigns the cookie information to the terminal 400 when the terminal 400 first accesses the proxy apparatus 200 via a specific IP. Also, even when the terminal 400 to which the cookie information is attached connects again to the same IP, the cookie information given to the terminal 400 is maintained. However, when the terminal 400 first makes an access through an IP different from the IP provided with the cookie information, the control unit 230 can give different cookie information to the terminal 400. [

The terminal 400 can request the switching device 100 to register it through the proxy device 200. [ To this end, the terminal 400 transmits a registration request message. The control unit 230 receives the registration request message via the communication unit 210. [ The registration request message may be a Register message according to the SIP.

Referring to Table 2, the Register message has a <Contact> header. The <Contact> header consists of an identification number and a domain. For example, if the value of the <Contact> header transmitted from the second terminal 402 is "07012345678 @ domain", the identification number is "07012345678." At this time, The cookie information provided to the second terminal 402 is included in the cookie information 400. Referring to Table 2, in the case of the second terminal 402, the value of the <Contact> header including "cookie2" is "07012345678-cookie2 @ domain" . The control unit 230 then transmits a Register message including the cookie information to the switching device 100 via the communication unit 210 in the < Contact > header. As shown in Table 4, the third and fourth terminals 403 and 404 are also the same as those of the second terminal 402.

On the other hand, the control unit 230 may extract the connection information from the Register message and store it in the storage unit 220.

Referring to Table 4, the control unit 230 extracts the connection address "07012345678-cookie2 @ domain" from the <Contact> header, extracts the identification number "07012345678" The control unit 230 may extract the port number and store the extracted port number as connection information. The IP address may describe the IP address of each terminal 400. The IP address of each terminal 400 may be the same as the IP address of the terminal 400.

By performing the above-described operation, even when a plurality of terminals 400 make a registration request with the same identification number, the control unit 230 identifies each of the terminals 400 in the registration request message for registration request And transmits the cookie information to the switching device 100 so that the switching device 100 can separately manage the plurality of terminals 400. [

The control unit 230 may store the connection information and then receive the SIP message transmitted from the switching device 100 to the specific terminal 400. [ The main headers of these SIP messages are described in Table 3. In this case, the control unit 230 refers to the <Request-URI> header of the SIP message to identify the terminal 400 that is the subject of the SIP message. The control unit 230 can then forward the SIP message to the separated terminal 400 via the communication unit 210. [

Table 5 below is for explaining the main header of the SIP message transmitted by the proxy device 200 to a plurality of terminals 400 registered with the same identification number.

Terminal To From / Contact Request-URI The second terminal Sip: 07012345678 @ domain Sip: identification number of the calling terminal @ calling domain Sip: 07012345678 @ domain The third terminal Sip: 07012345678 @ domain Sip: identification number of the calling terminal @ calling domain Sip: 07012345678 @ domain The fourth terminal Sip: 07012345678 @ domain Sip: identification number of the calling terminal @ calling domain Sip: 07012345678 @ domain

Referring to Table 5, the <To>, <From> and <Contact> headers are maintained while the calling terminal transmits to the switching device 100 and the switching device 100 transmits to the proxy device 200. Meanwhile, as described in Table 3, the switching device 100 explicitly notifies the destination terminal of the terminal 400 having the same identification number through the <Request-URI> header to the proxy device 200. Therefore, the proxy apparatus 200 can know the destination terminal by referring to the <Request-URI> header of the SIP message transmitted by the switching apparatus 100. Therefore, the proxy apparatus 200 does not necessarily have to describe the information for distinguishing the destination terminal in the < Request-URI > header although the proxy apparatus 200 transmits the SIP message to the destination terminal. That is, as shown in Table 5, the proxy apparatus 200 transmits the SIP message to the second to fourth terminals 402, 403, and 404 registered with the same identification number, respectively, It is not necessary to describe information for distinguishing the second to fourth terminals 402, 403, 404 in the header.

On the other hand, a plurality of terminals 400 registered with the same identification number can each serve as a calling terminal. Assuming such a case, the following Table 6 shows a case where the proxy device 200 receives the SIP message transmitted by a plurality of terminals registered with the same identification number, and then the proxy device 200 transmits the SIP message to the switching device 100 When transmitting, the main header of the SIP message.

Terminal To From Contact The second terminal Sip: Identification number of the called terminal @domain Sip: 07012345678 @ domain Sip: 07012345678-Cookie2 @ domain The third terminal Sip: Identification number of the called terminal @domain Sip: 07012345678 @ domain Sip: 07012345678-Cookie3 @ domain The fourth terminal Sip: Identification number of the called terminal @domain Sip: 07012345678 @ domain Sip: 07012345678-Cookie4 @ domain

Referring to Table 6, the <To> header describes the identification number and domain of the called terminal to which the terminals 402, 403, and 404 having the same identification numbers are registered, and the <From> The identification numbers and domains of the terminals 402, 403, and 404 that are registered in the same manner are described. This is the same as the SIP message transmitted by the terminals 402, 403, 404 having the same identification number. However, the proxy apparatus 200 uses the < Contact > header to distinguish the terminals 402, 403, and 404 having the same registered identification numbers. That is, the control unit 230 adds the cookie information of the terminal to the <Contact> header and transmits it to the switching device 100. Accordingly, the switching device 100 receiving the SIP message can know which of the plurality of terminals 402, 403, and 404 registered with the same identification number through the < Contact > have.

