KR101501849B1 - Small ims core system - Google Patents

Abstract

The present invention relates to a small capacity IMS Core system applicable to group customers.
In the present invention, a small-capacity IMS Core allows a group customer (enterprise, institution, school, etc.) using the IMS service to operate a POTS system and an Internet telephone system in parallel, (IMS) terminals such as mobile phones and IMS terminals, including a main control unit (MCU) for simply providing functions necessary for a group customer among the functions of the IMS structure, a main control unit A PSTN processing unit (LIU) used to extend the physical port of a telephone (POTS), a SIP gateway (SIP gateway) converting a standard SIP message into an IMS message, and a wireless terminal such as a wireless IMS terminal / And an FMC controller (FMC Controller) for use in the environment. This system is characterized in that each unit (UNIT) includes a Virtual Ethernet backplane based on IP communication so that information can be exchanged at high speed.

Description

Small IMS CORE System {SMALL IMS CORE SYSTEM}

The present invention relates to a small capacity IMS Core system applicable to collective customers.

In general, IMS (IP Multi-Media Subsystem) is a service platform that provides multimedia services such as voice, audio, video and data based on Internet Protocol (IP). Has been proposed in 3GPP (Third Generation Partnership Project) to support multimedia service in 3G mobile communication network, but it is being widely adopted by IPTV, cable telephone service provider and the like.

3GPP is a collaborative research project between mobile telecommunication organizations conducted within the scope of IMT-2000 project conducted by the International Telecommunication Union (ITU). It is aimed at deriving the third generation mobile telecommunication system standard applicable globally. The goal is to standardize the radio, core network and service architecture based on the GSM standard used in European countries. 3GPP2 (3rd Generation Partnership Project 2) is a standardization project supporting 3GPP, and 3GPP2 has standardized 3rd generation technology based on IS-95 (CDMA) known as CDMA2000.

Since the establishment of 3GPP, the standardization work has been carried out in the unit of Release. In the 'Release 5' in 2002, IMS was first introduced. IMS is not a communication standard for exchanging information but a service architecture for providing various multimedia services on one platform. SIP and Diameter protocols are used for information exchange between actual systems.

Since introducing IMS in 3GPP, we have been able to offer 'NGN', 'TISPAN' and 'PacketCable 2.0' based on IMS in 3GPP2, ITI-T, ETSI, ATIS, MSF and CableLabs IMS is the only standard commonly used in all areas of wired and wireless communications and broadcasting, as it defines the service architecture and adds requirements to each service.

Currently, IMS is adopted in mobile phone service network and is used to provide multimedia service and internet service in mobile communication environment. From the standpoint of a company, it is also a burden to introduce a new IMS terminal by removing existing communication infrastructure that has already invested a great deal of money, and it is also costly to newly install a LAN cable in a factory or a conference room without IP environment . Therefore, a new type of communication system needs to be developed for a company that intends to introduce IMS service gradually while maximizing the existing communication infrastructure.

In order to solve the above problems, the small capacity IMS Core system according to the present invention is aimed at making it suitable for IMS solution for enterprises with less than 1,000 employees or small multimedia service providers.

Another object of the present invention is to provide an IMS terminal, which is interposed between an IMS terminal and a CSCF (Call Session Control Function) in cooperation with an IMS service of a telecommunication carrier, provides a CSCF role corresponding to an IMS terminal and an IMS terminal function corresponding to a CSCF .

Another object of the present invention is to provide a mobile communication system and a mobile communication system in which terminals used in a company such as a landline telephone and an SIP phone are interworked by using a gateway and interworking with an external telephone is performed by a PSTN Extension phone, or multimedia service subscriber.

Another object of the present invention is to provide a SIP-Gateway function for interworking with a SIP-based Internet telephone service, thereby linking a SIP-based soft switch and a standard SIP phone.

It is still another object of the present invention to provide a function of a private branch exchange of an enterprise by selecting an IMS or a PSTN to make an incoming / outgoing call.

Another object of the present invention is to provide a mutual backup function of a telephone service to bypass the PSTN in case of IMS service failure and bypass the IMS in case of PSTN failure.

It is another object of the present invention to provide a free call / SMS service between extension terminals by assigning an extension number to an external IMS terminal or SIP terminal.

It is another object of the present invention to provide a protocol conversion function between SIP and IMS for use of a conventional SIP terminal by supporting a standard SIP terminal.

