KR20100034225A - Method for security service based on internet protocol multimedia subsystem and system for the same - Google Patents

Abstract

PURPOSE: An internet protocol multimedia subsystem base secure service method and system applies the efficient net by disuniting the processing task of the media stream and call processing task. CONSTITUTION: A service system for security(100) comprises the control terminal(10), and the IMS(30) and controlled terminal(20). The control terminal is composed of the mobile communications device like the cellular phone. The controlled terminal comprises the movie module like camera. The controlled terminal comprises the mobile communications module which is connectable like the control terminal in the mobile radio communications network. IMS comprises the call session control device(110), and the home subscriber server and image media control server.

Description

Method for security service based on internet protocol multimedia subsystem and system for the same}

The present invention relates to a security service, and more particularly, to a method and system for security service based on the Internet protocol multimedia subsystem.

With the development of mobile communication, the spread of various high quality multimedia services using mobile terminals is increasing. Recently, technologies for internet multimedia services based on IP-based core networks have been developed. As an example, the 3rd Generation Partnership Project (3GPP) is working on standardizing ALL IP based core networks to provide IP based multimedia services.

In the ALL IP-based core network proposed in 3GPP, basic and major processes for call processing are performed by IMS. In IMS, call processing and media stream processing are separated, enabling efficient network operation. Various services based on such IMS are required.

An object of the present invention is to provide an IMS-based security service.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, in accordance with an embodiment of the present invention, an internet protocol multimedia subsystem-based security service method includes: establishing an internet protocol multimedia subsystem session with a controlled terminal; Receiving an event generation message based on an internet protocol subsystem informing an event occurrence from a control terminal, and sending an event notification message informing the control terminal of the event occurrence of the controlled terminal.

In order to achieve the above object, a security service system based on an internet protocol multimedia subsystem according to an embodiment of the present invention includes a call session control device and an internet protocol multimedia subsystem session for establishing an internet protocol multimedia subsystem session of a controlled terminal. And receiving an event generation message based on an internet protocol subsystem informing the occurrence of an event from the formed controlled terminal, and transmitting an event notification message informing the controller terminal of the event occurrence.

Specific details of other embodiments are included in the detailed description and the drawings.

According to the IMS-based security service method and a system therefor according to the present invention as described above has an effect that can provide an efficient security service based on the IMS.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a security service system 100 according to an embodiment of the present invention. The security service system 100 may include a control terminal 10, an Internet Protocol Multimedia Subsystem (IMS) 30, and a controlled terminal 20.

The control terminal 10 is a mobile communication device such as a mobile phone. Of course, the embodiment of the control terminal 10 is not limited to a mobile phone. If the control terminal 10 includes a mobile communication module that can access a mobile communication network based on code division multiple access (CDMA), wideband code division multiple access (WCDMA), global system for mobile communication (GSM), or the like, the control terminal 10 It can also be implemented with other types of digital devices, such as personal digital assistants (PDAs) or notebooks.

The controlled terminal 20 is a digital device including a photographing module such as a camera and a mobile communication module capable of connecting to a mobile communication network like the control terminal 10. Therefore, not only the control terminal 10 but also the controlled terminal 20 may be assigned a mobile phone number necessary for accessing a mobile communication network such as an international mobile station identity (IMSI).

Although FIG. 1 shows that the control terminal 10 and the controlled terminal 20 communicate with the IMS 30 directly, the present invention is not limited thereto, and the control terminal 10 and the controlled terminal 20 Communication with the IMS 30 may be performed through a mobile communication network. In addition, although the control terminal 10 and the controlled terminal 20 are illustrated one by one in FIG. 1, each of them may exist in plurality.

The IMS 30 includes a Call Session Control Function (CSCF) 110, a Home Subscriber Server (HSS) 120, and a Video Media Control Enabler (VME) 130. can do. The IMS 30 may comply with the 3rd Generation Partnership Project (3GPP) standard, but the present invention is not limited to the 3GPP standard.

The CSCF 110 may perform basic functions for session initiation protocol (SIP) based multimedia connection control, such as subscriber registration, authentication, service triggering, routing, various call control, and address handling. . The CSCF 110 includes a proxy CSCF (P-CSCF 111), an interrogating-CSCF (I-CSCF 112), and a serving CSCF (S-CSCF 113). )) May be included.

The P-CSCF 111 is the first point at which the control terminal 10 and the controlled terminal 20 connect to the IMS 30 (in the following description, the “terminal” is the control terminal 10 and the controlled terminal 20). ) Collectively). When a registration request message (REGISTER) is transmitted from the terminal, the P-CSCF 111 may transmit it to the I-CSCF 112. The P-CSCF 111 stores the address of the S-CSCF 113 allocated by the I-CSCF 112 in the process of processing the registration request message, and then receives an Sv request message (INVITE) from the terminal. Forward to CSCF 113.

The I-CSCF 112 may serve as a contact point for an incoming call to connect to a terminal of a subscriber in a network and a contact point with a terminal of another network subscriber roaming in the network. In the process of registering the location of the terminal, the I-CSCF 112 obtains the addresses of the S-CSCFs available from the HSS 120, and may determine the S-CSCF to be responsible for the actual location registration with reference to this.

