KR100471929B1 - A session initiation protocol processing apparatus of mobile communication network and mobile multi-media sub system thereof - Google Patents

Abstract

The present invention relates to an SIP protocol processing apparatus in a mobile communication network and a mobile multimedia subsystem having the same.

In the present invention, in the mobile multimedia subsystem for providing mobile multimedia services to a plurality of SIP user agents, acts as a substitute for providing mobile multimedia services on behalf of the SIP user agent connected to its network area. Proxy CSCF (Call State Control Function) server, service CSCF server that handles location registration and release of user terminal in home network to which SIP user agent belongs, and performs call control based on information related to user terminal, between network According to the interworking function, the inquiry CSCF server performs the form hiding and firewall functions between the networks and the call control based on the information related to the user terminal, and each CSCF server has a single S according to the standard specification of the mobile multimedia subsystem. Using IP It is characterized in that it comprises a SIP protocol processing apparatus for performing its own protocol processing, respectively. Through this, SIP protocol extension can be facilitated.

Description

 SIP protocol processing device in mobile communication network and mobile multimedia subsystem having same {A SESSION INITIATION PROTOCOL PROCESSING APPARATUS OF MOBILE COMMUNICATION NETWORK AND MOBILE MULTI-MEDIA SUB SYSTEM THEREOF}

The present invention relates to a mobile multimedia subsystem, and more particularly, to an SIP protocol processing apparatus and a mobile multimedia subsystem having the same in a mobile communication network that can be easily extended.

In general, a Call State Control Function (CSCF) and a SIP user agent, which are a plurality of SIP (Session Initiation Protocol, SIP) network servers that provide mobile multimedia services, are called. In addition to the unique core function, each performs SIP protocol processing functions according to different standard specifications of the mobile multimedia subsystem.

This makes it difficult to extend the SIP protocol that is frequently required in mobile multimedia subsystems, as well as the development and extension of SIP user agents and SIP network server CSCFs. In addition, hardware resources for SIP protocol processing are required for all SIP network component devices.

In order to solve this problem, various methods have been proposed. Related patents include the patent of the right holder, Park, Ok-Ok [Patent Name: SIP Protocol Server Device, Publication No. 2001-58123]. As a SIP server that can use the services of the PSTN network, it is to provide a SIP server with a scalability that is not dependent on specific service logic.

In addition, other related patents include the patent of the right holder Lee, Jung-Tae [Patent name: Distributed call processing Internet telephone system based on the SIP protocol and its operation method, Publication No. 2001-104828]. It has a separate server that performs call processing according to the SIP protocol, so that a simple message exchange is required between the terminal and the server to request call setup, and the call processing server performs the call processing of the terminal instead. Make efficient use of resources.

However, this method also involves various difficulties in extending the SIP protocol required by the plurality of SIP network components constituting the mobile multimedia subsystem.

The technical problem to be solved by the present invention is to solve this problem, the SIP network server and the SIP user agent in the mobile communication network to follow the Session Initiation Protocol (SIP) of the standard in common, and the core ( Core protocol function to facilitate independent SIP extension, and to save the hardware resources by avoiding the redundant execution of the SIP processing process and the SIP protocol processing apparatus in the mobile communication network and having the same One mobile multimedia subsystem is provided.

Another object of the present invention is to provide an SIP protocol processing apparatus in a mobile communication network and a mobile multimedia sub-system having the same, which can facilitate development and expansion of a SIP network server and a SIP user agent in a mobile communication network.

The mobile multimedia subsystem in the mobile communication network according to the present invention for achieving the above object, in the mobile multimedia subsystem for providing mobile multimedia services to a plurality of Session Initiation Protocol (SIP) user agent, connected to its own network area A proxy Call State Control Function (CSCF) server that acts as an agent for providing mobile multimedia services on behalf of a SIP user agent; A service CSCF server that processes location registration and release of a user terminal in a home network to which the SIP user agent belongs, and performs call control based on information related to the user terminal; An inquiry CSCF server performing a form hiding and a firewall function between the networks according to an interworking function between networks, and performing call control based on information related to the user terminal; And an SIP protocol processing apparatus for allowing the proxy CSCF server, the service CSCF server, and the inquiry CSCF server to perform their own protocol processing using a single SIP according to the standard specification of the mobile multimedia subsystem, respectively. Characterized in that.

In this case, the SIP protocol processing apparatus may process the call control and location information service of the proxy CSCF server, the service CSCF server, and the inquiry CSCF server by using an SPI event structure including transmission / reception information of an SIP message. In addition, the user agent and each CSCF server, characterized in that it operates independently from each core (CORE) device for delivering the SPI event structure.