4 is a diagram for explaining a configuration of a terminal of a communication system according to an embodiment of the present invention.

4, a terminal 400 according to an exemplary embodiment of the present invention includes a communication unit 410, an input unit 440, an output unit 450, a storage unit 460, and a control unit 470.

The communication unit 410 is a means for connecting to the access network and transmitting and receiving data. Here, the data includes various messages according to the SIP. For example, a message according to SIP may include an INVITE message, a 180 Ringing message, a 200 OK message, an ACK message, a CANCEL message, a 487 Request Canceled message, and a BYE message.

The communication unit 410 may include at least one of a wireless communication unit 420 and a wired communication unit 430. The wireless communication unit 420 includes a wireless communication unit 421, a wireless local area network (WLAN), a wireless communication unit 422 and a wireless personal area (WiFi) Network) communication unit 423. [0051] FIG.

When the terminal 400 uses wireless communication, the wireless communication unit 421, the wireless LAN communication unit 422, and the wireless fan communication unit 423 transmit and receive data according to a wireless communication method. Data can be transmitted or received using any one of them.

The wireless network communication unit 421 is a means for connecting to the access network through the base station and transmitting and receiving data. Upon receiving data from the controller 470, the wireless network communication unit 421 can access the access network through the base station and transmit data. In addition, the wireless network communication unit 421 can access the connection network through the base station, receive data, and provide the received data to the control unit 470.

The wireless LAN communication unit 422 is for performing communication according to a wireless LAN (WLAN), a WiFi, or a WiMAX scheme. Upon receiving data from the controller 470, the wireless LAN communication unit 422 can access the access network through an access point and transmit data. In addition, the wireless LAN communication unit 422 can access the access network through the access point, and then receive the data, and provide the received data to the control unit 470.

The wireless fan communication unit 423 is for transmitting and receiving data according to a wireless fan (WPAN) scheme, and is for exchanging data through a wireless communication with a shorter distance than the wireless network communication unit 421 and the wireless LAN communication unit 422 . The wireless fan communication unit 423 can directly transmit and receive data to and from the other terminals 400. [ In addition, when the wireless fan communication unit 423 can connect to the gateway directly or through multi-hop, the wireless fan communication unit 423 may connect to the access network through the gateway and transmit and receive data. Such a wireless fan communication unit 423 can exemplify communication based on Bluetooth, infrared communication (IrDA), ZigBee, or the like.

The wired communication unit 430 is for transmitting and receiving data by wire. The wired communication unit 430 can connect to the access network via the wired network, and can transmit and receive data. In particular, an access network connecting via a wired network can be a private network. Here, the private network may exemplify a specific group of intra-networks or the like.

The input unit 440 may include a plurality of input keys and function keys for receiving numeric or character information and setting various functions, as means for receiving at least one of a command, selection, data, and information of a user. The input unit 440 senses the key input of the user and transmits an input signal corresponding to the sensed key input to the control unit 470. The input unit 440 may be an input device such as a keyboard, a keypad, a mouse, a joystick, and the like.

The output unit 450 is a means for outputting a result or information according to the operation of the terminal 400. [ In particular, the output unit 450 may output a ring tone or the like according to an embodiment of the present invention. The output unit 450 may include a display device 451 for outputting visual information, and an audio device 453 for outputting auditory information. When the display device 451 is formed in the form of a touch screen, the display device 451 may display a part or all of the functions of the input unit 440, Can be performed. In addition, the audio device 453 may output a ring tone when receiving a session connection request message for a call connection request.

The storage unit 460 is an apparatus for storing data, and includes a main storage unit and an auxiliary storage unit. The storage unit 460 may store an operating system (OS), applications, and the like. In particular, the storage unit 460 may store the received SIP message. SIP repeats the handshake process of exchanging requests and responses with each other, so that stored SIP messages can be used to extract data for responding to a request. Each kind of data stored in the storage unit 460 can be deleted, changed, or added according to a user's operation.

The control unit 470 may be a processing apparatus that actually operates the operating system. For example, the control unit 470 may be a central processing unit (CPU). When the terminal 400 is powered on, the control unit 470 moves the operating system from the auxiliary storage unit of the storage unit 460 to the main storage unit, and then performs booting to drive the operating system.

The control unit 470 may generate various messages according to the SIP, and may transmit the generated messages through the communication unit 410. In addition, the control unit 470, when receiving a message according to the SIP, performs necessary operations according to the type of the message. For example, the control unit 470 may generate a message for registering with the switching device 100, that is, a registration request message, and transmit the message to the switching device 100 through the communication unit 410. The control unit 470 may transmit the INVITE message for the call connection with the counterpart terminal 400. When receiving the INVITE message from the other terminal 400, the control unit 470 can control to output the ring tone through the audio device 453. [ This is to inform the user that there is a call connection request. It is natural that the ring tone can be changed to another such as vibration. In addition, the control unit 470 may control the ring tone to output a ring back tone through the audio device 453 when receiving the 180 Ringing message from the counterpart terminal 400.

5 is a flowchart illustrating a procedure for registering a plurality of terminals having the same identification number in a switching device according to an embodiment of the present invention.

In FIG. 5, it is assumed that the second to fourth terminals 402, 403, 404 register with the same identification number in the switching apparatus 100.