The S-CSCF 113 registers the location of the terminal with the HSS 120 when receiving a registration request message requesting the location registration from the I-CSCF 112, and obtains the subscriber profile of the terminal user from the HSS 120. Can be. The S-CSCF 113 may identify the type of service to be provided to the control terminal 10 using the subscriber profile and perform triggering on a server that will support the identified service. In addition, the S-CSCF 113 may obtain an authentication vector from the HSS 120 and perform subscriber authentication using the authentication vector.

The HSS 120 is a master database of subscribers, and stores and manages subscriber profile, authentication, and location related data, and provides information required by the I-CSCF 112 or the S-CSCF 113.

The VME 130 may relay various data or messages transmitted between the control terminal 10 and the controlled terminal 20, such as video data, audio data, control messages, and response messages to the control messages. In addition, the VME 130 may store a list of controlled terminals that are allowed to establish a session connection with the control terminal 10. Such a list may be previously registered in the VME 130 by a service provider providing a security service according to a user's request of the control terminal 10. In addition, the VME 130 may store image data transmitted from the controlled terminal 20, and may transmit the stored image data to the control terminal 10 when the control terminal 10 requests it. In addition, the VME 130 may store data necessary to provide a security service according to an embodiment of the present invention. Other functions of the VME 130 will be described through the following embodiments.

1 shows that IMS 30 includes P-CSCF 111, I-CSCF 112, S-CSCF 113, HSS 120, and VME 130 one by one, but this is the IMS. Since it is for demonstrating the basic structure of 30, this invention is not limited to this. Accordingly, the IMS 30 may include a plurality of devices or servers shown in FIG. 1. Also, although not shown in FIG. 1, another device or server, such as a multimedia resource function (MRF) that handles call mixing and media mixing, may be further included in the IMS 30.

In addition, although FIG. 1 shows that the control terminal 10 and the controlled terminal 20 are connected to the IMS 30 through the same CSCF 110, the present invention is not limited thereto, and the control terminal 10 and the control terminal 10 are not limited thereto. The controlled terminal 20 may access the IMS 30 through different CSCFs.

Location registration for a terminal may be performed to receive a security service according to an embodiment of the present invention. The location registration operation may be performed when a user's request or a preset event occurs while power is supplied to the terminal, or may be automatically performed when power is applied to the terminal. An embodiment of a location registration operation of the control terminal 10 is shown in FIG.

The control terminal 10 may transmit a registration request message to the P-CSCF 111 (S210). The registration request message may include a Uniform Resource Identifier (hereinafter referred to as a destination URI) indicating a destination domain, a URI of the control terminal 10, an IP address of the control terminal 10, and the like.

Upon receiving the registration request message from the control terminal 10, the P-CSCF 111 may perform a domain name system (DNS) query operation (S215). Through the DNS query operation, the P-CSCF 111 may obtain the address of the I-CSCF 112. More specifically, in the DNS query operation, the P-CSCF 111 may transmit a DNS query message (DNS query message) including a destination URI of the registration request message received from the control terminal 10 to a DNS (not shown). have. At this time, DNS selects an appropriate I-CSCF 112 by referring to a destination URI included in the DNS query message, and a DNS query response message including an address of the selected I-CSCF 112. May be transmitted to the P-CSCF 111.

The P-CSCF 111 having obtained the address of the I-CSCF 112 may transmit a registration request message of the control terminal 10 to the I-CSCF 112 (S220).

Upon receiving the registration request message from the P-CSCF 111, the I-CSCF 112 transmits a user authorization request (UAR) message to the HSS 120 (S225). Although omitted in FIG. 2, before the process S225, the operation of obtaining the address of the HSS 120 by the I-CSCF 112 may be performed. Here, the I-CSCF 112 may obtain the address of the HSS 120 from an SLF (Server Locator Function, not shown).

The HSS 120 selects the S-CSCF 113 suitable for the control terminal 10 by referring to the UAR message transmitted from the I-CSCF 112 and includes information on the selected S-CSCF 113. A user authorization response message (UAA) message may be transmitted to the I-CSCF (S230) (S230).

The I-CSCF 114 may set the S-CSCF 113 to process the registration request of the control terminal 10 through the UAR message, and may transmit a registration request message to the set S-CSCF 113 (S235). ). If the HSS 120 transmits information on the plurality of S-CSCFs in step S230, the I-CSCF 112 may select one of the plurality of S-CSCFs to be in charge of message processing of the control terminal 10.

Thereafter, the S-CSCF 113 may transmit a Server Assignment Request (SAR) message to the HSS 120 (S240). The server assignment request message may include a routing path, an IP address, and the like of the control terminal 10. For example, the server assignment request message may include the address of the P-CSCF 111 to which the control terminal 10 is connected and the address of the S-CSCF 113.

