KR20120035580A - 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 the same identification number, cookie information assigned to each, and each unique information. A plurality of terminals registered in the switching device with one terminal identifier; A proxy device for providing cookie information to distinguish each of the plurality of terminals; 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. It is possible to provide a communication system, and apparatus and method according thereto. The present invention registers and manages a plurality of terminals with the same identification number, and provides the same call service, thereby providing a convenience for the user to manage the plurality of terminals with one identification number, and providing cookie information and By providing a call service by distinguishing a plurality of terminals through a terminal identifier, a user can efficiently use the device.

Description

System for present communication service to a plurality of terminals having same identification number, apparatus approximately, server approximately and method

The present invention relates to a technology for providing a call service, and provides the same identification number to a plurality of terminals, and provides the same call service to all of the plurality of terminals, but provides a communication service by dividing each of the plurality of terminals as necessary. A system, an apparatus therefor and a method therefor.

Voice Over IP (VoIP) is a term that refers to Internet Protocol (IP) telephony technology for a series of facilities that use IP to deliver voice information. In general, this means that voice information is sent in digital form within discrete packets, rather than a traditional protocol based on a circuit, such as a public switched telephone network (PSTN). The main advantage of VoIP and Internet telephony technology is that it integrates telephone service by utilizing existing IP network, allowing telephone users to receive long-distance and international phone service in internet and intranet environment with only local call charge.

VoIP has been evolved through the VoIP Forum to encourage the use of ITU-T H.323, a 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 encouraged directory service standards, enabling users to locate other users and enabling the use of touch phone signals for automatic telephone distribution and voicemail.

In addition to the original IP functionality, VoIP uses Real Time Protocol (RTP) to support packets arriving in a timely manner. With public networks, it is currently difficult to guarantee quality of service (QoS). Better service can be achieved by using a private company or a private network managed by an Internet telephony service provider (ITSP).

On the other hand, due to the development of the network for all IP, not only fixed terminals but also portable terminals support calls based on VoIP. And more and more kinds of terminals are adopting VoIP technology. Typical examples of fixed terminals supporting VoIP are so-called "soft phones," including Internet telephones used in homes, and desktop computers or laptops with applications installed to support communication via VoIP. Computer. In addition, in the case of a portable terminal, a technology such as Fixed Mobile Convergence (FMC) is supported, and thus, when accessing an IP network through the portable terminal, a communication service through VoIP can be supported. As such, the types of terminals that can use VoIP are increasing, and users generally have at least one fixed terminal and a portable terminal, and most of the terminals provided by the user are expected to provide VoIP services in the future. do. Therefore, when one user has a plurality of VoIP terminals, when a plurality of users jointly use the plurality of VoIP terminals, research is required to provide a VoIP call service to the plurality of terminals.

Accordingly, an object of the present invention in view of the above-described demands is a system capable of equally providing a call service to a plurality of terminals with a single target by binding a plurality of terminals with the same identification number, an apparatus therefor, and a method therefor. In providing.

In addition, another object of the present invention is to provide a consistent one call service by binding a plurality of terminals to the same identification number, if necessary, a system that can provide a call service by distinguishing each of the plurality of terminals, an apparatus therefor and In providing a method.

Communication system for providing a call service to a plurality of terminals having the same identification number in accordance with a preferred embodiment of the present invention for achieving the above object is the same identification number, each cookie information and each unique A plurality of terminals registered in the switching device by the terminal identifier; A proxy device for assigning the cookie information to distinguish each of the plurality of terminals; 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 a preferred embodiment of the present invention for achieving the above object, a switching device for providing a call service to a plurality of terminals having the same identification number communication module for transmitting and receiving data; A registration module for registering a plurality of terminals with the same identification number and separately registering each of the plurality of terminals by cookie information given 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 a call service to the plurality of terminals in the same manner through the same identification number, or provides a call service by distinguishing the plurality of terminals through at least one of the cookie information and the terminal identifier. do.

When the control module provides the same call service, if the control module receives a session connection request message for requesting a session connection for a terminal registered with the identification number from a specific terminal, the session connection specified for each of the plurality of terminals is targeted. The request message is transmitted to the proxy apparatus, so that the terminal is transmitted to each of the target terminals.

When the control module classifies the plurality of terminals and provides a call service, when the control module receives a session connection request message for requesting a call with respect to a terminal registered with the identification number from a specific terminal, the terminal in call among the plurality of terminals It is characterized in that the session connection request message specified for each terminal except for the transfer to the proxy device, to be transmitted to each terminal specified as the target.

The control module provides a session connection between any one terminal that has received the received session connection request acceptance message and the specific terminal when receiving the session connection request acceptance message that accepts the session connection through the proxy device. It is done.

When the control module receives the session connection request acceptance message for accepting the session connection through the proxy device, the control module terminates the session connection procedure of the other terminals except for any one terminal that has transmitted the received session connection request acceptance message. It is characterized by.

The registration module receives a registration request message of each of the plurality of terminals, and 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 may further include a storage module configured to store the same identification number of each of the plurality of terminals, cookie information of each of the plurality of terminals, and registration information to which terminal identifiers of each of the plurality of terminals are mapped.

The cookie information may be a value assigned by the proxy apparatus for relaying a message between the switching device and the plurality of terminals to distinguish each of the plurality of terminals.

According to a preferred embodiment of the present invention for achieving the above object, a proxy device for providing a call service to a plurality of terminals having the same identification number includes a switching device and a communication unit for communication with the terminal; And receiving a registration request message requesting registration with the same identification number from the plurality of terminals, assigning cookie information to distinguish each of the plurality of terminals, and sending a registration request message including the assigned cookie information to the communication unit. And a control unit for transmitting to the switching device through.

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

When the control unit receives a message transmitted to any one of the plurality of terminals from the switching device as a target, the control unit classifies the target with reference to the cookie information, and transmits the message to the classified target through the communication unit. It is characterized by transmitting.

The proxy apparatus may further include a storage unit which maps and stores the identification number and the cookie information for each of the plurality of terminals.

Method for providing a call service to a plurality of terminals having the same identification number of the switching device according to a preferred embodiment of the present invention for achieving the above object is a session for the called terminal having a specific identification number from the originating terminal When receiving a session connection request message for requesting connection, checking whether a plurality of destination terminals having the identification number are present; If there is a plurality of destination terminals registered with the identification number as a result of the check, whether the same state mode provides the same call service to the plurality of destination terminals, or whether the state separation mode provides the call service by dividing the plurality of terminals. Determining; If the determination result, in the same state mode, transmitting a session connection request message for each of the plurality of destination terminals to the proxy device to be transmitted to each destination terminal specified as the target; And when receiving a session connection request acceptance message for accepting the session connection through the proxy apparatus, establishing a session connection between any one of the called terminal and the originating terminal that has received the received session connection request acceptance message. do.