Referring to step S10 of FIG. 5, the second terminal 402 transmits a registration request message to the proxy device 200 in step S501. According to SIP, the registration request message can be a Register message. The <Contact> header of the Register message contains the identification number and the domain. For example, the < Contact > header may be in the format " 07012345678 @ domain &quot;. Here, &quot; 07012345678 &quot;

In step S503, the proxy apparatus 200 performing the role of the proxy transmits the registration request message to the switching apparatus 100, and transmits the registration request message including the cookie information in the <Contact> header of the Register message. For example, if the value of the <Contact> header is "07012345678 @ domain", the value of the <Contact> header including the cookie information "cookie2" can be "07012345678-cookie2 @ domain". That is, as described in Table 2, the proxy apparatus 200 includes the cookie information in the <Contact> header and transmits it to the switching apparatus 100.

Upon receiving the registration request message, the switching device 100 confirms the registration request message, and in step S505, transmits to the proxy device 200 an authentication request message having parameters for authentication. The authentication request message may be a 401 Unauthorized message according to the SIP. The 401 Unauthorized message contains a parameter for authentication in the < WWW-Authenticate > header. The proxy device 200 serves as a proxy, and transmits the authentication request message to the terminal 400 in step S507.

The second terminal 402 extracts a parameter for authentication from the authentication request message, performs an operation using the extracted parameter, and obtains authentication data according to the operation result. The second terminal 402, which has obtained the authentication data, transmits the registration request message having the authentication data to the proxy device 200 again in step S509. According to SIP, a registration request message to be transmitted again can use a Register message. The registration request message to be transmitted again uses the same Register message as the registration request message transmitted in step S501, but further includes the authentication data. At this time, the authentication data is stored in the <Authorization> header and transmitted. The proxy device 200 transmits a register message to the switching device 100 again transmitted from the second terminal 402 in step S511 and transmits the register message including the cookie information to the <Contact> header of the register message . Accordingly, as described in Table 2, the value of the <Contact> header becomes "07012345678-cookie2 @ domain".

Upon receiving the registration request message, the switching device 100 confirms the authentication data of the registration request message and performs authentication. When the authentication is completed, the switching device 100 registers the second terminal 402. As described above, the second terminal 402 extracts necessary information from the registration request message and stores the registration information as shown in Table 1 below.

After registering the second terminal 402, the switching device 100 transmits a registration completion message to the proxy device 200 in step S513 and the proxy device 200 transmits a registration completion message to the second terminal 402 . According to SIP, the registration complete message may be a 200 OK message, to inform the second terminal 402 that registration is complete. As described above, the second terminal 402 can be registered in the switching device 100 through steps S501 to S515 (step S10).

Referring to steps S10 and S20 of FIG. 5, the third terminal 403 transmits the control signal to the switching device (not shown) in the same manner as the second terminal 402 through steps S521 to S533 (step S20) 100).

Referring to steps S10, S20, and S30 of FIG. 5, the fourth terminal 404 may perform steps S541 to S553 (step S30) corresponding to step S10 (S501 to S515) It can be registered in the switching device 100 in the same manner as the second terminal 402 or the third terminal 403.

5, only three terminals 402, 403 and 404 are described. However, this is an example for showing that a plurality of terminals 400 can be registered with the same identification number, It does not. If it is desired to register another terminal 400 with the same identification number, the above-described steps S501 to S515 can be repeated through the other terminal 400. [ In particular, when the terminal 400 desires to register with the same identification number, the terminal 400 can transmit the same by setting the identification number of the <Contact> header of the registration request message to the same. In this case, the proxy device 200 will give different cookie information to different terminals 400. [ In addition, when the same terminal 400 accesses the proxy apparatus 200 again via another IP, the proxy apparatus 200 can give different cookie information. Therefore, the switching device 100 can use a unique terminal identifier to identify the same terminal 400 having different cookie information. Accordingly, the switching device 100 can register with respect to a plurality of terminals 400 having the same identification number, and can register the plurality of terminals 400 having the same identification number separately through the cookie information and the terminal identifier .

6 is a flowchart illustrating a method for providing a call service to a plurality of terminals having the same identification number according to an embodiment of the present invention.

6, it is assumed that the switching device 100 is in the same state mode in which all of the terminals 400 registered with the same identification number are managed in the same state. 6, it is assumed that the first terminal 401 is the calling terminal and the second terminal 402 and the third terminal 403 are terminals 400 registered with the same identification number in the switching device 100. [

Referring to FIG. 6, in step S601, the first terminal 401 transmits a session connection request message to the switching device 100 for requesting a call with a specific terminal. The first terminal 401 receives the identification number of the terminal to which the first terminal 401 wants to talk in the session connection request message and transmits the same. Here, it is assumed that the identification numbers stored in the first terminal 401 are the same identification numbers registered by the second and third terminals 402 and 403. According to SIP, the session connection request message can be an INVITE message. That is, the first terminal 401 describes the identification number of the other party requesting the call connection to the INVITE message and transmits the same. The user of the first terminal 401 may not know whether the second terminal 402 and the third terminal 403 are registered with the same identification number. The first terminal 401 requests the second terminal 402 and the third terminal 402 to transmit the INVITE message to the second terminal 402. However, The terminal 403 specifies and transmits the same identification number.

Upon receiving the INVITE message, the switching device 100 receives the INVITE message in step S603, and transmits to the first terminal 401 a process continuation message indicating that the received INVITE message is being processed. It is preferable that the processing continuation message uses the 100 Trying message according to the SIP.