In addition, the SIP protocol processing apparatus in a mobile communication network according to another embodiment of the present invention, SIP protocol processing apparatus for performing protocol processing of a system for providing a mobile multimedia service to a plurality of Session Initiation Protocol (SIP) user agents A transmission control unit for transmitting and receiving an SIP message on behalf of each core device in a mobile multimedia subsystem; When the text-based SIP message is received through the transmission control unit, the SIP header and the body of the received message are decoded, and the SIP message requested from each core device. A SIP message processor which encodes and delivers the encoded message to the transmission controller; A SIP protocol processor configured to perform protocol processing on the decoded SIP message and the SIP message requested from each core device using a single SIP according to a standard specification of the mobile multimedia subsystem; And an SIP application block interface unit configured to perform initial setting of each core device and to transmit and receive an SPI event structure between each core device and the SIP protocol processing device.

In this case, the SIP event structure, characterized in that it comprises the type of the SIP message, the main header list of the SIP message and the body information of the SIP message.

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

1 is a schematic network diagram of a mobile multimedia subsystem according to an embodiment of the present invention.

As shown in FIG. 1, the mobile multimedia subsystem 100 includes a SIP user agent 110, which is a mobile user terminal, and a proxy, which is a plurality of SIP network servers that provide mobile multimedia services to the SIP user agent 110. Call State Control Function (CSCF), which is referred to as a call state control function (hereinafter referred to as CSCF 120), serving CSCF 130, and interrogating CSCF 140, which is a home network and a visit It has a network structure.

In detail, first, the SIP user agent 110 is a terminal of a moving user, and performs SIP protocol processing of a mobile multimedia subsystem standard standard to provide a mobile multimedia service to a corresponding service user.

Next, the proxy CSCF 120, which is one of the SIP network servers, serves as a first contact point of the mobile multimedia network, and acts as a substitute for the mobile multimedia service on behalf of the SIP user agent 110 connected to its network area.

The service CSCF 130 processes location registration and release of the user terminal in the home network of the SIP user agent 110, and performs call control based on information related to the user terminal.

The inquiry CSCF 140 performs topology hiding and firewall functions between the networks according to the interworking function and the necessity of the networks, and performs call control based on information related to the user terminal.

From the proxy CSCF 120 in the mobile multimedia subsystem 100 constituting such a structure, the inquiry CSCF 140 needs SIP protocol processing that conforms to the standard of the mobile multimedia subsystem in order to provide mobile multimedia services to the corresponding service user. .

To this end, in the present invention, SIP protocol processing required for a plurality of SIP network servers and SIP user agent 110 to follow the SIP of the standard in common, not only to facilitate SIP extension, but also to overlap the SIP processing process. By avoiding implementation, hardware resources can be saved.

In addition, the embodiment of the present invention through this to facilitate the development and expansion of the SIP network server and SIP user agent in the mobile communication network.

Here, according to an embodiment of the present invention, the accompanying drawings for the SIP protocol processing apparatus for controlling a plurality of SIP network servers and SIP user agent 110 in the mobile multimedia subsystem to follow the SIP of the standard in common Learn more through the following.

Figure 2 is a detailed internal configuration of the SIP protocol processing apparatus according to an embodiment of the present invention.

As shown in FIG. 2, each core functional device in the mobile multimedia subsystem 100 according to an embodiment of the present invention commonly uses the SIP protocol processing device 150, and these core functional devices operate independently of each other. A SIP UA core device 111, a P-CSCF core device 121, an S-CSCF core device 131, and an I-CSCF core device 24 which are SIP network components.

In addition, the SIP protocol processing apparatus 150 commonly used by these core devices includes a transmission control unit 151, a SIP message processing unit 152, a SIP protocol processing unit 153, and a SIP application block interface unit 154.

In detail, first, the SIP UA core device 111 transmits a SIP event 41 to the SIP protocol processing device 150 when a SIP message is requested, and when the SIP message is received, the SIP UA core device 111 is associated with the SIP protocol processing device 151. By receiving the information as a SIP event, it performs the core function of the SIP user agent 110, which is a mobile user terminal.

When the P-CSCF core device 121, the S-CSCF core device 131, and the I-CSCF core device 141 receive the SIP event 41 information from the SIP protocol processing device 150, the received SIP event information is received. By processing the call control and location information service according to the request, and sending a SIP event to the SIP protocol processing device 150 when the SIP message request, the SIP network server proxy CSCF (120), service CSCF (130) and inquiry CSCF (140) Performs a unique core function.