After the determining, the determination result, in the state separation mode, the destination terminal specified as a target by transmitting a session connection request message for each of the destination terminals other than the called terminal among the plurality of destination terminals to the proxy apparatus. Sending to each; And when receiving a session connection request acceptance message for accepting the session connection, establishing a session connection between any one of the called terminal and the originating terminal that has received the received session connection request acceptance message.

The transmitting may include identifying the plurality of destination terminals by using at least one of cookie information and the terminal identifier, and transmitting the session connection request message by specifying each of the distinguished destination terminals.

The session connection request message is an INVITE message according to SIP, and the step of transmitting indicates that each of the called terminal is targeted in the <Request URI> header of the INVITE message, so that the INVITE message is delivered to each of the specified called terminals. Characterized in that.

After the setting, the step of terminating the session connection procedure of the destination terminal, except for any one of the destination terminal that transmitted the session connection request acceptance message; further includes.

After the step of transmitting, before the setting step, if receiving a session connection request confirmation message from the at least one destination terminal confirming the session connection request, any one of the received session connection request confirmation message is transmitted to the calling terminal. It further comprises ;.

According to the embodiment of the present invention as described above, by registering a plurality of terminals with the same identification number, it is possible to target a plurality of terminals registered with the same identification number as one call service. In an embodiment of the present invention, the call service is a VoIP service based on packet switching. Accordingly, a call service may be provided to a terminal supporting various types of VoIP through one identification number. For example, by providing VoIP services of a desktop computer and a portable terminal, which are fixed terminals, with the same identification number, a call service according to VoIP can be provided to a device desired by a user. In addition, from the user's point of view, it is possible to integrate and manage various devices supporting VoIP in one identification number. And the terminal managed by the same identification number can be managed separately 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 member of the family has a portable terminal supporting VoIP. When the portable terminal of one of the desktop computer and the family member is registered with the same identification number, the devices can be divided and used by a plurality of users as needed to efficiently use the device.

In addition, in the case of a company subscriber, one user can use a portable FMC terminal, a fixed wired IP phone installed in the company, a Unified Communication (UC) PC soft phone, and the like, and register the plurality of terminals with one identification number. In the case of using the user, even when the user is in the office or on the road, a single identification number can be used to make contact or perform necessary tasks. Therefore, the user can manage the plurality of terminals with one identification number, and can provide convenience to the work. And if necessary, by using a fixed terminal installed in a company by a plurality of users, it is possible to efficiently use the terminal.

In summary, by registering and managing a plurality of terminals with the same identification number, by providing the same call service, the user provides convenience to manage the plurality of terminals with a single identification number, cookie information and terminals as necessary By providing a call service by distinguishing a plurality of terminals through the identifier, the user can efficiently use the device.

1 is a view 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.
2 is a view 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 the configuration of a proxy device of a communication system according to an embodiment of the present invention;
4 is a view for explaining the configuration of a terminal of a communication system according to an embodiment of the present invention.
5 is a flowchart illustrating a procedure of registering a plurality of terminals having the same identification number with 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 of 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. However, in the following description and the accompanying drawings, detailed descriptions of well-known functions or configurations that may obscure the subject matter of the present invention will be omitted. In addition, it should be noted that like elements are denoted by the same reference numerals as much as possible throughout the drawings.

The terms or words used in the specification and claims described below should not be construed as being limited to the ordinary or dictionary meanings, and the inventors are appropriate to the concept of terms in order to explain their invention in the best way. It should be interpreted as meanings and concepts in accordance with the technical spirit of the present invention based on the principle that it can be defined. Therefore, the embodiments described in the present specification and the configuration shown in the drawings are only the most preferred embodiments of the present invention, and do not represent all of the technical ideas of the present invention, and various alternatives may be substituted at the time of the present application. It should be understood that there may be equivalents and variations.

1 is a view 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.

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

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

The switching device 100 is basically for providing a call service according to VoIP. The call service is a service that connects the terminal 400 and the terminal 400 to communicate with each other, and includes a voice call and a video call. To this end, 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 means whether the terminal 400 is available for call.

The switching device 100 connects a session between the calling terminal and the called terminal in order 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 the SIP. In order to guarantee the quality of the call service according to the VoIP, the session connection is dedicated to allocating transmission resources between the calling terminal and the called terminal. That is, the switching device 100 is a device that performs packet switching according to VoIP, and may be implemented through a soft switch. Specifically, when the calling terminal requests a session connection with the called terminal for a call, the switching device 100 transmits a session connection request to the called terminal, and when the called terminal accepts the call, between the calling terminal and the called terminal. Dedicated transmission resources can be allocated to establish a session connection.

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

The calling terminal may request a session connection for a call with a called terminal registered with a 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 may transmit a session connection request of the calling terminal to all 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. The switching device 100 may connect a session between any one of the called terminal and the calling terminal that accepts the session connection in response to the session connection request.

The proxy device 200 serves as a proxy between the terminal 400 and the switching device 100. When the terminal 400 intends to register with the switching device 100, the proxy device 200 may relay a message for registration between the switching device 100 and the terminal 400. In addition, when the switching device 100 intends to provide a call service to the terminal 400, the proxy device 200 may relay a message necessary for this to the switching device 100 and the terminal 400. As such, the proxy device 200 prevents the terminal 400 from directly connecting to the switching device 100, thereby preventing the exposure of the switching device 100. In addition, there is a function that can prevent abnormal packets such as various DoS, and can perform a smooth communication transfer function with the terminal in a NAT (Network Address Translation) environment. The proxy device 200 may be implemented through session border controller (SBC) equipment.

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

Referring to FIG. 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 may transmit and receive various 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, 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. Through the terminal 400 may be transmitted.

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

Terminal Identification number IP address port Contact address Terminal identifier Second terminal 070-12345678 IP of the second terminal or IP of the proxy device 5060 sip: 07012345678-cookie2 @ domain User-Agent header value of the second terminal Third terminal IP of third terminal or IP of proxy device 5060 sip: 07012345678-cookie3 @ domain User-Agent header value of the third terminal Fourth terminal IP of terminal 3 or IP of 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 to register with the switching device 100, and the registration request message may be a register message according to the SIP. When the proxy device 200 receives the Register message, the proxy device 200 additionally describes the cookie information provided 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 from the proxy device 200 through the communication module 110. When the registration module 130 permits registration, the registration module 130 extracts necessary information from the Register message and sends the registration information to the storage module 120. Can be stored.

Table 2 below is for explaining the main header of the Register message transmitted to the switching device 100 by the proxy device 200 according to an embodiment of the present invention.