Next, the switching device 100 recognizes that the second and third terminals 402 and 403 are registered with the same identification number as previously assumed. Accordingly, the switching device 100 delivers an INVITE message to each of the second and third terminals 402 and 403. This process is as follows.

The switching device 100 forwards the INVITE message to the proxy device 200 in step S605. At this time, the switching device 100 transmits the INVITE message to the second terminal 402. That is, the switching device 100 may refer to the registration information and transmit the INVITE message by specifying that the recipient of the INVITE message is the second terminal 402. At this time, it is preferable that the switching device 100 use the <Request-URI> header of the INVITE message to indicate that the switching is to be delivered to the second terminal 402. Referring to <Table 1> and <Table 3>, the value described in the <Request-URI> header is a connection address value among the registration information for the second terminal 402. For example, "07012345678-cookie2 @ domain" can be described in the <Request-URI> header. This is the same as the value described in the <Contact> header of the Register message at the time of registration of the second terminal 402.

Upon receiving the INVITE message, the proxy device 200 receives the INVITE message in step S607 and transmits a 100 Trying message indicating that the received INVITE message is being processed to the switching device 100. [ Also, the proxy device 200 transmits an INVITE message to the second terminal 402 in step S609. At this time, the proxy device 200 can confirm that the second terminal 402 transmits the INVITE message through the <Request URI> header of the INVITE message received from the switching device 100.

The second terminal 402 having received the INVITE message receives the INVITE message in step S611 and transmits a 100 Trying message indicating that the received INVITE message is being processed to the proxy device 200. [ And the second terminal 402 may output a ring tone to notify the user that there is a call request. As described above, the ring tone is a means for notifying that there is a call connection request, and the ring tone has been described by way of example. However, the ring tone is not limited to the ring tone, and other means such as vibration may be substituted for the ring tone, It is natural to be able to.

The second terminal 402 transmits a 180 Ringing message to the proxy device 200 in step S613 and responds to the INVITE message. The 180 Ringing message is a session connection request confirmation message confirming that the session connection request has been received. The proxy device 200 transmits a 180 Ringing message to the switching device 100 in step S615 and the switching device 100 transmits a 180 Ringing message to the first terminal 401 in step S617. When the first terminal 401 receives the 180 Ringing message, it outputs a ring back tone. Accordingly, the user of the first terminal 401 can know that the session connection request has been transmitted to the terminal registered with the identification number requested by the first terminal 401, that is, the called terminal.

The switching device 100 may proceed to the following procedure for processing the INVITE message transmitted to the second terminal 402 and processing the INVITE message for the third terminal 403 at the same time.

The switching device 100 forwards the INVITE message to the proxy device 200 in step S619. At this time, the switching device 100 transmits the INVITE message to the third terminal 403. That is, the switching device 100 may refer to the registration information and transmit the INVITE message by specifying that the recipient of the INVITE message is the third terminal 403. At this time, as described in Table 3, the switching device 100 can use the <Request-URI> header of the INVITE message to specify that the switching device 100 transmits it to the third terminal 403. Referring to Table 1, the value described in the <Request-URI> header is a connection address value among the registration information for the third terminal 403. For example, "07012345678-cookie3 @ domain" can be described in the <Request-URI> header. This is the same as the value described in the < Contact > header of the Register message at the time of registration of the third terminal 403.

Upon receiving the INVITE message, the proxy device 200 receives the INVITE message in step S621 and transmits a 100 Trying message indicating that the received INVITE message is being processed to the switching device 100. [ The proxy device 200 transmits an INVITE message to the third terminal 403 in step S623. At this time, the proxy device 200 can confirm that the third terminal 403 is an object to which the INVITE message is to be transmitted by referring to the <Request URI> header of the INVITE message.

The third terminal 403 having received the INVITE message receives the INVITE message in step S625 and transmits a 100 Trying message to the proxy device 200 informing that the received INVITE message is being processed. After receiving the INVITE message, the third terminal 403 may output a ring tone to inform the user that there is a call request. In step S627, the third terminal 403 transmits a session connection request confirmation (180 Ringing) message to the proxy device 200 and responds to the INVITE message. The proxy device 200 transmits a 180 Ringing message to the switching device 100 in step S629. At this time, even when the switching device 100 receives the 180 Ringing message, it does not transmit the 180 Ringing message to the first terminal 401. The switching device 100 does not transmit the 180 Ringing message of the third terminal 403 since the 180 Ringing message previously transmitted from the second terminal 402 has already been transmitted to the first terminal 401. [ That is, since it is unnecessary to transmit the 180 Ringing message twice to the calling terminal, only one of a plurality of calling terminals having the same identification number is transmitted to the calling terminal.

The steps S605 and S609 of the switching device 100 and the proxy device 200 transmitting the INVITE message received from the first terminal 401 to the second terminal 402, 3 terminal 403 (steps S619 to 623) are denoted by the same reference numerals, but this is preferably performed simultaneously. Accordingly, steps S605 to S615 and steps S619 to S629 described above can be simultaneously performed.

As described above, the second terminal 402 and the third terminal 403 all output ring tones. In the state in which the second terminal 402 and the third terminal 403 output ring tones, the user of the terminal of either the second terminal 402 or the third terminal 403 Lt; RTI ID = 0.0 &gt; hook-off &lt; / RTI &gt; Here, it is assumed that a hook-off operation is detected at the second terminal 402. [

In this case, the second terminal 402 transmits a 200 OK message to the proxy device 200 in step S631. The 200 OK message is a session connection accept message for informing the acceptance of the session connection request. Upon receiving the 200 OK message, the proxy device 200 transmits a 200 OK message to the switching device 100 in step S633, and the switching device 100 transmits a 200 OK message to the first terminal 401 in step S635 .