Although omitted in FIG. 2, before the process S240 is performed, the S-CSCF 113 obtains an authentication value from the HSS 120 and the control terminal 10, determines whether they are the same, and determines the control terminal 10. The authentication process can be performed. For example, the S-CSCF 113 performs process S240 when two authentication values acquired from the HSS 120 and the control terminal 10 are the same, and if the two authentication values are not the same, the P-CSCF 111. After transmitting the message indicating the location registration failure to the control terminal 10 through the) may be finished the location registration operation.

Upon receiving the SAR message from the S-CSCF 113, the HSS 120 may store information (eg, a routing path of the terminal 10, an IP address, etc.) included in the server assignment request message. Preferably, the HSS 120 may include the routing path and the IP address of the control terminal 10 in the initial filter criterion (iFC) of the subscriber profile. The subscriber profile can be used when triggering the appropriate service to be provided to the control terminal 10.

Thereafter, the HSS 120 may transmit a Server Assignment Answer (SAA) message to the S-CSCF 113 as a response to the server assignment request message (S245). The server assignment response message may include a subscriber profile. The subscriber profile may include various pieces of information necessary to provide a service to the control terminal 10. According to an embodiment of the present invention, the subscriber profile may include information on whether the control terminal 10 has subscribed to a security service, a routing path leading to the control terminal 10, an IP address of the control terminal 10, and the like. Can be. Preferably, such information may be included in the iFC in the subscriber profile.

Upon receiving the server assignment response message, the S-CSCF 113 may store the subscriber profile and transmit a response message (for example, a 200 OK message) to the I-CSCF 112 (S250). Upon receiving the response message, the I-CSCF 112 may transmit it to the P-CSCF 111 (S255), and the P-CSCF 111 may transmit it to the control terminal 10 (S260).

In addition, the S-CSCF 113 may check the service subscribed to the control terminal 10 through the subscriber profile. If the control terminal 10 subscribes to the security service according to an embodiment of the present invention, a 3rd party registration operation for registering the control terminal 10 to the VME 130 may be performed (S265). For example, the S-CSCF 113 may transmit a registration request message to the VME 130 requesting to register the control terminal 10 with the VME 130, and the VME 130 sends the control terminal 10 to the VME 130. Register and send a response message to the S-CSCF 113 in response to the registration request message. The registration request message transmitted from the S-CSCF 113 to the VME 130 may include a routing path, an IP address, and the like of the control terminal 10.

When the location registration process as shown in FIG. 2 is completed, the P-CSCF 111 may know the address of the S-CSCF 113 to process the request of the control terminal 10, and the S-CSCF 113 May hold the service profile of the control terminal 10 and the routing path of the control terminal 10 (eg, the address of the P-CSCF 111). In addition, the VME 130 having registered the control terminal 10 may also have a routing path (for example, addresses of the S-CSCF 113 and the P-CSCF 111) of the control terminal 10, When the control terminal 10 requests, it can provide an appropriate service.

The location registration process of the control terminal 10 illustrated in FIG. 2 may be similarly applied to the controlled terminal 20. Therefore, a detailed description of the location registration process of the controlled terminal 20 will be omitted.

When the location registration work is completed, the control terminal 10 may control the controlled terminal 20 through the IMS 30 or may acquire image data photographed by the controlled terminal 20. This will be described in more detail with reference to the following examples.

3 is a flowchart illustrating a process of acquiring a list of controlled terminals by the control terminal 10 according to an embodiment of the present invention. In the present embodiment, the P-CSCF 111 and the S-CSCF 113 are expressed by integrating them into the CSCF 110. However, this is merely for convenience of description and in a specific embodiment, the control terminal 10 and the VME ( The message transmitted between 130 may be via the P-CSCF 111 and the S-CSCF 113. This may be similarly applied to other embodiments below. 3, the process of obtaining the list of controlled terminals by the control terminal 10 may be automatically performed following the location registration task of FIG. 2, or may be performed at the request of a user.

The control terminal 10 intending to use the security service may transmit a controlled terminal list request message for requesting a list of controlled terminals allowed access (S310). The controlled terminal list request message may be implemented using the SUBSCRIBE message of the SIP.

The CSCF 110 may transmit a controlled terminal list request message to the VME 130 (S320).

As mentioned above, in the security system 100 illustrated in FIG. 1, a plurality of controlled terminals may exist, and a user may register a controlled terminal to be connected to the VME 130 using the control terminal 10. You can put it. Accordingly, the VME 130 may store and manage information about the control terminal 10 and the controlled terminal corresponding thereto. As an example of information about a controlled terminal, the address indicating the controlled terminal's address (for example, a mobile communication number), an access indicating whether establishing a media connection with the controlled terminal is permitted only to a specific controlling terminal or to the general public. The permission information, the control permission information indicating whether the control terminal 10 can control the operation of the controlled terminal, and the name indicating each controlled terminal when the control terminal 10 displays the list of the controlled terminals. A display name to be used, and the like. Such controlled terminal information may be set by the user in advance.