Terminal To From Contact Second terminal Sip: 07012345678 @ domain Sip: 07012345678 @ domain Sip: 07012345678-Cookie2 @ domain Third terminal Sip: 07012345678 @ domain Sip: 07012345678 @ domain Sip: 07012345678-Cookie3 @ domain 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, in the Register message, the identification number and domain of the terminal 400 requesting registration are described in both the <To> and <From> headers.

The <Contact> header consists of an identification number and a domain. For example, assuming that the value of the <Contact> header transmitted from the terminal 400 to the proxy device 200 is “07012345678 @ domain”, the identification number is “07012345678.” In this case, the proxy device 200 may read <Contact>. The value of the header includes the cookie information assigned to each terminal 400. In this way, the value of the <Contact> header including the cookie information becomes a connection address in Table 1. The agent given by the proxy apparatus 200 is assigned. If the cookie information of the second terminal 402 is "cookie2", the proxy apparatus 200 transmits the cookie information including "cookie2" in the <Contact> header of the Register message, as described in Table 2. 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 and stores the access address, “07012345678-cookie2 @ domain” from the <Contact> header of the received Register message, and identifies the identification number. In addition, as shown in <Table 1> and <Table 2>, the third terminal 403 and the fourth terminal 404 may store the registration information in the same manner.

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

The port means a port number to be used for data transmission and reception, and is described in a register message of each terminal 400. The registration module 130 may extract such a port number from a register message and store it in registration information.

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

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

As described above, the registration module 130 performs registration of the terminal 400. At this time, the registration module 130 allows the registration of a plurality of terminals 400 having the same identification number, and to distinguish each terminal 400, as described with reference to Table 1, cookie information and the terminal Identifiers can be used. In addition, the registration module 130 may exchange a message required for registration with the terminal 400 for registration.

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

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 may manage the plurality of terminals 400 having the same identification number using the registration information described in Table 1 below. In particular, the control module 140 may provide the same call service to the plurality of terminals 400 registered with the same identification number. In addition, the control module 140 may distinguish the plurality of terminals 400 registered with the same identification number through the registration information described in Table 1 through the cookie information and the terminal identifier. Therefore, the control module 140 may provide a call service by dividing the plurality of terminals 400 through cookie information and a terminal identifier. For convenience of description, providing the call service to the plurality of terminals 400 in the same state is called the same state mode, and providing the call service by dividing the plurality of terminals 400 is called the state separation mode. In the same state mode, the switching device 100 manages all other terminals in a call state when any one of a plurality of terminals 400 having the same identification number is in a call. In addition, in the state separation mode, the switching device 100 may perform the call and the call respectively, regardless of the busy state of each of the plurality of terminals 400 having the same identification number.

The control module 130 may transmit the same SIP message to each of the plurality of terminals 400 registered with the same identification number, and may separately transmit each of 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 Second terminal Sip: 07012345678 @ domain Sip: Identification number of originating terminal @ from domain Sip: 07012345678-Cookie2 @ domain Third terminal Sip: 07012345678 @ domain Sip: Identification number of originating terminal @ from domain Sip: 07012345678-Cookie3 @ domain Fourth terminal Sip: 07012345678 @ domain Sip: Identification number of originating terminal @ from domain Sip: 07012345678-Cookie4 @ domain

Referring to Table 3, the plurality of terminals 400 registered with the same identification number are the second to fourth terminals 402, 403, and 404, and the first terminal 401 is the second to fourth terminals ( Assume a situation of requesting a call connection with 402, 403, 404.

The control module 140 describes the header of the SIP message transmitted by the first terminal 401 as described in <Table 3>, and then controls each of the plurality of terminals 402, 403, and 404 registered with the same identification number. send. That is, the switching device 100 describes the <To>, <From>, <Contact>, and <Request-URI> headers and transmits them to the proxy device 200 through the communication module 110, as shown in Table 3. 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 classifies the second to fourth terminals 402, 403, and 404 through the <Request-URI> header, and the proxy device 200 that receives the corresponding SIP message receives the received SIP message. Allows you to identify what should be sent.

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

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

The proxy device 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 may relay a SIP message and a Real Time Protocol (RTP) message transmitted and received between the terminal 400 and the switching device 100.

The storage unit 220 stores the connection information for the terminal 400 connected to the switching device 100 through the storage unit 220.

Table 4 below is for explaining connection information according to an embodiment of the present invention.

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

Referring to Table 4, access information includes an identification number, an IP address, a port, and a connection address.

When the terminal 400 intends to register with the switching device 100, the control unit 230 may relay a message for registration between the switching device 100 and the terminal 400 through the communication unit 210. . In addition, when the switching device 100 intends to provide a call service to the terminal 400, the control unit 230 transmits a message necessary for this to the terminal 400 between the switching device 100 and the terminal 400 through the communication unit 210. You can relay.

When the terminal 400 first accesses the proxy apparatus 200 through a specific IP, the control unit 230 allocates cookie information to the terminal 400 and assigns the cookie information to the terminal 400. In addition, even when the terminal 400 to which the cookie information has been granted accesses again with the same IP, the cookie information provided to the terminal 400 is maintained. However, when the terminal 400 first accesses an IP different from the IP to which the cookie information has been given, the control unit 230 may give the cookie 400 different cookie information.

The terminal 400 may request registration from the switching device 100 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, assuming that the value of the <Contact> header transmitted by the second terminal 402 is “07012345678 @ domain”, the identification number is “07012345678.” In this case, the control unit 230 may display each terminal in the <Contact> header. Include the cookie information given to 400. Referring to <Table 2>, in the case of the second terminal 402, the value of the <Contact> header including "cookie2" will be "07012345678-cookie2 @ domain". Can be. Then, the control unit 230 transmits a register message including the cookie information in the <Contact> header to the switching device 100 through the communication unit 210. As disclosed in Table 4, the third and fourth terminals 403 and 404 are also the same as the case of the second terminal 402.

Meanwhile, the control unit 230 may extract the connection information from the register message and store the connection information in the storage unit 220.

Referring to <Table 4>, the control unit 230 may extract the access address, "07012345678-cookie2 @ domain" from the <Contact> header, extract the identification number, "07012345678", and store the connection information. Is described in a Register message of each terminal 400, and the control unit 230 may extract this port number and store it as connection information.The IP address may describe the IP address of each terminal 400.

By performing the above-described operation, the control unit 230 may distinguish each of the plurality of terminals 400 in the registration request message for the registration request even when the plurality of terminals 400 request the registration with the same identification number. By including the cookie information that can be delivered to the switching device 100, the switching device 100 can manage each of the plurality of terminals (400).

The control unit 230 may receive the SIP message transmitted to the specific terminal 400 from the switching device 100 after storing the access information. The main headers of these SIP messages have been described in <Table 3>. In this case, the control unit 230 refers to the <Request-URI> header of the SIP message, to distinguish the terminal 400 that is the target of the SIP message. Then, the control unit 230 may transmit the SIP message to the separated terminal 400 through the communication unit 210.