In response to the 200 OK message, the first terminal 401 transmits an ACK message to the switching device 100 in step S637. The ACK message is a session connection acknowledgment message informing that the session connection acceptance has been confirmed in response to the session connection acceptance message. Upon receiving the ACK message, the switching device 100 transmits an ACK message to the proxy device 200 in step S639. At this time, similarly to the case of transmitting the INVITE message (step S605), it is specified that the transmission destination of the ACK message is the second terminal 402 by using the <Request URI> header of the ACK message. Therefore, the proxy apparatus 200 receiving the ACK message can also confirm that the second terminal 402 transmits the ACK message by referring to the <Request URI> header of the ACK message. Accordingly, the proxy device 200 transmits an ACK message to the second terminal 402 in step S641. Thus, a session between the first terminal 401 and the second terminal 402 is connected, and the first terminal 401 and the second terminal 402 can communicate with each other through a session connected in step S643.

Meanwhile, in step S645, the switching device 100 transmits a session cancellation request message to the proxy device 200 so that the session can be delivered to the third terminal 403 that is not connected to the session. The session cancellation request message is for canceling the session connection request, and the CANCEL message can be used according to the SIP. The switching device 100 specifies the transmission destination of the CANCEL message as the third terminal 403 by using the <Request URI> header of the CANCEL message as in the case of transmitting the INVITE message (step S605). Therefore, the proxy apparatus 200 that has received the CANCEL message can confirm that the third terminal 403 transmits the CANCEL message by referring to the <Request URI> header of the CANCEL message. Accordingly, the proxy device 200 forwards the CANCEL message to the third terminal 403 in step S647.

The third terminal 403 transmits a 200 OK message to the proxy device 200 in response to the CANCEL message in step S649. Here, the 200 OK message is a session cancellation request confirmation message for confirming a session cancellation request. The proxy device 200 forwards the 200 OK message to the switching device 100 in step S651.

Meanwhile, the third terminal 403 responds to the CANCEL message with a 200 OK message, but has not yet responded to the INVITE message transmitted by the first terminal 401. Accordingly, the third terminal 403 transmits a session connection failure message to the proxy device 200 in step S653. The session connection failure message may use the 487 Request Canceled message, depending on the SIP. The proxy device 200 forwards the 487 Request Canceled message to the switching device 100 in step S655.

The switching device 100 that has received the 487 Request Canceled message has a response to the 487 Request Canceled message on behalf of the first terminal 401 because the first terminal 401 has already made a session connection with the second terminal 402 do. Accordingly, the switching device 100 transmits a session connection failure confirmation message to the proxy device 200 in response to the 487 Request Canceled message in step S657. The session connection failure confirmation message indicates confirmation of termination of the session connection procedure, and an ACK message can be used according to the SIP. When transmitting the ACK message, the switching device 100 specifies the third terminal 403 to transmit the ACK message using the <Request URI> header of the ACK message. Accordingly, the proxy device 200 confirms the transmission destination of the ACK message through the < Request URI > header in step S659, and transmits the ACK message to the third terminal 403. Thereby, the session connection between the first terminal 401 and the third terminal 403 is not established, and the session connection procedure is completely terminated. At this time, the third terminal 403 is in the state-identical mode, and the switching apparatus 100 manages the third terminal 403 in a busy state until the second terminal 402 terminates the call.

On the other hand, when the user of the second terminal 402 inputs an end of the call, the second terminal 402 transmits a session release request message to the proxy device 200 in step S661. The session release request message is for requesting the release of the session connection. The session release request message may use a BYE message according to the SIP. The proxy device 200 transmits the BYE message to the switching device 100 in step S663 and the switching device 100 transmits the BYE message to the first terminal device 401 in step S665.

In response to the session release request message, the first terminal (401) receiving the BYE message transmits a session release acceptance message to the switching device (100) informing that the session release is accepted in step S667. This session release acceptance message may use the 200 OK message according to the SIP. The switching device 100 forwards the 200 OK message to the proxy device 200 in step S669. When transmitting the 200 OK message, the switching device 100 specifies the second terminal 402 to transmit the 200 OK message using the <Request URI> header of the 200 OK message. Accordingly, the proxy device 200 forwards the 200 OK message to the second terminal 402 in step S671. Thereby, the session connection between the first terminal 401 and the second terminal 402 is released.

As described above, according to one aspect of the present invention, an INVITE message is transmitted to all the called terminals having the same identification number in the same state mode, and all the called terminals output ring tones. This is a means for notifying the user that a call request is being made. Also, any one of the terminals, which has a hook-off operation in which the user accepts a call connection, is connected to a session with the calling terminal, and a call is made according to the session connection.

As described above, according to one aspect, by managing a plurality of terminals with the same identification number, a call connection can be requested to a plurality of terminals used by a specific user, and a user using a plurality of terminals can carry , And can respond to the call request of the other party through the closest accessible terminal. Accordingly, the terminal to which the session is not connected is managed in a state of being in a call state until the call of the terminal to which the session is connected is terminated. This has the advantage that a plurality of terminals can be managed consistently from the viewpoint of the user. That is, a plurality of terminals can be registered with the same identification number, and a plurality of terminals registered with the same identification number can be managed as one call service target. In addition, since the call service is a VoIP service based on packet switching, it is possible to unify and manage terminals supporting various types of VoIP. For example, by providing the VoIP service of the general desktop computer and the portable terminal with the same identification number, the VoIP service can be provided to the user's desired device. Accordingly, various devices supporting VoIP can be unified and managed from the viewpoint of the user.