Upon receiving the controlled terminal request message, the VME 130 may transmit a response message (for example, a 200 OK message) to the CSCF 110 (S330), and the CSCF 110 may transmit it to the control terminal 10. There is (S340). In this case, the VME 130 may prepare to transmit a list of controlled terminals to be provided to the control terminal 10.

When the controlled terminal list is ready for transmission, the VME 130 may transmit a controlled terminal list notification message to the CSCF 110 (S350). The controlled terminal list notification message may include a controlled terminal list. The controlled terminal list notification message may be implemented using a SUBSCRIBE message of SIP, an example of which is illustrated in FIG. 4.

The controlled terminal list notification message 400 illustrated in FIG. 4 includes the controlled terminal list 410 in the form of an XML document. The illustrated controlled terminal list 410 includes two controlled terminal information 420 and 430, and each controlled terminal information 420 and 430 includes an address of the controlled terminal 421 and 431, and access allowed. Information 422 and 432, control permission information 423 and 433, and display names 424 and 434 are included. Since the access permission information 422 and 432 are set to "private" in both controlled terminals, access using other control terminals will be blocked. If the access permission information is set to "public", other control terminals other than the control terminal 10 may obtain image data photographed by each controlled terminal. On the other hand, the control permission information 423 is set to "no", which indicates that the controlled terminal corresponding to the controlled terminal information 420 cannot be controlled using the control terminal 10. In addition, the control permission information 433 is set to 'yes', which indicates that the control terminal 10 can control the controlled terminal corresponding to the controlled terminal information 430.

According to an embodiment of the present invention, the controlled terminal list 410 may include information on all the controlled terminals registered in the VME 130 in advance so that the user can access through the control terminal 10. Also, among the controlled terminals registered by the user, the location registration operation as described in FIG. 2 may be performed to include only information on the controlled terminal in which a session is currently established with the IMS 30. Of course, if the controlled terminal list 410 includes information on all controlled terminals registered in advance, the information on each controlled terminal is terminated whether a session is formed between the controlled terminal and the IMS 30. Information indicating whether or not there may be further included.

Referring to FIG. 3 again, the CSCF 110 that has received the controlled terminal list notification message from the VME 130 may transmit it to the control terminal 10 (S360).

Upon receiving the controlled terminal list notification message, the control terminal 10 may transmit a response message (for example, 200 OK message) to the CSCF 110 (S370), and the CSCF 110 may transmit it to the VME 130. Can be (S380).

The control terminal 10 may extract the controlled terminal list from the received controlled terminal list notification message, and display the controlled terminal list in a graphic user interface and display the same to the user. The user selects a controlled terminal to be accessed through the list of controlled terminals displayed by the control terminal 10 and forms a media connection with the selected controlled terminal using the control terminal 10, By taking a picture, image data stored in the VME 130 may be acquired.

5 is a flowchart illustrating a process of forming a media connection between the control terminal 10 and the controlled terminal 20 according to an embodiment of the present invention. In the present embodiment, the CSCF 110-1 and the CSCF 110-2 may be the same device or different devices.

When the user selects the controlled terminal 20 from the list of controlled terminals and requests to form a media connection with the selected controlled terminal 20, the control terminal 10 sends a session request message to the CSCF 110-1. It may transmit (S510). The session request message may be implemented using a SIP-based INVITE message. The session request message may include the address of the controlled terminal 20 as a destination address, and may further include a connection header indicating that the session request message should be routed to the VME 130. For example, the access header may include the address of the VME 130.

When the session request message is received from the control terminal 10, the CSCF 110-1 may transmit a response message (for example, 100 Trying message) to the control terminal 10 indicating that the call is being processed (S515). In operation S520, the session request message may be transmitted to the 130. According to an embodiment of the present invention, the CSCF 110-1 may know that the session request message should be routed to the VME 130 through the connection header of the session request message received from the control terminal 10. That is, through this, the CSCF 110-1 may distinguish a media connection establishment task for the security service provided by the VME 130 from a session establishment task for another service based on the IMS 30.

The VME 130 may transmit a response message (for example, 100 Trying message) to the CSCF 110-1 (S525).

Thereafter, the VME 130 checks the address of the controlled device 20 included in the session request message, and transmits the session request message to the CSCF 110-2 to which the controlled device 20 is connected (S530). ). The routing path of the controlled device 20 known to the VME 130 may be obtained when the location of the controlled device 20 is registered.

Upon receiving the session request message, the CSCF 110-2 may return a response message (for example, 100 Trying message) (S535), and transmit the session request message to the controlled terminal 20 (S540).

The controlled terminal 20 transmits a response message (for example, 100 Trying message) to the CSCF 110-2 (S545), and when it is ready to form a media connection, the session response message (for example, 200 OK message). ) May be transmitted to the CSCF 110-2 (S550).

Thereafter, the session response message may be transmitted to the control terminal 10 via the VME 130 and the CSCF 110-1 (S555 to S565).