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

Terminal To From / Contact Request-URI Second terminal Sip: 07012345678 @ domain Sip: Identification number of originating terminal @ from domain Sip: 07012345678 @ domain Third terminal Sip: 07012345678 @ domain Sip: Identification number of originating terminal @ from domain Sip: 07012345678 @ domain Fourth terminal Sip: 07012345678 @ domain Sip: Identification number of originating terminal @ from domain Sip: 07012345678 @ domain

Referring to Table 5, the <To>, <From>, and <Contact> headers are maintained while the originating terminal transmits to the switching device 100 and the switching device 100 transmits to the proxy device 200. On the other hand, as described in Table 3, the switching device 100 specifies and transmits the target destination terminal of the terminal 400 having the same identification number to the proxy device 200 through the <Request-URI> header. Accordingly, the proxy device 200 may know the target called terminal by referring to the <Request-URI> header of the SIP message transmitted by the switching device 100. Therefore, the proxy apparatus 200 transmits SIP messages to the target recipient terminals, respectively, but does not necessarily describe information for identifying the target recipient terminal in the <Request-URI> header. That is, as shown in Table 5, the proxy apparatus 200 transmits the corresponding 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 the information identifying the second to fourth terminals 402, 403, and 404 in the header.

On the other hand, the plurality of terminals 400 registered with the same identification number may each serve as a calling terminal. Assuming such a case, the following Table 6 shows that 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 message to the switching device 100. In case of transmission, it is for explaining the main header of the SIP message.

Terminal To From Contact Second terminal Sip: ID number of the called terminal Sip: 07012345678 @ domain Sip: 07012345678-Cookie2 @ domain Third terminal Sip: ID number of the called terminal Sip: 07012345678 @ domain Sip: 07012345678-Cookie3 @ domain 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 registered with the same identification number want to talk, and the <From> header indicates the identification number. The identification numbers and domains of terminals 402, 403, and 404 that are registered equally are described. This is the same as the SIP message sent by the terminal 402, 403, 404 registered with the same identification number. However, the proxy apparatus 200 uses the <Contact> header to distinguish between the terminals 402, 403, and 404 having the same 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 may know which terminal 400 among the plurality of terminals 402, 403, and 404 registered with the same identification number through the <Contact> header. have.

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

Referring to FIG. 4, the terminal 400 according to an 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 a connection network and transmitting and receiving data. Here, the data includes various messages according to the SIP. For example, the message according to the 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, a BYE message, and the like.

The communication unit 410 may include at least one of the wireless communication unit 420 and the wired communication unit 430. The wireless communication unit 420 may include a wireless network communication unit 421, a wireless local area network (WLAN), a wireless LAN (Wireless Fidelity or WiMAX), a worldwide interoperability for microwave access (WLAN) communication unit 422, and a wireless fan (WPAN). Network) may include at least one of the communication unit 423.

The wireless communication unit 420 is configured to transmit and receive data according to a wireless communication method, and when the terminal 400 uses wireless communication, the wireless network communication unit 421, the wireless LAN communication unit 422, and the wireless fan communication unit 423. Any one of the data may be transmitted or received.

The wireless network communication unit 421 is a means for transmitting and receiving data by accessing an access network through a base station. When the wireless network communication unit 421 receives data from the control unit 470, the wireless network communication unit 421 may access the access network through a base station and transmit data. In addition, the wireless network communication unit 421 may access the access network through a base station to 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), Wi-Fi (WiFi), or WiMAX (WiMAX). When the WLAN communication unit 422 receives data from the controller 470, the WLAN communication unit 422 may access an access network through an access point and transmit data. In addition, the WLAN communication unit 422 may access the access network through an access point, receive data, and provide the received data to the controller 470.

The wireless fan communication unit 423 is for transmitting and receiving data according to a wireless fan (WPAN) method, and is for transmitting and receiving data through shorter distance wireless communication than the wireless network communication unit 421 and the wireless LAN communication unit 422. . The wireless fan communicator 423 may directly transmit / receive data with another terminal 400. In addition, when the wireless fan communication unit 423 can connect to the gateway directly or through a multi-hop, the wireless fan communication unit 423 may transmit and receive data by accessing the access network through the gateway. The wireless fan communication unit 423 may exemplify communication according to Bluetooth, infrared communication (IrDA), ZigBee, and the like.

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

The input unit 440 is a means for receiving at least one of a user's command, selection, data, and information. The input unit 440 may include a plurality of input keys and function keys for receiving numeric or text information and setting various functions. The input unit 440 detects a user's key input and transmits an input signal according to the detected key input to the controller 470. The input unit 440 may illustrate 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 audio information. The display device 451 may be a touch screen. As such, when the display device 451 is formed in the form of a touch screen, the display device 451 may be part or all of the functions of the input unit 440. Can be performed. In addition, when receiving the session connection request message for the call connection request, the audio device 453 may output a ring tone.

The storage unit 460 is a device for storing data, and includes a main memory device and an auxiliary memory device. The storage unit 460 may store an operating system (OS), an application, 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 requests. Various data stored in the storage unit 460 may be deleted, changed, or added according to a user's manipulation.

The controller 470 may be a process device that actually runs an operating system. For example, the controller 470 may be a central processing unit (CPU). When the power of the terminal 400 is turned on, the controller 470 moves the operating system from the auxiliary storage device of the storage unit 460 to the main memory device, and then boots the operating system.

The controller 470 may generate various messages according to the SIP, and transmit the generated messages through the communication unit 410. In addition, when the controller 470 receives the message according to the SIP, the controller 470 performs a necessary operation according to the type of the message. For example, the controller 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. In addition, the controller 470 may transmit an INVITE message to establish a call connection with the counterpart terminal 400. In addition, when receiving the INVITE message from the other terminal 400, the controller 470 may control to output the ring tone through the audio device 453. This is to inform the user that there is a request for a call connection. It goes without saying that the ring tone can be changed to something else, such as vibration. In addition, when receiving the 180 ringing message from the counterpart terminal 400, the controller 470 may control to output a ring back tone through the audio device 453.

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

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

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 the SIP, the registration request message may be a Register message. The <Contact> header of a Register message contains an identification number and a domain. For example, the <Contact> header may be in the form of "07012345678 @ domain", where "07012345678" is an identification number.

The proxy device 200 serving as a proxy transmits the registration request message to the switching device 100 in step S503, and transmits the cookie information in the <Contact> header of the Register message. For example, assuming that the value of the <Contact> header is "07012345678 @ domain", the value of the <Contact> header including the cookie information "cookie2" may be "07012345678-cookie2 @ domain". That is, as described in Table 2, the proxy device 200 transmits the cookie information to the switching device 100 by including the cookie information in the <Contact> header.