It is another object of the present invention to provide a voice roaming function between a wireless LAN network and a 3G / 4G network by supporting the Mobile-VoIP and using the FMC-Controller function.

According to another aspect of the present invention, there is provided a terminal device using an IMS service interlocked with an IMS service provider network including an Internet telephone and an IPTV, wherein an IMS Core including a CSCF, an MGW, and an ABGF is provided, A PSTN processing unit (LIU) including a port for interworking with a POTS system including T1 / E1 PRI, FXO, and FXS, including a main control unit (MCU) A SIP gateway including a SIP terminal including a SIP phone, a soft phone, a WiFi phone, and a DECT phone and a protocol conversion function for interworking with an IMS device without changing firmware; And an FMC controller including an IP address synchronization function of a mobile terminal including a roaming function for using an IMS service in a mobile environment.

Accordingly, in a preferred embodiment of the present invention, a unit including the main control unit, the PSTN processing unit, the SIP gateway, and the FMC controller is provided, IP communication is performed at high speed between each unit, Control Bus for control of unit operation; An IO interface for providing Sub-Rack information and slot address information as position information combined with each unit; 10/100/1000 Mbps Ethernet speed and Half / Full Duplex Mode are automatically detected for each slot, and a backplane provided for information exchange in a non-blocking manner between each unit including a main controller, a PSTN processor, a SIP gateway and an FMC controller And a control unit.

The small-capacity IMS Core system according to the present invention configured as described above is suitable for building an IMS solution for a group customer (enterprise, institution, school, etc.) having a well-established communication infrastructure such as a small company or a small multimedia service provider .

Another advantage of the present invention is that, when an IMS service is to be introduced, the introduction cost can be minimized because it is possible to partially or completely introduce the existing system while making maximum use of the existing system.

Further, another effect of the present invention is to provide the PSTN backup and FMC functions not provided by the IMS service, thereby enhancing the reliability and stability of the communication service.

Further, another effect of the present invention can smoothly introduce an application solution capable of enhancing work efficiency such as mobile office, smart work, and UC in the future.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a structural example of an IMS that can be practiced in the present invention. FIG.
FIG. 2 is an exemplary view of the functions of the IMS Core system according to the present invention.
3 is an exemplary diagram illustrating a connection configuration to an IMS Core system according to the present invention.
FIG. 4 is an exemplary diagram illustrating a combined configuration in an IMS Core system according to the present invention.
5 is an illustration of an embodiment of an IMS Core system in accordance with the present invention.
6 is a diagram illustrating an example of a unit configuration of an IMS Core system according to the present invention.
7 is an exemplary diagram illustrating a hierarchical structure of a main control unit of an IMS Core system according to the present invention.
8 is a diagram illustrating an example of a hierarchical structure of a PSTN processor of an IMS Core system according to the present invention.
9 is an exemplary diagram illustrating a hierarchical structure of a SIP gateway of the IMS Core system according to the present invention.
10 is an exemplary diagram illustrating a hierarchical structure of an FMC controller of an IMS Core system according to the present invention.
11 is a diagram illustrating an example of a hierarchical structure of a main language unit mainly showing functions of an IMS Core system according to the present invention.
FIG. 12 is an exemplary diagram illustrating a hierarchical structure of a PSTN processing unit mainly showing functions of an IMS Core system according to the present invention.
FIG. 13 is a diagram illustrating an example of a hierarchical structure of a SIP gateway based on the functions of the IMS Core system according to the present invention.
FIG. 14 is an exemplary diagram illustrating a hierarchical structure of an FMC controller based on functions of an IMS Core system according to the present invention.

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

The small capacity IMS CORE system 100 according to the present invention includes a main control unit 110, a PSTN processing unit 120, a LIU, a SIP gateway 130, a FMC A controller 140 (FMC Controller), and the like.

In this small-capacity IMS Core system 100, a plurality of processing units and terminals having a control configuration are connected by IP means, and a main control unit 110 is provided for communication configuration and control of these terminals. That is, a terminal device using an IMS service in cooperation with an IMS service provider network including Internet telephony and IPTV, includes a main controller 110 (MCU) having IMS core functions including CSCF, MGW, and ABGF and IMS terminal functions . Other automatic settings are used to set the unit status of each terminal and to process and control information about the firmware and the like.