Thereafter, the VME 130 may form a media connection with the control terminal 10 and the controlled terminal 20 (S570 and S575). According to an embodiment of the present invention, the media connection may be formed and maintained based on a Real-time Transprot Protocol (RTP). When the media connection is established, the image data generated by the controlled terminal 20 by performing the photographing operation may be transferred to the control terminal 10 via the VME 130. The control terminal 10 may display image data transmitted from the VME 130 to the user.

As described above, since there may be a plurality of controlled terminals, the user installs the controlled terminals 20-1 and 20-2 at various positions as shown in FIG. 6, and the control terminal 10. By using the IMS (30) can check the image data captured by the desired controlled terminal.

In the meantime, when the media connection is to be terminated, the control terminal 10 may transmit a session termination request message (eg, a BYE message) to the VME 130. Of course, the session termination request message transmitted by the control terminal 10 may be delivered to the VME 130 via the CSCF 110, and from the VME 130 to the controlled terminal 20 via the CSCF 110. Can be delivered. In addition, when an obstacle occurs in maintaining the media connection (for example, when the VME 130 detects an error of the control terminal 10 or the controlled terminal 20, an error occurs in the VME 130). (Eg, when the power of the controlled terminal 20 is cut off), the VME 130 or the controlled terminal 20 may transmit a session end request message by itself.

According to an embodiment of the present disclosure, the user may set in advance such that an image captured by the controlled terminal 20 is transmitted to the VME 130 when a specific event occurs. For example, a user may install a sensor capable of detecting an abnormal condition occurring on the photographing area of the controlled terminal 20, such as an infrared sensor or a thermal sensor, and an event may be detected when the installed sensor detects an abnormal condition. It can be set to occur. Alternatively, the event may be set when the controlled terminal 20 analyzes the captured image data and determines that there is a movement of an object in the photographing area.

In another embodiment, a virtual line is virtually set in an image frame so as to partition a specific area of an image frame including image data captured by the controlled terminal 20, and analyzes the image data to be captured as a virtual line. When an object enters or exits a partitioned area, an event may be set. For example, as illustrated in FIGS. 7A and 7B, virtual lines 712 and 722 for dividing certain regions 711 and 721 of the image frames 710 and 720 into a protection region are set, and the protection regions 711 and If there is an object moving through the virtual lines 712 and 722 in or out of the protection region 711 and 721, the controlled terminal 20 may determine that an event has occurred. Whether or not there is movement of an object is determined by comparing two image frames taken in succession to find an area where a difference occurs between the image frames, and repeating this operation for each image frame to determine whether the area having a difference passes through the virtual line. This can be seen. Of course, since this is exemplary, other embodiments of determining the movement of the object in the image frame are possible.

Although the above-described image analysis module for analyzing the sensor or the image frame may be included in the controlled terminal 20, the image analysis module exists as a device independent of the controlled terminal 20 and may provide necessary information to the controlled terminal 20. It may be.

8 is a flowchart illustrating a security service providing process according to an embodiment of the present invention. Although two CSCFs 110-1 and 110-2 are illustrated in FIG. 8, they may be the same device or different devices.

When a preset event occurs, the controlled terminal 20 may transmit an event generation message indicating the occurrence of the event to the CSCF 110-2 (S810), and the CSCF 110-2 may transmit it to the VME 130. It may be transmitted to (S820).

An example of an event occurrence message transmitted by the controlled terminal 20 is illustrated in FIG. 9. The illustrated event occurrence message 900 is written as a SIP-based PUBLISH message. The Event header 910 of the event occurrence message 900 indicates that the type of the message is a probe regarding an event occurrence, and the Content-Type header 920 indicates that a specific event type is attached as an XML document 930. The <type> element 931 of the XML document 930 indicates that the event occurrence message 900 is generated by the operation of the sensor, and the <source> element 932 indicates that the control terminal 20 of the controlled terminal 20 generated the event. It represents an address.

According to an embodiment of the present invention, the VME 130 may store information on event occurrence for each controlled terminal, event occurrence time, or event type. Subsequently, the control terminal 10 may request an event record for each controlled terminal, for each event occurrence time, or for each event type, and the VME 130 collects an event record corresponding to a condition requested by the control terminal 10 to control the terminal. (10) can be provided. For example, when the control terminal 10 requests the event recording occurring in a specific time zone, the VME 130 sends information to the control terminal 10 about the number of event occurrences in the corresponding time zone for each controlled terminal and event type. Can provide.

Referring back to FIG. 8, the VME 130 transmits a response message (for example, 200 OK message) to the CSCF 110-2 in response to the event occurrence message (S830), and the CSCF 110-2 avoids this. It can transmit to the control terminal 20 (S840).

Meanwhile, the VME 130 may transmit an event notification message indicating that an event has occurred in the controlled terminal 20 to the CSCF 110-1 (S850). An example of an event notification message transmitted by the VME 130 is illustrated in FIG. 10. The illustrated event notification message 1000 is written as a SIP-based NOTIFY message and includes an XML document 1010 indicating that the event is generated by the operation of the sensor. Of course, the event occurrence message transmitted by the controlled terminal 20 and the event notification message transmitted by the VME 130 need not be implemented as different messages.