After receiving the registration request message, the switching device 100 checks the registration request message, and then, in operation S505, transmits the authentication request message having the parameter for authentication to the proxy apparatus 200. The authentication request message may be a 401 Unauthorized message according to the SIP. The 401 Unauthorized message stores parameters for authentication in the <WWW-Authenticate> header. The proxy device 200 performs a role of a proxy, thereby transmitting 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 then obtains authentication data according to the operation result. After obtaining the authentication data, the second terminal 402 transmits the registration request message having the authentication data to the proxy apparatus 200 in step S509. According to the SIP, the registration request message transmitted again may use a register message. The registration request message transmitted again uses the same Register message as the registration request message transmitted in step S501, but further includes authentication data. At this time, the authentication data is stored in the <Authorization> header and transmitted. The proxy device 200 transmits a registration message transmitted from the second terminal 402 to the switching device 100 in step S511, and transmits the cookie information in the <Contact> header of the register message. . Accordingly, as described in <Table 2>, the value of the <Contact> header is "07012345678-cookie2 @ domain".

The switching device 100 receiving the registration request message performs authentication by checking the authentication data of the registration request message, and when the authentication is completed, registers the second terminal 402. As described above, necessary information is extracted from the registration request message and stored registration information as shown in Table 1 for the second terminal 402.

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 in step S515. To be sent). According to the 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 may 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 uses the same switching device as that of the second terminal 402 through steps S521 to S533 (step S20) corresponding to steps S501 to S515 described above. 100) can be registered.

Referring to steps S10, S20, and S30 of FIG. 5, the fourth terminal 404 may use steps S541 to S553 (step S30) corresponding to steps S10 (S501 to S515) or S20 (S521 to S533). The second terminal 402 or the third terminal 403 may be registered in the switching device 100 in the same manner.

Meanwhile, in the above-described embodiment of FIG. 5, only three terminals 402, 403, and 404 have been described, but this is an example to show that the plurality of terminals 400 can be registered with the same identification number. It is not. If you want to register another terminal 400 with the same identification number, it is possible to repeat the above-described step S501 to S515 through the other terminal 400. In particular, when it is desired to register with the same identification number, the terminal 400 may set and transmit the same identification number of the <Contact> header of the registration request message. In this case, the proxy apparatus 200 will give different cookie information to different terminals 400. In addition, when the same terminal 400 reconnects to the proxy apparatus 200 through another IP, the proxy apparatus 200 may give different cookie information. Therefore, the switching device 100 may use a terminal identifier unique to the terminal in order to identify the same terminal 400 having different cookie information. Therefore, the switching device 100 may register with respect to the plurality of terminals 400 having the same identification number, and register the plurality of terminals 400 having the same identification number separately through 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.

In FIG. 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. In addition, in FIG. 6, it is assumed that the first terminal 401 is a 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 operation S601, the first terminal 401 transmits a session connection request message to the switching device 100 requesting a call with a specific terminal. The first terminal 401 receives and transmits an identification number of a terminal to which the first terminal 401 wants to talk in a session connection request message. Here, it is assumed that the identification number received by the first terminal 401 is an identification number registered by the second and third terminals 402 and 403 in the same manner. According to the SIP, the session connection request message may be an INVITE message. That is, the first terminal 401 describes and transmits the identification number of the other party requesting the call connection in the INVITE message. 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. Only, the user of the first terminal 401 is to request a call with the other party using the identification number that he knows, but as a result, the first terminal 401 is the second terminal 402 and the third in the INVITE message. The terminal 403 specifies and transmits an identification number registered in the same manner.

Receiving the INVTE message, the switching device 100 receives the INVITE message in step S603 and transmits a processing continuation message to the first terminal 401 indicating that the received INVITE message is being processed. The processing continuation message preferably uses 100 Trying messages according to SIP.

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

The switching device 100 transmits 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 may indicate in the INVITE message that the target of receiving the INVITE message is the second terminal 402. In this case, the switching device 100 preferably uses the <Request-URI> header of the INVITE message to specify that the switching device 100 transmits 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 registration information for the second terminal 402. For example, "07012345678-cookie2 @ domain" may be described in the <Request-URI> header and transmitted. This is the same as the value described in the <Contact> header of the Register message when registering the second terminal 402.

Upon receiving the INVTE message, the proxy device 200 receives the INVITE message in step S607 and transmits a processing continuation (100 Trying) message to the switching device 100 indicating that the received INVITE message is being processed. In operation S609, the proxy apparatus 200 transmits an INVITE message to the second terminal 402. In this case, the proxy apparatus 200 may confirm that the target of the transmission of the INVITE message is the second terminal 402 through the <Request URI> header of the INVITE message received from the switching apparatus 100.

Upon receiving the INVITE message, the second terminal 402 receives the INVITE message in step S611 and transmits a processing continuation (100 Trying) message to the proxy apparatus 200 indicating that the received INVITE message is being processed. The second terminal 402 may output a ring tone to notify the user that there is a call request. As such, the ring tone is a means for notifying that there is a call connection request. Although the ring tone is described as an example as such means, the ring tone is not limited to the ring tone, and other means, such as vibration, may be replaced with the ring tone or used with the ring tone. Of course it can.

In addition to outputting the ring tone, the second terminal 402 responds to the INVITE message by transmitting a 180 Ringing message to the proxy device 200 in step S613. The 180 ringing message is a session connection request confirmation message confirming that a 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, the first terminal 401 outputs a ring back tone. Accordingly, the user of the first terminal 401 may know that the session connection request is delivered to the terminal registered with the identification number requested by the user, that is, the called terminal.

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

The switching device 100 transmits 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 may indicate in the INVITE message that the target terminal to receive the INVITE message is the third terminal 403. At this time, as described in Table 3, the switching device 100 may use the <Request-URI> header of the INVITE message to specify that the transfer to the third terminal (403). Referring to <Table 1>, the value described in the <Request-URI> header is a connection address value among registration information about the third terminal 403. For example, "07012345678-cookie3 @ domain" may be described in the <Request-URI> header and transmitted. This is the same as the value described in the <Contact> header of the Register message when registering the third terminal 403.

Upon receiving the INVITE message, the proxy device 200 receives the INVITE message in step S621, and transmits a processing continuation (100 Trying) message to the switching device 100 indicating that the received INVITE message is being processed. In operation S623, the proxy apparatus 200 transmits an INVITE message to the third terminal 403. In this case, the proxy apparatus 200 may refer to the <Request URI> header of the INVITE message, and may determine that the target terminal for transmitting the INVITE message is the third terminal 403.