According to another aspect of the present invention, the switching device 100 can operate in a state separation mode in which the terminals 400 registered with the same identification number are managed in different states. In the state separation mode, even when one of the terminals 400 is on the call, the other terminal 400 can receive and originate the call. In the state separation mode, when the switching device 100 receives an INVITE message requesting a call connection to a plurality of terminals 400 having the same identification number, the switching device 100 determines whether there is a terminal in the plurality of terminals 400 . At this time, when the user is in a call, the switching device 100 supervises the session connection for the call of the terminal 400, so that the terminal 400 can recognize that the terminal 400 is busy. In addition, since the terminal 400 registered with the same identification number can be distinguished through the cookie information and the terminal identifier, the state of the terminal in the call can be separately managed. In this way, the switching device 100 can recognize the status of each of the terminals 400 registered with the same identification number. Accordingly, in the state separation mode, the switching device 100 does not transmit an INVITE message to a terminal in a call among a plurality of terminals 400 registered with the same identification number.

For example, it is assumed that there are three second to fourth terminals 402, 403 and 404 in the terminal 400 having the same identification number, and the fourth terminal 404 is in the middle of the communication. It is also assumed that there is a session connection request for a terminal having an identification number commonly used by the second to fourth terminals 402, 403, and 404. In this case, the switching device 100 transmits the INVITE message only to the two second and third terminals 402 and 403, which are not in a communication state. The rest of the procedure is the same as the procedure in the same state mode described in FIG.

In this manner, in the state separation mode, the switching device 100 can manage each of the terminals 400 registered with the same identification number in different states. Therefore, the switching apparatus 100 can provide a call service so that at least one of the other called terminals can establish a session with the calling terminal and make a call even when one of the called terminals having the same identification number is on a call. For example, it is assumed that a desktop computer into which an application supporting VoIP is implanted is used by all the family members, and each family member has a portable terminal supporting VoIP. When the portable terminal is registered with the same identification number as the desktop computer and one of the family members, the device can be divided and used by a plurality of users as needed, thereby enabling efficient use of the device. This may be a suitable method when a plurality of calls are to be performed in parallel using a plurality of called terminals. Particularly, the state separation mode is more advantageous when a plurality of terminals are jointly used by a plurality of users.

7 is a flowchart illustrating a method for providing a call service to a plurality of terminals having the same identification number in a switching device according to an embodiment of the present invention.

In FIG. 7, the calling terminal corresponds to the first terminal 401, and the called terminal corresponds to the second to fourth terminals 402, 403, and 404.

Referring to FIG. 7, in step S701, the switching device 100 receives a session connection request message for requesting a call connection to a called terminal having a specific identification number. The session connection request can be made through the INVITE message.

In step S703, the switching device 100 confirms whether there are a plurality of destination terminals registered with the identification number described in the INVITE message.

If it is determined in step S703 that there is only one called terminal registered with the same identification number, the switching device 100 proceeds to step S705 and provides a call connection service according to a general procedure.

On the other hand, if it is determined in step S703 that there are a plurality of destination terminals registered with the same identification number, the switching device 100 determines whether the destination terminal is in the same state mode in which the same communication service is provided to a plurality of destination terminals registered with the same identification number in step S707 Or discriminates a plurality of destination terminals registered with the same identification number by the cookie information and the terminal identifier and judges whether or not it is a state separation mode for providing a communication service.

As a result of the determination in step S707, in the same mode, the switching device 100 transmits a session connection request message to all the called terminals registered with the same identification number in step S709. For example, if there are three called terminals registered with the same identification number, a session connection request message is transmitted to each of the called terminals. The session connection request message may be an INVITE message according to the SIP, and the switching device 100 may use the <Request URI> header of the INVITE message to transmit the INVITE message to each called terminal. In the transmission of the SIP message, the division of the plurality of terminals 400 registered with the same identification number by using the < Request URI > header is the same as described with reference to Table 3 above.

On the other hand, if it is determined in step S707 that the mode is the state separation mode, the switching device 100 transmits the session connection request message to all the receiving terminals not in the busy state among the plurality of the called terminals registered with the same identification number in step S711. For example, assuming that there are three called terminals registered with the same identification number, and one of the called terminals is busy, the terminal can transmit a session connection request message to each of the remaining two called terminals.

As described above, the switching apparatus 100 can distinguish each incoming terminal through the cookie information and the terminal identifier. Accordingly, the switching device 100 can transmit a session connection request message to each of the destination terminals in steps S709 and S711.

As the session connection request message is transmitted, the switching device 100 can receive a session connection request confirmation message from each of the called terminals receiving the session connection request message. The session connection request acknowledgment message can use the 180 Ringing message according to the SIP. Accordingly, upon receiving at least one 180 Ringing message in step S713, the switching device 100 transmits one of the 180 Ringing messages received in step S715 to the calling terminal. When it is not necessary to transmit the 180 Ringing message to two or more calling terminals, it is preferable that only one of the 180 Ringing messages is transmitted when a 180 Ringing message is received from a plurality of receiving terminals. On the other hand, if the switching device 100 does not receive at least one session connection request confirmation message in step S713, the switching device 100 informs the calling terminal that the session connection has failed in step S729, and terminates the session connection procedure.