The CSCF 1010 may transmit an event notification message to the control terminal 10 (S860).

The control terminal 10 may transmit a response message (for example, 200 OK message) to the CSCF 110-1 in response to the event notification message (S870), and the CSCF 110-1 may transmit it to the VME 130. There is (S880).

Meanwhile, the control terminal 10 receiving the event notification message may output information indicating that an event has occurred to the controlled terminal 20 to the user using a display or a speaker, and the user may use the controlled terminal 20 to output the information. You can see that the event occurred at).

8 and 10 illustrate that the event notification message transmitted from the VME 130 to the control terminal 10 is an IMS message, the present invention is not limited thereto. According to another embodiment, the VME 130 may transmit an event notification message based on a short message service (SMS) or a multimedia messaging service (MMS) to the control device 10. The embodiment in which the VME 130 transmits an event notification message using SMS or MMS may be applied when the IMS-based session of the control terminal 10 is terminated.

Meanwhile, as illustrated in FIG. 8, when an event occurs in the controlled terminal 20, the controlled terminal 20 may transmit image data generated through a shooting operation to the VME 130, and the VME 130 may Video data transmitted by the control terminal 20 can be stored. If a media connection is not formed between the controlled terminal 20 and the VME 130, the operation of establishing a media connection between the controlled terminal 20 and the VME 130 may be preceded before the image data is transmitted.

According to an embodiment of the present invention, the image data stored by the VME 130 may correspond to the photographing portion during a predetermined time interval before and after the event occurs. Of course, it does not mean that the controlled terminal 20 transmits image data to the VME 130 only when an event occurs, and the VME 130 needs to store it. For example, the controlled terminal 20 may transmit the captured image data to the VME 130 in real time, and the VME 130 may store the image data of the controlled terminal 20 in real time. . According to an embodiment of the present invention, the image data stored in the VME 130 may be separated and managed for each preset time zone according to the generated time.

As such, the VME 130 may store and manage image data generated by each controlled terminal for each event or for each preset time zone. Preferably, the video data may be stored and managed in the form of Video On Demand (VOD). The user may check the image data list of the controlled terminal stored in the VME 130 by using the control terminal 10. An embodiment thereof is illustrated in FIG. 11.

The control terminal 10 may transmit a video data list request message requesting a video data list (S1110), and the CSCF 110 may transmit it to the VME 130 (S1120). 12 illustrates a video data list request message according to an embodiment of the present invention. The illustrated video data list request message 1200 is implemented as a SIP-based SUBSCRIBE message, and sets the time at which video data is generated as a condition of the video data list. More specifically, the video data list request message 1200 shown in FIG. 12 is a date and time defined in the <start-time> element 1211 of the XML document 1210 (June 25, 2008, 16:12:00 seconds). ) To request the image data list including the image data generated between the date and time defined in the <end-time> element 1212 (June 25, 2008 23:59:59). In addition, other conditions necessary for determining which image data to include in the list may be used. For example, the control terminal 10 specifies the controlled terminal in the video data list request message or specifies the event type, so that the video data generated by the controlled terminal or video data generated when the corresponding event occurs in the video data list. You can ask to include it. Embodiments of requesting a list of image data using a plurality of such conditions may be possible. In addition, other types of conditions may be used.

Referring back to FIG. 11, upon receiving the video data list request message, the VME 130 transmits a response message (for example, 200 OK message) to the CSCF 110 (S1130), and the CSCF 110 controls it. It can transmit to (10) (S1140).

The VME 130 may analyze the video data list request message, generate a video data list meeting the condition requested by the control terminal 10, and transmit a video data list notification message including the same to the CSCF 110 (S1150). ). 13 illustrates a video data list notification message according to an embodiment of the present invention. The illustrated video data list notification message 1300 is written as a SIP-based NOTIFY message and includes a video data list 1310 written in an XML document. In FIG. 13, the image data list 1310 includes two entries 1320 and 1330 including information about two image data. Each entry 1320 and 1330 includes file names 1321 and 1331 of the image data and information on event contents 1322 and 1332 related to the image data. The event content 1322 is set to 'area_in', which indicates that there was a movement of an object in and out of the protection area through the virtual line of the image frame as described with reference to FIGS. 7A and 7B. The event content 1332 is also set to 'area_out', which indicates that there was a movement of an object out of the protection area through the virtual line.

In addition, the image data list 1310 illustrated in FIG. 13 may also include an address 1340 of a controlled terminal that generates image data corresponding to each of the entries 1310 and 1320. In the embodiment shown in Fig. 13, the file names 1311 and 131 of the image data are obtained by concatenating the address of the controlled terminal generating the image data with the date and time information at which the image data was generated. It may be separately included in the image data list.

Referring back to FIG. 11, the CSCF 110 may transmit a video data list notification message to the control terminal 10 (S1160), and the control terminal 10 may respond to the response message (for example, 200 OK message). To the CSCF 110 (S1170), and the CSCF 110 may transmit it to the VME 130 (S1180).

