KR20090034594A - Method and system for providing file transfer service - Google Patents

Abstract

A method and a system for providing a file transfer service are provided to relay and transmit file data between first and second user devices through a setup file transfer session. A message which requests the file transfer connection with a second user device is transmitted from a first user device(S301). The connection request message is transmitted to the second user device(S302), and a response message is transmitted from the second user device(S303). A session for the file transfer with the first user device is set up(S304). File data are related and transmitted between the first and second user devices through the setup file transfer session(S305, S306).

Description

Method and system for providing file transfer service in IP multimedia subsystem {Method and system for providing file transfer service}

The present invention relates to an IP multimedia subsystem, and more particularly, to a method and a system for providing a file transfer service in an 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. Of course, this means that non-real-time services such as file transfer, e-mail, and short message 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.

An object of the present invention is to provide a method and system for providing a file transfer service in an 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, the method of providing a file transfer service in the IP multimedia subsystem according to an embodiment of the present invention, the step of receiving a file transfer connection request message from the first user device to the second user device, the second Transmitting the connection request message to a user device, receiving a response message from the second user device, establishing a file transfer session, establishing a file transfer session with the first user device, and setting the file transfer Relaying file data between the first user device and the second user device via a session.

In addition, the file transfer service providing system in the IP multimedia subsystem according to an embodiment of the present invention, the connection unit for relaying the file transfer connection message from the first user device to the second user device, the first user device and the first And a session setting unit for setting a file transfer session with each of the user devices, and a data transmission unit for relaying file data between the first user device and the second user device through the set file transfer session.

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 describing a method and a file transfer service providing method in an IP multimedia subsystem according to embodiments of the present invention.

1 is a view showing a file transfer service providing system in the IP multimedia subsystem according to an embodiment of the present invention.

In the IP multimedia subsystem according to an embodiment of the present invention, a file transfer service providing system includes a file transfer agent (FTMS Agent) including a connection unit 101, a session setup unit 102, and a data transmission unit 103. And a scheme server 104, a service CSCF 105, and a proxy CSCF 106 constituting the IMS system. In addition, they are connected to the user devices 109 and 110 via the packet data network 107 and the wireless network 108.

The user devices 109 and 110 are a plurality of terminals located in a communication area divided and allocated in sector units. In the embodiment of the present invention, a cellular phone, a personal communication service (PCS) phone, on which a 3GPP SIP-based module is mounted, This includes PDA phones, GSM phones, CDMA-2000 phones, WCDMA phones, DMB phones, and so on. The wireless network 108 includes a Node-B and a base station controller (RNC), and the packet data network 107 is located at an end of an access network and is an access network for transmitting packet data to a user device, such as GPRS, WCDMA, or CDMA. It may be an IP capability access network (IP-CAN).

In the present invention, a user device requesting a file transfer service is defined as a first user device, and a user device which is a target of the file transfer service request is defined as a second user device.

The user equipment receives a signal transmitted from the wireless network 108 in a serving cell of the wireless network 108 and wirelessly transmits a signal according to voice or data input from the subscriber through the base station. To transmit. The wireless network 108 transmits a signal received from a user device included in the corresponding service cell to the packet data network 107 connected to the wired network, and wirelessly transmits a signal received from each packet data network 107. To a user device included in the corresponding service cell. That is, the wireless network 108 allocates or releases a radio channel for the user equipment included in the service cell, and handles handoff to ensure the mobility of the user equipment. In addition, the wireless network 108 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 the signal to a packet data network 107 connected to a wired network. The digital signal received from the data network 107 is converted into an analog signal that can be transmitted wirelessly and transmitted to the user device.

In addition, the packet data network 107 converts a signal received from the wireless network 108 into an IP packet and transmits it to the IMS, and converts an IP packet transmitted from the IMS into a signal and transmits the signal to the wireless network 108. The IMS then provides the integrated service to the user device according to the received IP packet.

The CSCF may perform basic functions for session initiation protocol (SIP) based session control, such as subscriber registration, authentication, service triggering, routing, various call control, and address handling. Since the Call Session Control Function (CSCF) performs different functions depending on the network in which the subscriber is located, the Proxy-CSCF (P-CSCF) and the Inquiring Interaction-CSCF (I-CF) are based on the location and role. CSCF), and service CSCF (Serving-CSCF; S-CSCF).