That is, a main control unit (MCU) 110 manages a POTS system and an Internet telephone system in parallel by a group customer (enterprise, institution, school, etc.) using the IMS service, IMS terminals such as mobile phones, smart phones, etc. to be used in combination with IMS terminals, and simply provide the functions necessary for the group customers among the functions of the IMS structure.

(PSTN), a line interface unit (LIU), a SIP phone, and the like, which are used to extend the physical port of a wire telephone, including a port for interworking with a POTS system including T1 / E1 PRI, FXO, A SIP gateway 130 (SIP gateway) 130 for converting a standard SIP message into an IMS message including a SIP terminal including a soft phone, a WiFi phone, and a DECT phone and a protocol conversion function for interworking with an IMS device without changing firmware, And an FMC controller (FMC Controller) 140 including a roaming function for using the IMS service and including an IP address synchronization function of the mobile terminal. That is, the FMC controller supports the use of a wireless terminal such as a wireless IMS terminal / smart phone as an internal terminal in a mobile environment.

In addition, a unit and a unit interface including the main control unit, the PSTN processing unit, the SIP gateway, and the FMC controller are provided, and IP communication is performed between each unit at high speed. A control bus for detecting the coupling and disconnection of each unit and controlling the operation of the unit, an IO interface for providing sub-rack information and slot address information as position information combined with each unit, and a 10 / 100 / 1000Mbps Ethernet speed and Half / Full Duplex Mode are automatically detected for each slot, and a backplane (Back) provided for information exchange by non-blocking method between each unit including main controller, PSTN processor, SIP gateway and FMC controller -Plane) and the like. In other words, the backplane is based on IP communication so that each unit can exchange information at a high speed, or it is implemented with a Virtual Ethernet backplane.

FIG. 1 is a structural view of an IMS implemented through a small capacity IMS Core system 100 according to the present invention, and FIG. 2 is a simplified diagram of an IMS function by a small capacity IMS Core system 100 according to the present invention.

FIG. 1 is a block diagram of the IMS system according to an embodiment of the present invention. Referring to FIG.

- IM-SSP, OSA-SCS, Service Capability: Application Server providing service while communicating with S-CSCF.

- Home Subscriber Server (HSS): Provides subscriber information to an entity that performs call processing directly in the IMS network. It performs subscriber authentication, authorization function, and physical location of the subscriber.

- Call Session Control Function (CSCF): Handles the subscriber's multimedia call (SIP Server or Proxy role). Depending on the type of service, it can perform SIP routing with AS or non-SIP service processing for TDM-based users.

- MRF (Media Resource Function): Provides functions such as Voice manipulation, Tone and Announcement transmission such as Voice Stream Mixing. It can be divided into MRFC (Controller) and MRFP (Processor).

- BGCF (Break Gateway Control Function): SIP Server providing routing service based on phone book. Use only when calling from IMS to CS network like PSTN.

- Media Gateway Controller Function (MGCF): Performs call control protocol conversion between SIP and ISUP and interworks with SGW using Streaming Control Transmission Protocol (SCTP).

-SGW (Signaling Gateway): Linked with Signaling Plane of CS network. Conversion between SCTP (IP Protocol) and MTP (Message Transfer Part, SS7 Protocol).

- MGW (Media Gateway): Converts between real-time transport protocol (RTP) and PCM in conjunction with Media Plane of CS network.

- Policy Decision Function (PDF): Performs policy control and bandwidth management.

- Service Policy Decision Function (SPDF): Performs PDF function in the wired network. Added by TISPAN.

- CLF (Connectivity session location and repository function): Dynamic Database that stores user's profile. The number of allowed concurrent sessions, the media type, and location information.

- Network Access Configuration Function (NACF): Provides Enhanced DHCP Server function.

- A-RACF (Access-Resource and Admission Control Function): Provides the function to calculate the status of Access network by collecting CLF data. Determine whether to allow new sessions based on this number.

- C-RACF (Core-Resource and Admission Control Function): Provides RACF function for Core network.

- Gateway GPRS Support Node (GGSN): GPRS backbone network and external packet data network. Conversion between IP address and GSM address.

- Access Board Gateway Function (ABGF): Provides firewall and NAT Traversal function.

As shown in FIG. 2, the small-capacity IMS Core is interposed between the IMS terminal and the CSCF (Call Session Control Function) in cooperation with the IMS service of the main communication service provider. The CSMSF function corresponds to the IMS terminal, Lt; / RTI > Terminals used in companies such as landline phones and SIP phones are connected to each other by using a gateway. In addition, when the IMS service of the telecommunication carrier is not used, it is also possible to apply the IMS service only to the extension phone or the multimedia service subscriber while interworking with the external phone using the PSTN.