The control terminal 10 may extract the image data list from the image data list notification message and display the image data list to the user, and the user may select desired image data through the image data list and request reproduction thereof.

14 is a flowchart illustrating a process of forming a media connection between the control terminal 10 and the VME 130 according to an embodiment of the present invention.

The control terminal 10 may transmit a session request message for establishing a media connection with the VME 130 to the CSCF 110 (S1410). The session request message may be implemented as a SIP-based INVITE message, and includes the address of the VME 130 (for example, the URL of the VME 130) as a destination address, and is included in the video data requested by the control terminal 10. Information may be included (for example, a file name of image data).

The CSCF 110 may transmit a response message (for example, 100 Trying message) indicating that the call processing is in progress to the control terminal 10 (S1420), and transmit a session request message to the VME 130 (S1430). .

Upon receiving the session request message, the VME 130 may transmit a response message (for example, 100 Trying message) to the CSCF 110 (S1440).

Thereafter, the VME 130 may prepare to transmit the image data requested by the control terminal 10 by interpreting the session request message. When the preparation is completed, the VME 130 may transmit a session response message (for example, 200 OK message) to the CSCF 110 (S1450), and the CSCF 110 may transmit it to the control terminal 10 (S1460). ).

Through this process, a media connection may be formed between the control terminal 10 and the VME 130 (S1470). The VME 130 may transmit image data to the control terminal 10 using the media connection, and the control terminal 10 may display the transmitted image data to the user. The VME 130 may provide a video data to the control terminal 10 may be a download method or a streaming method.

The process of forming a media connection between the VME 130 and the controlled terminal 10 may also be performed similarly to the process of FIG. 14. However, whether the VME 130 and the controlled terminal 10 transmit a session establishment request message for forming a media connection may vary depending on the embodiment.

On the other hand, the control terminal 10 through the VME 10 described above through the process of FIG. 5 described above, the other control terminal while the media connection is formed with the controlled terminal 20 is connected to the image data of the same controlled terminal 20 In case of being provided, the other control terminal can form a media connection with the VME 130 through the process as shown in FIG. 14. Of course, the session request message transmitted by another control terminal may include the address of the controlled terminal 20, and information about desired image data may be omitted. In this case, the VME 130 may transmit image data provided by the controlled terminal 20 to both the control terminal 10 and the other control terminal.

According to an embodiment of the present invention, the control terminal 10 may control the controlled terminal 20 based on the IMS 30, and an embodiment thereof is illustrated in FIG. 15.

The control terminal 10 may transmit a control request message for requesting control of the controlled terminal 20 to the CSCF 110-1 (S1510). 16 illustrates a control request message according to an embodiment of the present invention. The illustrated control request message 1600 is implemented as a SIP-based INFO message, and control information 1610 representing specific control content is written in an XML document. The control information 1610 includes a <target> element 1611 indicating an address of a controlled terminal 20 to be controlled and a <type> element 1612 indicating a type of a control request. In FIG. 16, the <type> element 1612 is set to 'pan-left', which indicates a control request to move the photographing module of the controlled terminal 20 to the left. Table 1 shows a control request type according to an embodiment of the present invention.

Table 1

Control request types Contents pan-left Control request to move the shooting module of the controlled device to the left pan-right Control request to move the shooting module of the controlled device to the right tilt-up Control request to move the imaging module of the controlled device upward tilt-down Control request to move the shooting module of the controlled device downward zoom-in Zoom-in control request for shooting module of controlled device zoom-out Request to control the shooting module zoomout of the controlled device preset Control request to move the shooting module of the controlled device to the preset reference position

When a plurality of reference positions are specified in advance for a camera of one controlled device, among the control request types shown in Table 1, a plurality of preset control requests may exist, such as preset0, preset1, or preset2. have. For example, if two reference positions are set for the photographing module of the controlled device, the “preset0” control request is a control request for moving the imaging module to the first reference position, and the “preset1” control request is set to the second reference position. It may be a control request for moving the imaging module. Since the control types in Table 1 are exemplary, the present invention is not limited thereto.

Referring back to FIG. 15, the CSCF 110-1 may transmit a control request message to the VME 130 (S1520), and the VME 130 may send a response message (for example, a 200 OK message) to the CSCF ( 110-1) and the CSCF 110-1 may transmit it to the control terminal 10 (S1540).

Meanwhile, the VME 130 may transmit a control request message to the CSCF 110-2 to which the controlled terminal 20 is connected (S1550), and the CSCF 110-2 transmits the control request message to the controlled terminal 20. It can transmit (S1560).

Upon receiving the control request message, the controlled terminal 20 transmits a response message (for example, 200 OK message) to the CSCF 110-2 in response to the control request message (S1570), and the CSCF 110-2 does this. It may transmit to the VME (130) (S1580).

The controlled terminal 20 may analyze a control request message and perform a function corresponding to the control request of the control terminal 10. According to an embodiment of the present invention, the controlled terminal 20 sends the processing result of the control request to the control terminal 10 through the CSCF 110-2, the VME 130, and the CSCF 110-1. You can also send.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. You can understand that there is. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

1 is a diagram illustrating a security service system 100 according to an embodiment of the present invention.

