KR20090034591A - Method and system for providing presence service in ip multimedia subsystem - Google Patents

Abstract

A method and a system for providing a presence service in an IP multimedia subsystem are provided to judge in advance whether or not a user at a remote place receives a message on the internet. A message which requests the registration of a second user device is transmitted from a first user device to a buddy list registration unit included in a presence agent(S201). The first user device transmits a subscribe message to a service CSCF(S203), and the service CSCF transmits the message to an SCIM(Service Capability Interaction Manager) sever(S204). The SCIM sever transmits the message to a subscription processing unit included in the presence agent(S205), and the presence information of the second user device is transmitted to the first user device(S208).

Description

Method and system for providing presence service in IP multimedia subsystem {Method and system for providing presence service in IP Multimedia Subsystem}

The present invention relates to an IP multimedia subsystem, and more particularly, to a presence service providing system and method in the IP multimedia subsystem.

Recently, with the rapid development of mobile communication and the Internet, it is required to realize various multimedia services of high quality for mobile subscribers. The development of the Internet multimedia service required a change from a conventional circuit-based core network to a packet-based core network, and furthermore, a next-generation core network in the form of an IP-based core network ( Core network).

Currently, 3GPP is standardizing ALL IP-based network reference model to provide IP-based Multimedia Service. IP-based multimedia service refers to a service that can simultaneously provide various types of packet-based services based on IP transport protocol to mobile subscribers, which is a real-time service such as voice and video. Of course, this means that non-time services such as file transfer, e-mail, and short messages can be used simultaneously or new services using these services can be used.

As a key technology for providing new services in such an All-IP based communication environment, an IP Multimedia Subsystem (hereinafter referred to as IMS) is defined to provide various services to subscribers based on an ALL-IP network. Is attracting attention. The IMS network standardized the ALL-IP reference model and accommodated various gateway functions with various interface schemes, and standardized interface schemes and protocols with other functional elements related to them by linking with IETF. The IMS network is divided into a control layer that provides a session control function based on a packet service domain, a user layer that provides traffic, and an application layer that provides a service function.

Presence Service is a service for receiving the presence information of a specific user who is away from the Internet. The presence service is a user that can communicate in real time, what services are available, what the user is currently doing, Provides various information about the user, such as how it is. In the case of a service provided in real time, such as instant messaging, there can be many advantages if the user who is away from the Internet can determine whether or not to receive the message in advance and send the message. Presence-based instant messaging services have been created, and it has become a useful means of providing various multimedia data in real time to on-line contacts.

An object of the present invention is to provide a method and system for providing a presence service in the IP multimedia subsystem.

The object of the present invention is not limited to the above-mentioned object, 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 the IP multimedia subsystem according to an embodiment of the present invention, a method for providing a presence service includes receiving and registering a second user device buddy registration request from a first user device registered in an IMS; Receiving and processing the presence information subscription request of the second user device from the first user device, and transmitting the presence information of the second user device to the first user device.

In addition, the presence service providing system in the IP multimedia subsystem according to an embodiment of the present invention, a buddy list register for receiving and registering a second user device buddy registration request from the first user device registered in the IMS, the first And a subscription processor configured to receive and subscribe to the presence information subscription request of the second user device from the user device, and a presence information transmitter to transmit the presence information of the second user device to the first user device.

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

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and only the embodiments make the disclosure of the present invention complete, and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, the present invention will be described with reference to the drawings for explaining the presence service providing method and system in the IP multimedia subsystem according to embodiments of the present invention.

First, in an embodiment of the present invention, a user device including the first user device 109 and the second user device 110 may be a signal transmitted from the wireless network 108 in a serving cell of the wireless network 108. And transmits a signal based on voice or data input from the subscriber to the wireless network through the base station. The wireless network 108 transmits a signal received from a user device included in the corresponding service cell to a packet data network connected through a wired network, and wirelessly includes a signal received from each packet data network in the corresponding service cell. To the user device. That is, the wireless network allocates or releases a radio channel for a user device included in a service cell, and handles a handoff to ensure mobility of the user device. In addition, the wireless network converts an analog signal received from a user device included in a service cell into a digital signal that can be transmitted to an E1 / T1 level line and transmits it to a packet data network connected to a wired network, and receives the digital signal from the packet data network. The signal is converted into an analog signal that can be transmitted wirelessly and transmitted to the user device.