Upon receiving the INVITE message, the third terminal 403 receives the INVITE message in operation S625 and transmits a processing continuation (100 Trying) message to the proxy apparatus 200 indicating that the received INVITE message is being processed. After receiving the INVITE message, the third terminal 403 may output a ring tone to notify the user that there is a call request. In operation 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 if the switching device 100 receives the 180 ringing message, the switching device 100 does not transmit the 180 ringing message to the first terminal 401. Since the switching device 100 has previously transmitted the 180 ringing message transmitted from the second terminal 402 to the first terminal 401, the switching device 100 does not transmit the 180 ringing message of the third terminal 403. That is, since it is unnecessary to transmit the 180 ringing message to the calling terminal twice, only one of the plurality of called terminals having the same identification number is delivered to the calling terminal.

Meanwhile, as described above, the switching device 100 and the proxy device 200 transmit an INVITE message received from the first terminal 401 to the second terminal 402 (steps S605 to 609), and Although the process of transmitting to the third terminal 403 (steps S619 to 623) has been described with reference to the reference numerals, it is preferable to simultaneously perform the same. Accordingly, the above-described steps S605 to S615 and S619 to S629 may be performed at the same time.

As described above, a call is made by a user of any one of the second terminal 402 and the third terminal 403 while the second terminal 402 and the third terminal 403 output ring tones. A hook-off operation may occur that accepts the message. Here, it is assumed that a hook off operation is detected in the second terminal 402.

In this case, the second terminal 402 transmits a 200 OK message to the proxy apparatus 200 in step S631. The 200 OK message is a session connection acceptance message for notifying acceptance of the session connection request. The proxy device 200 receiving the 200 OK message 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 acceptance confirmation message indicating that the session connection acceptance is confirmed, in response to the session connection acceptance message. The switching device 100 receiving the ACK message transmits the ACK message to the proxy device 200 in step S639. In this case, as in the case of transmitting the INVITE message (step S605), the second terminal 402 specifies that the target of the ACK message is transmitted using the <Request URI> header of the ACK message. Therefore, the proxy device 200 that has received the ACK message may also confirm that the target of the ACK message is transmitted to the second terminal 402 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. As a result, a session between the first terminal 401 and the second terminal 402 is connected, and the first terminal 401 and the second terminal 402 may communicate with each other through the connected session in step S643.

In operation S645, the switching device 100 transmits a session cancellation request message to the proxy device 200 so that the switching device 100 may be transferred to the third terminal 403 to which the session is not connected. The session cancel request message is for canceling a session connection request, and according to SIP, a CANCEL message may be used. In this case, the switching device 100 also specifies that the third terminal 403 transmits the CANCEL message by using the <Request URI> header of the CANCEL message as in the case of transmitting the INVITE message (step S605). Therefore, the proxy device 200 receiving the CANCEL message may check that the third terminal 403 is a target to transmit the CANCEL message with reference to the <Request URI> header of the CANCEL message. Accordingly, the proxy device 200 transmits a 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 confirming the session cancellation request. The proxy device 200 transmits a 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. Therefore, the third terminal 403 transmits the session connection failure message to the proxy apparatus 200 in step S653. The session connection failure message may use a 487 Request Canceled message according to the SIP. The proxy device 200 transmits a 487 Request Canceled message to the switching device 100 in step S655.

The switching device 100 receiving the 487 Request Canceled message responds to the 487 Request Canceled message on behalf of the first terminal 401 because the first terminal 401 has already established a session connection with the second terminal 402. do. Therefore, 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 confirming the end of the session connection procedure and may use an ACK message according to the SIP. When transmitting the ACK message, the switching device 100 specifies that the target terminal for transmitting the ACK message is the third terminal 403 using the <Request URI> header of the ACK message. Accordingly, the proxy apparatus 200 confirms the transmission target through the <Request URI> header in step S659 and then transmits the ACK message to the third terminal 403. Thus, the session connection procedure is completely terminated without establishing a session connection between the first terminal 401 and the third terminal 403. At this time, the third terminal 403 is in the same state mode, the switching device 100 manages the third terminal 403 in a busy state until the second terminal 402 is terminated.

On the other hand, when the user of the second terminal 402 inputs to terminate the call, the second terminal 402 transmits a session release request message to the proxy apparatus 200 in step S661. The session release request message is for requesting the release of a session connection. The session release request message may use a BYE message according to the SIP. The proxy device 200 transmits a BYE message to the switching device 100 in step S663, and the switching device 100 transmits a BYE message to the first terminal 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 indicating that the session connection release is accepted in operation S667. This session release accept message may use a 200 OK message according to SIP. The switching device 100 transmits a 200 OK message to the proxy device 200 in step S669. When delivering the 200 OK message, the switching device 100 specifies that the target of the 200 OK message is transmitted to the second terminal 402 by using the <Request URI> header of the 200 OK message. Accordingly, the proxy apparatus 200 transmits a 200 OK message to the second terminal 402 in step S671. As a result, 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, by transmitting the INVITE message to all the destination terminal having the same identification number in the same state mode, all the destination terminal outputs the ring tone. This is a means for notifying the user that a call request is being made. In addition, a session between any one terminal in which a hook-off operation in which a user accepts a call connection occurs and a calling terminal is connected at any one terminal of all destination terminals, 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, it is possible to request a call connection to a plurality of terminals used by a specific user, the user using a plurality of terminals currently carry or In response to the call request of the other party, the terminal closest to the terminal may be answered. Accordingly, the terminal not connected to the session is managed in a busy state until the call of the terminal connected to the session is terminated. This has the advantage that a plurality of terminals can be managed consistently from the user's point of view. That is, by registering a plurality of terminals with the same identification number, it is possible to manage a plurality of terminals registered with the same identification number as one call service object. 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 VoIP services of a general desktop computer and a portable terminal with the same identification number, a call service according to VoIP can be provided to a device desired by a user. Accordingly, it is possible to unify and manage various devices supporting VoIP from a user's point of view.

On the other hand, according to another aspect of the invention, the switching device 100 may operate in a state separation mode for managing the terminal 400 registered with the same identification number in different states. Even when any one terminal 400 is in a state separation mode, the other terminal 400 may receive and make a call. In the state separation mode, when the switching device 100 receives an INVITE message requesting a call connection for a plurality of terminals 400 having the same identification number, the switching device 100 determines whether there is a terminal in communication among the plurality of terminals 400. . In this case, when the call is in progress, the switching device 100 manages the session connection for the call of the terminal 400, and thus, may recognize that the arbitrary terminal 400 is in the call. In addition, since the terminal 400 registered with the same identification number can be distinguished through the cookie information and the terminal identifier, it is possible to separately manage the state of the terminal in the call. As such, the switching device 100 may recognize each state of the terminal 400 registered with the same identification number. Accordingly, in the state separation mode, the switching device 100 does not transmit the INVITE message to the busy terminal among the plurality of terminals 400 registered with the same identification number.