Next, the SIP protocol processing apparatus 150 according to an embodiment of the present invention, first, the transmission control unit 151 is a SIP UA core device 111, P-CSCF core from other SIP network components connected to the network Send and receive SIP messages on behalf of the device 121, the S-CSCF core device 131 and the I-CSCF core device 141.

When the text message-based SIP message is received from the transmission controller 151, the SIP message processor 152 decodes the SIP header and the body of the received message, and performs an IP network component. The SIP message requested from the in-core devices 111, 121, 131, and 141 is encoded and transmitted to the transmission control unit 151.

The SIP protocol processing unit 153 transfers the decoded SIP message received from the SIP message processing unit 152 and the SIP message requested from each core device 111, 121, 131, and 141 according to the standard specification of the mobile multimedia subsystem. Implement and process

The SIP application block interface unit 154 performs initial settings of the core devices 111, 121, 131, and 141, and initially sets the core function devices 111, 121, 131, and 141 and the SIP protocol processing device 150. SIP events are sent and received via inter-process communication (IPC).

In this case, the SIP event 41 is a structure representing a SIP message request and a SIP message reception event, and includes a type of the SIP message, a main header list of the SIP message, and SIP message body information.

As described above, the SIP protocol processing apparatus and the mobile multimedia subsystem having the same in a mobile communication network according to an embodiment of the present invention, a plurality of SIP network servers and SIP user agents to follow the SIP of the standard in common In addition, by allowing core functions to be performed independently, it not only facilitates SIP extension, but also saves hardware resources by avoiding redundant execution of SIP processing processes.

Here, an initial setting process of each core device 111, 121, 131, and 141 performed on the SIP application block interface unit 154 will be described with reference to the accompanying drawings.

3 is a flowchart sequentially illustrating each core device initialization process of an SIP protocol processing device according to an embodiment of the present invention, and shows an initial setup process of a SIP protocol processing device, an S-CSCF core device, and an inquiry CSCF core device. It is.

The SIPB 60, which is a common SIP protocol processing apparatus shown in FIG. 3, is a device having an IP address of 129.254.214.167 in a home1.net network, and the S-CSCF1 70, which is an S-CSCF core device, is first executed at the first execution. The I Am Ready message is transmitted to the SIPB 60 (S701), at which time it transmits its identifier information.

At this time, in the embodiment of the present invention, the SIPB 60 is described as a network device having a specific IP address, but the present invention is not limited thereto and may be a device having a different IP address.

Thereafter, the SIP application block interface unit of the SIPB 60 checks and stores the identifier of the S-CSCF1 70 in the I Am Ready message received from the S-CSCF1 70, and then stores the S-CSCF1 core device 70. Initial setting is performed (S601).

Subsequently, the SIP application block interface unit of the SIPB 60 sends an S-CSCF1 (OK) message including an IP address, a transport port, and SIP Uniform Resource Identifier (URI) information, which is an SIP network component identifier of the S-CSCF1 70. 70), and the S-CSCF1 70 registers the service with the home network to provide the mobile multimedia service based on the received OK response message (S703).

On the other hand, the I-CSCF1 device 80, which is an I-CSCF core device, transmits an I Am Ready message to the SIPB 60 at the first execution of the initialization process (S802), and also transmits its identifier information to the message. .

Thereafter, the SIP application block interface unit of the SIPB 60 checks and stores the identifier of the I-CSCF1 in the message received from the I-CSCF1 80 and then performs initialization setting for the I-CSCF core device (S802). .

Subsequently, the SIP application block interface unit of the SIPB 60 transmits an OK response message including the IP address, the transmission port, and the SIP URI information, which are the SIP network component identifiers of the I-CSCF1, to the I-CSCF1 80 (S803). Upon receiving this, the I-CSCF1 80 registers a service with a home network and a DNS server to provide a mobile multimedia service based on an OK response message (S803).

As such, after performing service registration, the S-CSCF1 70 and I-CSCF1 80 transmit and receive SIP events through the SIP protocol processing apparatus 150 in common, and at the same time, service CSCF and inquiry CSCF that are SIP network servers. Perform core functions.