In the present invention, it is assumed that the user equipment has completed the registration procedure in the IMS system through the proxy CSCF 106, the inquiry CSCF (not shown), and the service CSCF 105. Accordingly, in the present invention, a message transmitted between a file transfer agent and a user device, which is a kind of application server using the SIP protocol, is relayed through the proxy CSCF 106 and the service CSCF 108.

In addition, the scheme (Service Capability Interaction Manager) server 104 is a broker that manages the interaction between other application servers. Therefore, it is possible to relay and manage messages transmitted and received between the service CSCF 105 and the application server.

The connection unit 101 transmits and receives a message using the SIP protocol transmitted from the user device (109, 110). Receives a message INVITE for an instant messaging or file transfer connection request from a first user device, and reconfigures and relays the message to a second user device that is the target of the connection. Since the message transmitted and received with the user device through the connection is a message using the SIP protocol, the proxy CSCF 106, the service CSCF 105 and the scheme server 104 relays and transmits the message.

The session establishment unit 102 receives a response message (ACK) from the user device that has received the message (INVITE) for the instant messaging or file transfer connection request, and then establishes an instant messaging session or file transfer session connection with the user device. Set it.

The data transmitter 103 relays the instant message data or the file data by using a message session relay protocol (MSRP) through a session established with the user device.

2 is a diagram illustrating a method for establishing an instant messaging session for providing a file transfer service in an IP multimedia subsystem according to an exemplary embodiment of the present invention.

In one embodiment of the present invention, the file transfer service may be provided together with an instant messaging service. First, an instant messaging session establishment step for providing an instant messaging service between a first user device and a second user device is as follows.

The first user device that has already completed the registration procedure with the IMS system transmits a message to the connection unit 101 to request an instant messaging connection with the second user device (S201). The message includes an identifier of the file transfer agent that has the INVITE method and includes the connection as a response identifier (URI). The message includes a message body and session information of the first user device to be used for session connection with the second user device and an identifier of the second user device. In this case, in order to increase the efficiency of processing and transmitting the message, the data may be configured in SDP format or XML format, respectively.

The identifier URI includes a Private Uniform Resource Identifier (URI) and a Public Uniform Resource Identifier (URI) of the user device. The unique URI has the same concept as the International Mobile Subscriber Identity (IMSI) in the WCDMA system and follows the Network Access Identifier (NAI) structure. The public URI has the same concept as a Mobile Subscriber ISDN Number (MSISDN) in a WCDMA system and has a SIP-URI structure or a TEL-URI structure.

The connection unit 101 receiving the message transmits a connection message INVITE including the identifier URI of the second user device included in the message as a SIP identifier to the second user device (S202).

Upon receiving the INVITE message, the second user device inquires on the screen whether to accept the connection request from the first user device, and receives a response. If the user of the second user device rejects the request, a rejection response message will be sent to the connection unit 101, and if the user permits the request, the second user device proceeds with the following procedure.

The second user device returns a "180 Ringing" and "200 OK" message to the connection unit 101 in response (S203). At this time, an instant messaging session is established between the session establishment unit 102 included in the file transfer agent and the second user device. The connection unit 101 receiving the response message transmits the " 180 Ringing " and " 200 OK " messages to a first user device, and the session establishment unit 102 provides an instant for transmitting and receiving an instant message with the first user device. A messaging session is established (S204).

As a next process, the first user device and the second user device transmit a SUBSCRIBE message including a conference event to the connection unit 101 to inform that they are chatting (S205, S206).

Since the data transmission unit 103 has an instant messaging session for transmitting and receiving instant messages with the first user device and the second user device, respectively, the data transmission unit 103 relays the instant message using the Message Session Relay Protocol (MSRP) through the session. (S207, S208).

3 is a view showing a file transfer service providing method in the IP multimedia subsystem according to an embodiment of the present invention.

As an embodiment of the present invention, a file transfer service may be provided by performing the following steps while the instant messaging service is provided. As another embodiment of the present invention, a file transfer service may be provided by performing the following steps even when the instant messaging service is not provided.

The first user device transmits a message to the connection unit 101 to request a file transfer connection with the second user device (S301). The message includes an identifier of the file transfer agent that has the INVITE method and includes the connection as a response identifier (URI). This is to receive a file transfer service through the file transfer agent. The message includes a message body and session information of the first user device to be used for session connection with the second user device and an identifier of the second user device. In this case, in order to increase the efficiency of processing and transmitting the message, the data may be configured in SDP format or XML format, respectively.

The connection unit 101 receiving the message transmits a connection message (INVITE) including the identifier URI (URI) of the second user device included in the message as a SIP identifier (S302).