The user device is a plurality of terminals located in a communication area divided by sectors, and according to an embodiment of the present invention, a cellular phone, a PCS (Personal Communication Service) phone, a PDA phone, and a GSM in which a 3GPP SIP-based module is mounted. This includes phones, CDMA-2000 phones, WCDMA phones, DMB phones, and so on. The wireless network includes a Node-B and a base station controller (RNC), and the packet data network is located at the end of the access network and is an access network for transmitting packet data to the user equipment. IP-CAN (IP capability such as GPRS, WCDMA, CDMA, etc.) access network).

1 is a diagram illustrating a presence service providing system in an IP multimedia subsystem according to an exemplary embodiment of the present invention.

Presence service providing system in the IP multimedia subsystem according to an embodiment of the present invention, the buddy list registration unit 101, subscription processing unit 102, presence information transmission unit 103, registration permission query unit 104, and the presence Presence Agent (PA) including a rule update unit 105, a service CSCF 106, and a Scheme (Service Capability Interaction Manager (SCIM) server 107).

Since this system is based on IMS, it basically uses IETF standard Session Initiation Protocol (SIP) and extension P header (SIP Extension P header) to communicate with each other.

The buddy list registration unit 101 is a module included in the presence agent and receives a message for buddy registration from another user device (hereinafter referred to as a second user device) from a user device (hereinafter referred to as a first user device). The message may have an XML format using an XML Configuration Access Protocol (XCAP). At this time, the transmission method is a PUT, and requests buddy registration by including a group name and a name of a counterpart to be added in the message. The buddy list register 101 analyzes the XML structure of the received message and adds the second user device to the resource-lists of the first user device which sent the message by the group and the name. Register. It may include a separate data management server (Data Manipulation Server) for storing the resource list.

The subscription processing unit 102 processes the subscribing to receive the presence information of the normally registered second user device from the first user device. Receive a request to join the presence information of the second user device by receiving a SUBSCRIBE message from the first user device. At this time, the 'presence' package name should be described in the Event header of the SUBSCRIBE message to indicate that the presence information is requested. After receiving the request message, the presence information transmitter 103 determines whether the presence information of the second user device may be provided to the first user device, and if not, the presence information of the second user device through the NOTIFY message. To the first user device. Thereafter, whenever the presence information of the second user device is changed, the device notifies the first user device of the presence information of the second user device in real time.

The registration permission query unit 104 provides watcher info of the first user device that has registered itself with the second user device, and inquires and responds to whether the presence information of the second user device may be transmitted to the first user device. Receive. If the presence of the "200 OK" message is sent to the presence information transmission unit 103 may determine whether or not to transmit the presence information.

The presence rule updater 105 manages a rule regarding whether or not the presence information may be transmitted to a watcher that receives the presence information. Thus, each user device can send a message to update or register its presence rules. The message may have an XML format using an XML Configuration Access Protocol (XCAP). At this time, the transmission method is a PUT and requests buddy registration by including the presence rule information in the message. The presence rule updater 105 analyzes the XML structure of the received message and updates or registers the presence rules of the first user device which has sent the message. The presence information transmitter 103 may determine whether to transmit the presence information according to the presence rule. A data management server may be included to store a user profile (ua-profile) including the presence rule and the resource list.

The service CSCF 106 interworks with a home subscriber server as well as a Morrison session state management function in the IMS system to receive a subscriber profile and perform a main function for call processing. In the presence service providing system in the IP multimedia subsystem according to the preferred embodiment of the present invention, in addition to the above functions, the system may relay and transmit a message transmitted and received between the subscription processing unit and the first user device, and between the presence information transmitter and the second user device. Relaying and transmitting a message transmitted and received, and relaying and transmitting a message transmitted and received between the registration permission query unit and the second user device.

The scheme server 107 is a broker that manages interaction between other application servers in the IMS system. It relays and manages messages transmitted and received between the service CSCF 109 and the application server. Therefore, Presence Agent (PA) including the buddy list registration unit 101, the subscription processing unit 102, the presence information transmission unit 103, the registration permission query unit 104, and the presence rule update unit 105; ) Is a kind of application server, and relays a Session Initiation Protocol (SIP) message transmitted and received between each module constituting the presence agent and the service CSCF.

2 is a flowchart illustrating a presence service providing method in an IP multimedia subsystem according to an exemplary embodiment of the present invention.