2 is a view showing a location registration operation according to an embodiment of the present invention.

3 is a flowchart illustrating a process of acquiring a list of controlled terminals by a control terminal according to an embodiment of the present invention.

4 is a diagram illustrating a controlled terminal list notification message according to an embodiment of the present invention.

5 is a flowchart illustrating a process of forming a media connection between a control terminal and a controlled terminal according to an embodiment of the present invention.

6 is a diagram illustrating a security service usage situation according to an embodiment of the present invention.

7A is a diagram illustrating a virtual line setting state of an image frame according to an embodiment of the present invention.

7B is a diagram illustrating a virtual line setting state of an image frame according to another embodiment of the present invention.

8 is a flowchart illustrating a security service providing process according to an embodiment of the present invention.

9 is a diagram illustrating an event occurrence message according to an embodiment of the present invention.

10 illustrates an event notification message according to an embodiment of the present invention.

11 is a flowchart illustrating a process of acquiring an event list from a VME by a control terminal according to an embodiment of the present invention.

12 is a flowchart illustrating a video data list request message according to an embodiment of the present invention.

13 is a diagram illustrating a video data list notification message according to an embodiment of the present invention.

14 is a flowchart illustrating a process of forming a media connection between a control terminal and a VME according to an embodiment of the present invention.

15 is a flowchart illustrating a process of controlling, by a control terminal, a controlled terminal according to an embodiment of the present invention.

16 illustrates a control request message according to an embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

10: control terminal 20: controlled terminal

30: IMS 110: CSCF

120: HSS 130: VME

Claims (15)

Establishing an internet protocol multimedia subsystem session with the controlled terminal; Receiving an event generation message based on an internet protocol subsystem informing of occurrence of an event from a controlled terminal in which the internet protocol multimedia subsystem session is formed; And And transmitting an event notification message notifying the occurrence of an event of the controlled terminal to a control terminal. The method of claim 1, And the event occurrence message and the event notification message include an address of the controlled terminal and a type of event generated. 3. The method of claim 2, The event type may include a first type indicating a case where an abnormal state is detected by a sensor connected to the controlled terminal, and a case indicating a motion of an object on an image frame generated by a photographing module connected to the controlled terminal. And at least one of a second type and a third type representing a case where a movement of an object passing through an imaginary line defining a virtual area on the image frame is detected. Way. The method of claim 3, wherein When the type of the event is the third type, the event occurrence message and the event notification message indicate whether the movement of the object is a movement passing through the virtual line inwards out of the protection area, or the virtual line out of the protection area. Further comprising direction information indicating whether movement is passing. The method of claim 1, The event notification message is any one of an internet protocol multimedia subsystem based message, a short message service based message, and a multimedia messaging service based message. The method of claim 5, When the control terminal is establishing an internet protocol multimedia subsystem session, the event notification message is an internet protocol multimedia subsystem based message, If the control terminal is not establishing an internet protocol multimedia subsystem session, the event notification message is one of a short message service based message and a multimedia messaging service based message. The method of claim 1, Forming a media connection with the controlled terminal, and receiving image data including an image of the time point of occurrence of the event from the controlled terminal through the media connection; And And storing the received image data. The method of claim 7, wherein Forming a media connection with the control terminal and transmitting the image data to the control terminal via the media connection. A call session control device for establishing an internet protocol multimedia subsystem session of a controlled terminal; And When the event generation message based on the Internet protocol subsystem notifying the occurrence of the event is received from the controlled terminal in which the Internet protocol multimedia subsystem session is established, the image media transmitting an event notification message informing the controller terminal of the event occurrence. An internet protocol multimedia subsystem based security service system comprising a control server. The method of claim 9, And the event occurrence message and the event notification message include an address of the controlled terminal and a type of event generated. The method of claim 10, The event type may include a first type indicating a case where an abnormal state is detected by a sensor connected to the controlled terminal, and a case indicating a motion of an object on an image frame generated by a photographing module connected to the controlled terminal. And at least one of a second type and a third type representing a case where a movement of an object passing through an imaginary line defining a virtual area on the image frame is detected. system. The method of claim 11, When the type of the event is the third type, the event occurrence message and the event notification message indicate whether the movement of the object is a movement passing through the virtual line inwards out of the protection area, or the virtual line out of the protection area. Further comprising direction information indicating whether movement is passing. The method of claim 9, The event notification message is any one of an internet protocol multimedia subsystem based message, a short message service based message and a multimedia messaging service based message. The method of claim 13, When the control terminal is establishing an internet protocol multimedia subsystem session, the event notification message is an internet protocol multimedia subsystem based message, And when the control terminal is not establishing an internet protocol multimedia subsystem session, the event notification message is one of a short message service based message and a multimedia messaging service based message. The method of claim 9, When image data including an image of the event occurrence time is received from the controlled terminal, the image media control server stores the received image data and transmits the image data to the control terminal. System based security service system.

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