Upon receiving the INVITE message, the second user device inquires on the screen whether to accept the connection request from the first user device, and receives a response. If the user of the second user device rejects the request, a rejection response message will be sent to the connection unit 101, and if the user permits the request, the second user device proceeds with the following procedure.

The second user device returns a "180 Ringing" and "200 OK" message to the connection unit 101 in response (S303). At this time, a file transfer session for transmitting and receiving file data is established between the session setting unit 102 included in the file transfer agent and the second user device. The connection unit 101 receiving the response message transmits the "180 Ringing" and "200 OK" messages to the first user device, and the session establishment unit 102 sends a file for transmitting and receiving file data with the first user device. A transmission session is set (S304).

If the file transfer service is not used while using the instant messaging service, the first user device and the second user device transmit a SUBSCRIBE message including a conference event to the connection unit 101 to indicate that the user is transmitting a file. .

Since the data transmission unit 103 has a file transfer session for transmitting and receiving file data with the first user device and the second user device, respectively, the data transmission unit 103 uses the Message Session Relay Protocol (MSRP) through the file transfer session. Relay transmission (S305, S306).

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 claims, which will be described later 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 view showing a file transfer service providing system in the IP multimedia subsystem according to an embodiment of the present invention.

2 is a diagram illustrating a method for establishing an instant messaging session for providing a file transfer service in an IP multimedia subsystem according to an exemplary embodiment of the present invention.

3 is a diagram illustrating a method of providing a file transfer service in an IP multimedia subsystem according to an exemplary embodiment of the present invention.

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

101: connection unit 102: session setting unit

103: data transmission unit

Claims (12)

(A) receiving a file transfer connection request message from the first user device to the second user device; (B) sending the connection request message to the second user device; (C) receiving a response message from the second user device and establishing a file transfer session; (D) establishing a file transfer session with the first user device; And (E) relaying file data between the first user device and the second user device through the established file transfer session. The method of claim 1, And receiving a SUBSCRIBE message indicating that the session is transferring a file from each connected user device. The method of claim 1, The step (e) relays the file data between the first user device and the second user device using a Message Session Relay Protocol (MSRP) through the established file transfer session. How to provide a delivery service. The method of claim 1, The second user device comprises at least two user devices, Step (b) comprises sending the connection request message to each second user device, Step (c) comprises receiving a response message from each second user device and establishing a file transfer session, And (e) relaying file data between the first user device and each of the second user devices through the established file transfer session. The method of claim 1, In the step (c), if the second user device allows the connection request with the first user device, the step (c) establishes the file transfer session after receiving the OK response message, and if the connection request is not allowed, rejects the response. A method of providing a file transfer service in an IP multimedia subsystem receiving a message. The method of claim 1, Receiving an instant messaging connection request message from the first user device to the second user device; Sending the instant messaging connection request message to the second user device; Receiving a response message from the second user device and establishing an instant messaging session; Establishing an instant messaging session with the first user device; And Relaying an instant message between the first user device and the second user device via the established instant messaging session. A connection unit which relays a file transfer connection message from the first user device to the second user device; A session establishment unit configured to establish a file transfer session with the first user device and the second user device, respectively; And And a data transmitter for relaying file data between the first user device and the second user device through the set file transfer session. The method of claim 7, wherein And a scheme server for relaying and transmitting a message transmitted and received between the connection unit and the session establishment unit and the respective user devices. The connection unit and the session establishment unit transmits and receives a message with the respective user device through a scheme server, file transfer service providing system in the IP multimedia subsystem. The method of claim 7, wherein The connecting unit may further include a function of receiving a SUBSCRIBE message indicating that the file transfer session is transmitting a file from each connected user device, the file transfer service providing system in the IP multimedia subsystem. The method of claim 7, wherein The data transmission unit relays file data between the first user device and the second user device using a message session relay protocol (MSRP) through the established file transfer session, and provides a file transfer service in an IP multimedia subsystem. system. The method of claim 7, wherein The connecting portion further includes a function of relaying an instant messaging connection message from the first user device to the at least one second user device, The session establishment unit further includes a function of establishing an instant messaging session with the first user device and the second user device, respectively. And an instant message transmitter configured to relay an instant message between the first user device and the second user device through the set instant messaging session. The method of claim 11, The instant message transmission unit relays an instant message between the first user device and the second user device using a message session relay protocol (MSRP) through the established instant messaging session. Provide system.

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