In addition, by transmitting the session connection request message, the switching device 100 can receive the session connection request acceptance message from each of the receiving terminals that received the session connection request message. The session connection request accept message may use the 200 OK message according to the SIP. Accordingly, when the switching device 100 receives the 200 OK message from any of the called terminals that received the session connection request message in step S717, the switching device 100 proceeds to step S719. On the other hand, if the switching device 100 does not receive the 200 OK message in step S717, the switching device 100 informs the calling terminal that the session connection has failed in step S729, and terminates the session connection procedure.

In step S719, the switching device 100 receiving the session connection request acceptance (200 OK) message establishes a session connection between the calling terminal and the called terminal that transmitted the 200 OK message. This corresponds to steps S631 to S643 described above.

Then, in step S721, the switching device 100 ends the session connection procedure of all the called terminals that have not transmitted the session connection request acceptance message. This is the same as steps S645 to S659 described above.

In step S723, the switching device 100 determines whether the call is terminated between the calling terminal and the called terminal connected to the session. If it is determined that the call is not terminated, the switching device 100 waits until the call is terminated in step S725. On the other hand, if the call is terminated as a result of the check, the switching device 100 cancels the session connection between the calling terminal and the calling terminal connected to the called terminal in step S727. This corresponds to steps S661 to S671 described above.

According to the embodiment of the present invention as described above, in the same state mode, the same call service is provided to a plurality of terminals through the same identification number so that a user can manage a plurality of terminals equally. Further, the system is switched to the state separation mode as necessary, and a plurality of terminals are distinguished through the cookie information and the terminal identifier to provide a call service, thereby enabling the user to use the apparatus efficiently.

For example, in the case of an enterprise subscriber, a single user may use a portable FMC terminal, a fixed-type wired IP phone installed in the company, a Unified Communication (PC) softphone or the like, and register the plurality of terminals with one identification number The user can make necessary communication with one identification number or perform necessary work even when the user is in the vicinity or outside of the office. Accordingly, the user can manage a plurality of terminals with one identification number, thereby providing convenience to the business. In addition, if necessary, a plurality of users can use the stationary terminal installed in the company, thereby making it possible to efficiently use the terminal.

A method for providing a call service to a plurality of terminals having the same identification number in a switching device according to an embodiment of the present invention may be implemented in a form of a program readable by various computer means and recorded in a computer- have. Here, the recording medium may include program commands, data files, data structures, and the like, alone or in combination. Program instructions to be recorded on a recording medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. For example, the recording medium may be a magnetic medium such as a hard disk, a floppy disk and a magnetic tape, an optical medium such as a CD-ROM or a DVD, a magneto-optical medium such as a floppy disk magneto-optical media, and hardware devices that are specially configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions may include machine language code such as those generated by a compiler, as well as high-level language code that may be executed by a computer using an interpreter or the like. Such a hardware device may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art. It is self-evident to those who have. Furthermore, although specific terms are used in this specification and the drawings, they are used in a generic sense only to facilitate the description of the invention and to facilitate understanding of the invention, and are not intended to limit the scope of the invention.

The present invention relates to a system for providing a call service to a plurality of terminals having the same identification number, an apparatus therefor, and a method therefor, and more particularly to a system for registering a plurality of terminals with the same identification number, The terminal can be managed as one call service target. In the embodiment of the present invention, the call service is a VoIP service based on packet switching. Accordingly, a terminal supporting various VoIP types can be unified and managed. For example, by providing the VoIP service of the general desktop computer and the portable terminal with the same identification number, the VoIP service can be provided to the user's desired device. Accordingly, various devices supporting VoIP can be unified and managed from the viewpoint of the user. In addition, since the terminals managed with the same identification number can be separately managed through the cookie information and the terminal identifier, each terminal can be used separately if necessary. For example, it is assumed that a desktop computer into which an application supporting VoIP is implanted is used by all the family members, and each family member has a portable terminal supporting VoIP. When the portable terminal is registered with the same identification number as the desktop computer and one of the family members, the device can be divided and used by a plurality of users as needed, thereby enabling efficient use of the device. Also, in the case of an enterprise subscriber, a single user may use a portable FMC terminal, a fixed wired IP phone installed in the company, or a UC (Unified Communication) PC softphone, and registers the plurality of terminals with one identification number The user can make necessary communication with one identification number or perform necessary work even when the user is in the vicinity or outside of the office. Accordingly, the user can manage a plurality of terminals with one identification number, thereby providing convenience to the business. In addition, if necessary, a plurality of users can use a stationary terminal installed in the company, thereby making it possible to efficiently use the terminal. This is not only a possibility of commercialization or sales, but also a possibility of being industrially applicable since it is practically possible to repeatedly carry out clearly.