For example, it is assumed that three terminals 400 having the same identification number are present in the second to fourth terminals 402, 403, and 404, and the fourth terminal 404 is in a call. In addition, it is 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 an INVITE message only to two second and third terminals 402 and 403 that are not in a call. The rest of the procedure is the same as the procedure performed in the same state mode described with reference to FIG. 6.

As such, in the state separation mode, the switching device 100 may manage each of the terminals 400 registered with the same identification number in different states. Therefore, the switching device 100 may provide a call service so that even when any one of the called terminals having the same identification number is in a call, a call can be made by connecting a session with the calling terminal to at least one of the other called terminals. 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 member of the family has a portable terminal supporting VoIP. When the portable terminal of one of the desktop computer and the family member is registered with the same identification number, the devices can be divided and used by a plurality of users as needed to efficiently use the device. This may be a suitable method when a plurality of call terminals are to be used in parallel to perform a plurality of calls. In particular, 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 of 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 operation 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 may be made through an INVITE message.

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

As a result of checking in step S703, if there is only one called terminal registered with the same identification number, the switching device 100 proceeds to step S705 to provide a call connection service according to the 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 is in the same state mode of providing the same communication service to a plurality of destination terminals registered with the same identification number in step S707. Alternatively, the plurality of called terminals registered with the same identification number may be classified into cookie information and a terminal identifier to determine whether the service is in a state separation mode for providing a communication service.

As a result of the determination in step S707, in the same state mode, the switching device 100 transmits the session connection request message to all the called terminals registered with the same identification number in step S709. For example, if there are three destination terminals registered with the same identification number, a session connection request message is transmitted for each. 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 destination terminal. In the transmission of the SIP message, it is as described above with reference to Table 3 to distinguish the plurality of terminals 400 registered with the same identification number using the <Request URI> header.

On the other hand, when the determination result of step S707, in the state separation mode, the switching device 100 transmits the session connection request message to all the destination terminals that are not in a busy state among the plurality of destination terminals registered with the same identification number in step S711. For example, assuming that there are three destination terminals registered with the same identification number, and any one of the destination terminals is busy, the session connection request message may be delivered to each of the remaining two destination terminals.

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

As the session connection request message is transmitted, the switching device 100 may receive a session connection request confirmation message from each destination terminal that receives the session connection request message. The session connection request confirmation message may use a 180 ringing message according to SIP. Therefore, when the switching device 100 receives at least one 180 ringing message in step S713, the switching device 100 transmits any one of the 180 ringing messages received in step S715 to the calling terminal. Since it is not necessary to transmit more than two 180 ringing messages to the calling terminal, it is preferable to transmit only one when receiving 180 ringing messages from a plurality of called terminals. On the other hand, if the switching device 100 does not receive at least one session connection request confirmation message in step S713, it notifies the calling terminal that the session connection has failed in step S729, and terminates the session connection procedure.

In addition, as the session connection request message is transmitted, the switching device 100 may receive a session connection request acceptance message from each destination terminal that receives the session connection request message. The session connection request accept message may use a 200 OK message according to SIP. Accordingly, when the switching device 100 receives the 200 OK message from any one 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 a 200 OK message in step S717, it notifies the calling terminal that the session connection has failed in step S729, and terminates the session connection procedure.

In operation S719, the switching device 100 receiving the session connection request accept message 200 establishes a session connection between the calling terminal and the called terminal transmitting the 200 OK message. This corresponds to the steps S631 to S643 described above.

Then, the switching device 100 terminates the session connection procedure of all the destination terminals not transmitting the session connection request accept message in step S721. This is the same as the steps S645 to S659 described above.

On the other hand, the switching device 100 checks in step S723 whether the call is terminated between the calling terminal and the called terminal to which the session is connected. If the call is not terminated as a result of the check, the switching device 100 waits until the call ends in step S725. On the other hand, when the call is terminated as a result of the check, the switching device 100 releases the session connection between the calling terminal and the called terminal connected to the session with the calling 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, by providing the same call service to the plurality of terminals through the same identification number, so that the user can manage the plurality of terminals in the same manner. In addition, by switching to the state separation mode as needed, by providing the call service to the plurality of terminals through the cookie information and the terminal identifier, the user can efficiently use the device.

For example, in the case of an enterprise subscriber, one user may use a portable FMC terminal, a fixed wired IP phone installed in a company, a Unified Communication (UC) PC soft phone, and the like, and register the plurality of terminals with one identification number. In the case of using the user, even when the user is in the office or on the road, a single identification number can be used to make contact or perform necessary tasks. Therefore, the user can manage the plurality of terminals with one identification number, and can provide convenience to the work. In addition, by using a fixed terminal provided in a company by a plurality of users as needed, use of a terminal can be made efficient.

Method for providing a call service to a plurality of terminals having the same identification number of the switching device according to an embodiment of the present invention, may be implemented in the form of a program readable through various computer means can be recorded on a computer-readable recording medium have. Here, the recording medium may include a program command, a data file, a data structure, etc. alone or in combination. Program instructions recorded on the recording medium may be those specially designed and constructed for the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. For example, the recording medium may be magnetic media such as hard disks, floppy disks and magnetic tapes, optical media such as CD-ROMs, DVDs, or magnetic-optical media such as floptical disks. magneto-optical media, and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of program instructions may include high-level language code that can be executed by a computer using an interpreter as well as machine code such as produced by a compiler. Such hardware devices may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

In the present specification and drawings, preferred embodiments of the present invention have been disclosed, but it is possible to practice other modifications based on the technical spirit of the present invention, even with the exception of the embodiments disclosed herein. It is obvious to those who have. In addition, although specific terms are used in the specification and the drawings, they are only used in a general sense to easily explain the technical contents of the present invention and to help the understanding of the present invention, and are not intended to limit the scope of the present 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 for the same, and a method therefor, wherein a plurality of terminals are registered with the same identification number by registering the plurality of terminals with the same identification number. The terminal may 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 types of VoIP may be unified and managed. For example, by providing VoIP services of a general desktop computer and a portable terminal with the same identification number, a call service according to VoIP can be provided to a device desired by a user. Accordingly, it is possible to unify and manage various devices supporting VoIP from a user's point of view. In addition, the terminal managed by the same identification number can be managed separately 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 member of the family has a portable terminal supporting VoIP. When the portable terminal of one of the desktop computer and the family member is registered with the same identification number, the devices can be divided and used by a plurality of users as needed to efficiently use the device. In addition, in the case of a company subscriber, one user can use a portable FMC terminal, a fixed wired IP phone installed in the company, a Unified Communication (UC) PC soft phone, and the like, and register the plurality of terminals with one identification number. In the case of using the user, even when the user is in the office or on the road, a single identification number can be used to make contact or perform necessary tasks. Therefore, the user can manage the plurality of terminals with one identification number, and can provide convenience to the work. In addition, the use of the terminal can be efficiently performed by allowing a plurality of users to use the fixed terminal provided in the company as needed. This is not only commercially available or commercially viable, but also practically and repetitively, so there is industrial applicability.