The second user device registration request message is transmitted from the first user device to the buddy list registration unit included in the presence agent (S201). The message may have an XML format using the XML Configuration Access Protocol (XCAP), and the transmission method is a PUT, and includes a group name and a name of a counterpart to be added in the message.

In operation S202, the message is transmitted to the presence rule update unit to define the presence rule from the first user device. The message may have an XML format using the XML Configuration Access Protocol (XCAP), and the transmission method is a PUT, and includes the presence rule related information in the message.

The first user device sends a SUBSCRIBE message to the service CSCF to receive the presence information of the registered second user device (S203), the service CSCF sends the message to the scheme server (S204), and the scheme server The message is transmitted to the subscription processing unit included in the presence agent (S205).

After normal processing in the subscription processing unit, the scheme server passes through the scheme server (S206), via the service CSCF (S207), and transmits the subscription message to the first user device that has sent (S208).

Next, the registration permission query unit included in the presence agent inquires whether to agree to the presence information transmission to the second user device registered as the resource list of the first user device. The query message is a Session Initiation Protocol (SIP) message that is relayed to the second user device via the scheme server (S209) and the service CSCF (S210) (S211). The query message includes watcher information of the first user device that has registered itself with the second user device. Then, a response to the query is received (S212, S213, S214).

The current state of the second user device is transmitted to the presence agent in real time, and the presence information of the second user device is updated (S215).

When the presence information of the second user device is updated, the updated presence information is transmitted to the subscribed first user device via the scheme server S216 and the service CSCF (S217) (S218).

Those skilled in the art will appreciate that the present invention can be embodied in other specific forms without changing the technical spirit or essential features of the present invention. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is indicated by the scope of the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalent concept are included in the scope of the present invention. Should be interpreted.

1 is a diagram illustrating a presence service providing system in an IP multimedia subsystem according to an exemplary embodiment of the present invention.

2 is a flowchart illustrating a presence service providing method in an IP multimedia subsystem according to an exemplary embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

108: wireless network 109: first user device

110: second user device

Claims (12)

(A) receiving and registering a second user device buddy registration request from a first user device registered in the IMS; (B) receiving and processing a presence information subscription request of the second user device from the first user device; And (C) transmitting the presence information of the second user device to the first user device. The method of claim 1, In the step (a), the second user device buddy registration request is received from the first user device registered in the IMS in an XML format through XCAP and is registered. The method of claim 1, And (a-1) receiving and storing the presence rule from the first user device. The method of claim 3, The step (a-1) is a method for providing a presence service in the IP multimedia subsystem, which receives and stores the presence rule from the first user device in an XML format through XCAP. The method of claim 1, Querying the second user device for permission to register the first user device; And (c) transmitting the presence information of the second user device to the first user device when the registration is permitted. A buddy list registration unit for receiving and registering a second user device buddy registration request from a first user device registered in the IMS; A subscription processing unit configured to receive and subscribe to the presence information subscription request of the second user device from the first user device; And Presence information transmission system for transmitting the presence information of the second user device to the first user device, the presence service system in the IP multimedia subsystem. The method of claim 6, And the buddy list registration unit receives and registers a second user device buddy registration request in an XML format through XCAP from a first user device registered in the IMS. The method of claim 6, Presence rule update unit for receiving and storing the presence rule from the first user device, the presence service providing system in the IP multimedia subsystem. The method of claim 8, The presence rule updating unit receives and stores the presence rule from the first user device in the XML format through the XCAP, the presence service providing system in the IP multimedia subsystem. The method of claim 6, And a registration permission query unit that queries the second user device whether to permit registration of the first user device. The presence information transmitter transmits the presence information of the second user device to the first user device when the registration permission query unit receives a response allowing registration from the second user device. Provide system. The method of claim 10, Relaying and transmitting a message transmitted and received between the subscription processing unit and the first user device, relaying and transmitting a message transmitted and received between the presence information transmitting unit and the second user device, and transmitting and receiving between the registration permission query unit and the second user device. The service CSCF further comprises a service server relaying the message, and further comprising a scheme server for relaying the message transmitted and received between the subscription processing unit and the service CSCF, the presence service system in the IP multimedia subsystem. The method of claim 6, And a service CSCF for relaying messages transmitted and received between the subscription processor and the first user device, and relaying messages transmitted and received between the presence information transmitter and the second user device. system.

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