The drawings and detailed description of the invention are exemplary only, and are used for the purpose of illustrating the invention only, and are not intended to be limiting or to limit the scope of the invention described in the claims. Therefore, those skilled in the art will understand that various modifications and equivalent other embodiments are possible from this. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

In the mobile communication network according to the present invention, the SIP protocol processing apparatus and the mobile multimedia sub-system including the same enable a plurality of SIP network server CSCFs and SIP user agents to use a SIP protocol processing apparatus of a standard. By independently performing the core functions, the core devices of the SIP network server CSCF and the SIP user agent can be easily developed and expanded, the SIP protocol can be easily extended, and the redundant execution of the SIP protocol processing process can be prevented. There is an effect of saving hardware resources.

1 is a schematic network diagram of a mobile multimedia subsystem according to an embodiment of the present invention.

Figure 2 is a detailed internal configuration of the SIP protocol processing apparatus according to an embodiment of the present invention.

3 is a flowchart sequentially illustrating an initialization process of an SIP protocol processing apparatus according to an embodiment of the present invention.

※ Explanation of code for main part of drawing ※

100: Moving Multimedia Subsystem

110: SIP user agent 111: SIP UA core device

120: proxy CSCF 121: P-CSCF core device

130: service CSCF 131: S-CSCF core device

140: lookup CSCF 141: I-CSCF core device

150: SIP protocol processing unit

151: transmission control unit 152: SIP message processing unit

153: SIP protocol processing unit 154: SIP application block interface unit

Claims (9)

A mobile multimedia subsystem for providing mobile multimedia services to multiple Session Initiation Protocol (SIP) user agents, A proxy Call State Control Function (CSCF) server that acts as an agent for providing mobile multimedia services on behalf of an SIP user agent connected to its network area; A service CSCF server that processes location registration and release of a user terminal in a home network to which the SIP user agent belongs, and performs call control based on information related to the user terminal; An inquiry CSCF server performing a form hiding and a firewall function between the networks according to an interworking function between networks, and performing call control based on information related to the user terminal; And SIP protocol processing device for allowing the proxy CSCF server, the service CSCF server, and the inquiry CSCF server to perform their own protocol processing using a single SIP according to the standard specification of the mobile multimedia subsystem, respectively. And a mobile multimedia subsystem. According to claim 1, The SIP protocol processing apparatus, And a call control and location information service of the proxy CSCF server, the service CSCF server, and the inquiry CSCF server, by using an SPI event structure including transmission / reception information of an SIP message. The method of claim 2, The SIP protocol processing apparatus, A mobile multimedia subsystem, operating independently of each core device delivering the SIP event structure to the user agent and each CSCF server. The method of claim 3, wherein The SIP protocol processing apparatus, A transmission controller configured to transmit and receive an SIP message on behalf of each of the core devices; When a text-based SIP message is received through the transmission control unit, a SIP header and a body of the received message are decoded, and an SIP requested from each core device is decoded. A SIP message processor which encodes a message and delivers the message to the transmission controller; A SIP protocol processor configured to perform protocol processing on the decoded SIP message and the SIP message requested from each core device using a single SIP according to a standard specification of the mobile multimedia subsystem; And SIP application block interface unit performing initial setting of each core device and allowing the SPI event structure to be transmitted and received between each core device and the SIP protocol processing device. And a mobile multimedia subsystem. The method of claim 4, wherein The SIP application block interface unit, And when identifier information is received from each CSCF server, initial setting of each core device according to the received identifier information. The method of claim 5, Each CSCF server, When a response message including an IP address, a transmission port, and a Uniform Resource Identifier (URI) information is received from the SIP application block interface unit, a registration process for providing a mobile multimedia service is performed according to the received response message. Moving multimedia subsystem. The method of claim 2, The SPI event structure is And a type of the SIP message, a main header list of the SIP message, and body information of the SIP message. In the SIP protocol processing apparatus for performing protocol processing of a system for providing mobile multimedia services to a plurality of Session Initiation Protocol (SIP) user agents, A transmission controller for transmitting and receiving an SIP message on behalf of each core device in the mobile multimedia subsystem; When the text-based SIP message is received through the transmission control unit, the SIP header and the body of the received message are decoded, and the SIP message requested from each core device. A SIP message processor which encodes and delivers the encoded message to the transmission controller; A SIP protocol processor configured to perform protocol processing on the decoded SIP message and the SIP message requested from each core device using a single SIP according to a standard specification of the mobile multimedia subsystem; And SIP application block interface unit performing initial setting of each core device and allowing an SPI event structure to be transmitted and received between each core device and the SIP protocol processing device SIP protocol processing apparatus comprising a. The method of claim 8, The SPI event structure is And a type of the SIP message, a main header list of the SIP message, and body information of the SIP message.