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)

A plurality of terminals registered in the switching device with the same identification number, cookie information assigned to each, and respective unique terminal identifiers;
A proxy device for assigning the cookie information to distinguish each of the plurality of terminals; And
The switching device provides the same call service to the plurality of terminals through the same identification number, or provide a call service by distinguishing the plurality of terminals through at least one of the cookie information and the terminal identifier. Communication system for providing a call service to a plurality of terminals having the same identification number, characterized in that. Communication module for transmitting and receiving data;
A registration module for registering a plurality of terminals with the same identification number and separately registering each of the plurality of terminals by cookie information given 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 service to the plurality of terminals through the same identification number, or provides a call service by distinguishing the plurality of terminals through at least one of the cookie information and the terminal identifier. Switching device for providing a call service to a plurality of terminals having the same identification number, characterized in that. The method of claim 2, wherein the control module
In case of providing the same call service,
When receiving a session connection request message for requesting a session connection for a terminal registered with the identification number from a specific terminal, a session connection request message specified for each of the plurality of terminals is delivered to a proxy device, and each terminal designated as a target is received. Switching device for providing a call service to a plurality of terminals having the same identification number, characterized in that to be transmitted to. The method of claim 2, wherein the control module
When providing a call service by dividing the plurality of terminals,
When receiving a session connection request message for requesting a call for a terminal registered with the identification number from a specific terminal, a session connection request message for each of the terminals except for the call terminal among the plurality of terminals is delivered to the proxy device. Switching device for providing a call service to a plurality of terminals having the same identification number, characterized in that to be transmitted to each of the terminal specified as the target. The method of claim 3 or 4, wherein the control module
When receiving the session connection request acceptance message for accepting the session connection through the proxy device, the same identification characterized in that to provide a session connection between any one terminal that has received the received session connection request acceptance message and the specific terminal. Switching device for providing a call service to a plurality of terminals having a number. The method of claim 3 or 4, wherein the control module
When the session connection request acceptance message for accepting the session connection is received through the proxy device, the session connection procedure of the other terminals except for any one terminal that has transmitted the received session connection request acceptance message is terminated. Switching device for providing a call service to a plurality of terminals having the same identification number. The method of claim 2, wherein the registration module
When the registration request message of each of the plurality of terminals is received, the identification number, the cookie information, and the terminal identifier are extracted from the received registration request message, and each of the plurality of terminals has the same identification number. Switching device for providing a call service to a plurality of terminals. The method of claim 2, wherein the switching device
And a storage module for storing the same identification number of each of the plurality of terminals, cookie information of each of the plurality of terminals, and registration information to which terminal identifiers of each of the plurality of terminals are mapped. Switching device for providing a call service to a plurality of terminals. The method of claim 2, 7, or 8, wherein the cookie information is
And a proxy device for relaying a message between the switching device and the plurality of terminals, the proxy device providing a call service to a plurality of terminals having the same identification number. A communication unit for communicating with the switching device and the plurality of terminals; And
When receiving a registration request message requesting registration with the same identification number from the plurality of terminals, the cookie information is assigned to distinguish each of the plurality of terminals, and a registration request message including the assigned cookie information is transmitted through the communication unit. Proxy unit for providing a call service to a plurality of terminals having the same identification number, characterized in that it comprises a control unit for transmitting to the switching device. The method of claim 10,
The registration request message is a register message according to SIP.
The control unit
Proxy device for providing a call service to a plurality of terminals having the same identification number comprising the cookie information in the <Contact> header of the Register message, and transmits the cookie information. The method of claim 10, wherein the control unit
Receiving a message transmitted to any one terminal of the plurality of terminals from the switching device, the object is classified by referring to the cookie information, and the message is transmitted to the classified object through the communication unit. Proxy device for providing a call service to a plurality of terminals having the same identification number. The method of claim 10, wherein the proxy device
And a storage unit which maps and stores the identification number and the cookie information for each of the plurality of terminals, wherein the proxy apparatus provides a call service to a plurality of terminals having the same identification number. Receiving a session connection request message for requesting a session connection to a called terminal having a specific identification number from a calling terminal, checking whether there are a plurality of called terminals having the identification number;
If the check result is a plurality of destination terminals registered with the identification number, whether the same state mode to provide the same call service for the plurality of destination terminals or the state separation mode to provide a call service by separating the plurality of destination terminals; Determining whether or not;
If the determination result, in the same state mode, transmitting a session connection request message for each of the plurality of destination terminals to the proxy device to be transmitted to each destination terminal specified as the target; And
When the session connection request acceptance message for accepting the session connection is received through the proxy device, establishing a session connection between any one of the called terminal and the originating terminal that has received the received session connection request acceptance message; Method for providing a call service to a plurality of terminals having the same identification number of the switching device, characterized in that. The method of claim 14, wherein after the determining,
As a result of the determination, in the state separation mode, a session connection request message, which is specified for each of the destination terminals other than the called terminal among the plurality of destination terminals, is transmitted to the proxy apparatus, so that each of the destination terminals specified as targets is transmitted. step; And
Receiving a session connection request acceptance message for accepting the session connection, establishing a session connection between any one of the called terminal and the originating terminal that has received the received session connection request acceptance message; Method for providing a call service to a plurality of terminals having the same identification number of the switching device. The method of claim 14 or 15, wherein the transmitting step
The same identification number of the switching device, characterized in that the plurality of destination terminals are distinguished using at least one of cookie information and the terminal identifier, and the session connection request message is transmitted by specifying each of the distinguished destination terminals. Method for providing a call service to a plurality of terminals having a. The method according to claim 14 or 15,
The session connection request message is an INVITE message according to SIP.
The transmitting may include specifying the target terminals in the <Request URI> header of the INVITE message so that the INVITE message is delivered to each of the specified destination terminals. Method for providing a call service to a plurality of terminals. The method of claim 14 or 15, wherein after the setting step,
Terminating the session connection procedure of the called terminal except for any one of the called terminal which has transmitted the session connection request accept message; providing a call service to a plurality of terminals having the same identification number of the switching device. How to Provide. The method of claim 14 or 15, after the transmitting step, before the setting step,
And when the session connection request confirmation message confirming the session connection request is received from at least one called terminal, transmitting any one of the received session connection request confirmation messages to the calling terminal. Method for providing a call service to a plurality of terminals having the same identification number of the device.

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