100: Switching device
110: communication module 120: storage module
130: Registration module 140: Control module
200: Proxy device
210: communication unit 220: storage unit
230: control unit
400: terminal
401: first terminal 402: second terminal
403: third terminal 404: fourth terminal
410: communication unit 420: wireless communication unit
421: Wireless network communication unit 422: Wireless LAN communication unit
423: Wireless fan communication unit 430: Wired communication unit
440: Input unit 450: Output unit
451: Display device 453: Audio device
460: Storage unit 470: Control unit

Claims (19)

delete A communication module for transmitting and receiving data;
A registration module for registering a plurality of terminals corresponding to any one identification number; And
If a session connection request message for the identification number is received from any one of the terminals through the communication module, it is checked whether there are a plurality of terminals registered corresponding to the identification number through the registration module, If the mode set in correspondence with the identification number is in the same state mode after confirming the mode set in correspondence with the identification number, registration is made so as to establish a session connection with each terminal registered corresponding to the identification number, And transmits the session connection request message to the proxy device,
If the mode set in correspondence with the identification number is in the state separation mode, a session connection request for specifying the remaining terminals to be established with respect to the terminals registered in correspondence with the identification number, And a control module for controlling the forwarding of the message to the proxy device. The switching device for providing a call service to a plurality of terminals having the same identification number. delete delete 3. The apparatus of claim 2, wherein the control module
When receiving the session connection request acceptance message accepting the session connection in response to the session connection request message through the proxy device, transmits the session connection request acceptance message to the terminal that transmitted the session connection request message, And providing a session connection between the plurality of terminals having the same identification number. 3. The apparatus of claim 2, wherein the control module
When receiving a session connection request acceptance message accepting a session connection in response to the session connection request message through the proxy device, a session connection procedure with the remaining terminals except for the corresponding terminal that transmitted the received session connection request accept message, And terminating the call connection to the plurality of terminals having the same identification number. 3. The method of claim 2, wherein the registration module
Wherein when the registration request message is received from each of the plurality of terminals, the terminal extracts the identification number, the cookie information, and the terminal identifier from the received registration request message to register each of the plurality of terminals. A switching device for providing a call service. 3. The apparatus of claim 2, wherein the switching device
And a storage module for storing the registration information by mapping the cookie information and the terminal identifier of each of the terminals having the same identification number to the plurality of terminals having the same identification number. The method of claim 8, wherein the cookie information includes
And a proxy device for relaying a message between the switching device and the plurality of terminals to assign the terminals having the same identification number to each other. A communication unit for communication with a switching device and a plurality of terminals; And
When receiving a registration request message requesting registration with the same identification number from the plurality of terminals, assigns the cookie information so that the plurality of terminals are divided, and transmits a registration request message including the provided cookie information to the communication unit When a session connection request message specifying a target of each of the plurality of terminals is transmitted from the switching device according to a mode check result set corresponding to an identification number in the switching device, And a control unit for controlling the session connection to be established or controlling a session connection to be established with each of the remaining terminals except the terminal in a busy state. Lt; / RTI &gt; 11. The method of claim 10,
The registration request message is a Register message according to SIP,
The control unit
And transmits the cookie information to the switching device by including the cookie information in the <Contact> header of the Register message. 11. The apparatus of claim 10, wherein the control unit
When the message transmitted from the switching device to one of the plurality of terminals is received, the object is identified by referring to the cookie information, and the message is transmitted to the separated object through the communication unit To provide a call service to a plurality of terminals having the same identification number. 11. The system of claim 10, wherein the proxy device
And a storage unit for mapping the identification number and the cookie information for each of the plurality of terminals, and storing the mapped identification number and the cookie information for each of the plurality of terminals. Receiving a session connection request message for requesting a session connection from a calling terminal to a called terminal having a specific identification number, confirming whether the called terminal has the identification number;
If the number of the called terminals registered as the identification number is greater than the number of the called terminals registered in the identification number, whether the same call mode is provided for the plurality of called terminals or in the state separation mode ;
Transmitting a session connection request message specifying each of the plurality of destination terminals to the proxy device and transmitting the session connection request message to each of the destination terminals specified as a target, if the mode is the same; And
And establishing a session connection between any one of the called terminals and the originating terminal that has transmitted the received session connection request acceptance message upon receiving the session connection request acceptance message accepting the session connection through the proxy device The method comprising the steps of: (a) providing a call service to a plurality of terminals having the same identification number of a switching device. 15. The method of claim 14,
As a result of the determination, in the state separation mode, a session connection request message specifying each of the plurality of destination terminals, excluding the called destination terminal, is transmitted to the proxy device and is transmitted to each of the destination terminals specified as the target step; And
And establishing a session connection between any one of the called terminals and the calling terminal that has transmitted the received session connection request accept message upon receiving the session connection request acceptance message accepting the session connection, A method for providing a call service to a plurality of terminals having the same identification number of a switching device. 16. The method as claimed in claim 14 or 15,
Wherein the control unit identifies the plurality of destination terminals by using at least one of the cookie information and the terminal identifier and transmits the session connection request message by specifying each of the separated destination terminals as the target. The method comprising the steps of: 16. The method according to claim 14 or 15,
The session connection request message is an INVITE message according to SIP,
Wherein the step of transmitting includes transmitting the INVITE message to each of the specified destination terminals by specifying the target of the destination terminal in the < Request URI > header of the INVITE message. A method for providing a call service to a plurality of terminals. 16. The method according to claim 14 or 15,
And terminating the session connection procedure of the called terminal except for any one of the called terminals that has transmitted the session connection request accept message to the plurality of terminals having the same identification number. Methods for providing. 16. The method according to claim 14 or 15, wherein after the transmitting step, before the setting step,
Receiving a session connection request confirmation message for confirming the session connection request from at least one destination terminal and forwarding any one of the received session connection request confirmation messages to the calling terminal, A method for providing a call service to a plurality of terminals having the same identification number of a device.

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