The small capacity IMS Core system of the present invention can be used in a country that does not provide an IMS service because it has a self-call processing function such as a CSCF and an MGW in addition to being used for an enterprise IMS service. SIP-based soft switch and standard SIP phone are also linked by providing SIP-Gateway function for interworking with SIP-based Internet telephone service.

The small-capacity IMS Core system 100 according to the present invention is provided with a unit such as an SCU, a main controller, a PSTN processor, a SIP gateway, an FMC controller, a unit interface, etc. in a backplane 150 And a plurality of terminals having respective functions are connected through these units to operate the IMS system. The small capacity IMS Core system 100 according to the present invention will be described in more detail below using the preferred embodiments of the connection configuration shown in FIGS.

FIG. 3 is a diagram illustrating a connection configuration for an IMS Core system according to the present invention, FIG. 4 is an exemplary view illustrating a combination configuration in an IMS Core system according to the present invention, and FIG. And FIG. 6 is an exemplary view of a unit configuration of an IMS Core system according to the present invention.

The small capacity IMS Core system 100 according to the present invention, which is provided as shown in FIGS. 1 and 2, includes an SCU, a main controller, a PSTN processor, a SIP gateway, an FMC A controller, etc., a unit interface, and the like, and a plurality of terminals having respective functions are connected through these units to operate the IMS system.

The back-plane of the IMS Core system supports a network port connecting an external network switch and a plurality of IP terminals connected to the backplane. The IP terminal is exemplified by a plurality of terminals connected through a plurality of ports such as a main controller, a PSTN processor, a SIP gateway, and an FMC controller, and various aspects are connected as illustrated in FIGS. 1 and 2, for example. The IP terminals are connected to the main controller, the PSTN processor, the SIP gateway, and the FMC controller. The main controller, the PSTN processor, the SIP gateway, and the FMC controller are connected to the internal IP addresses.

Therefore, the IP terminal using the internal IP address is directly connected to the backplane through the private IP, not via the WAN port of the main control unit, and performs IP communication with the main control unit, the PSTN processing unit, the SIP gateway, and the FMC controller.

Two private IP addresses are assigned to each unit of the small capacity IMS Core system. For example, one hidden private IP address and one public IP address. One hidden private IP address is used to configure a virtual Ethernet network between each unit. One public IP address is assigned to each unit via an external network connection port of the backplane. It is designed to be used for direct connection.

In addition, when each unit is inserted into a slot of a small capacity IMS Core system and booting is completed, the slot information of the slot is read from the backplane, and an automatic opening process is performed to automatically set the IP address of the slot. To configure the network.

In addition, after each unit has a network configuration, it is connected to the main control unit and compares the firmware version stored in the main control unit with the firmware version thereof. If the compared firmware version is different, the system automatically upgrades to the firmware stored in the main part. Also, the detail configuration information of the unit itself is read from the database of the main part database, thereby performing a procedure of automatically setting the function To implement the automatic upgrade method.

After each unit is inserted and executed in SLOT of small capacity IMS Core system, automatic operation and automatic upgrade method are implemented, so that operation of each device is automatically performed, and management becomes easier.

A specific configuration for the above operation will be described as a preferable example of FIG. 3 to FIG. 3 is a schematic diagram of a small capacity IMS Core. The small capacity IMS Core system of the present invention includes a main control unit 110 for simply providing functions necessary for a group customer among functions of the IMS structure, a PSTN processing unit 120 for expanding a physical port of a PSTS A SIP gateway 130 for converting a standard SIP message into an IMS message, and an FMC controller 140 for supporting a wireless terminal such as a wireless IMS terminal / smart phone to use in a mobile environment. In particular, a small capacity IMS Core system 100 including a backplane 150 based on an IP communication for exchanging information at high speed is provided. This backplane 150 is implemented with Virtual Ethernet. In addition, information is exchanged between each unit through the backplane at a speed of 10/100 / 1000Mbps Ethernet, so that signal transmission between each unit is stably performed.

4 is an exemplary view showing a combined configuration of the configurations of the small capacity IMS Core system 100. As shown in FIG. It is implemented as a 19-inch sub-rack system that can be installed in a standard communication rack to provide power redundancy (AC, DC, Relay). In other words, AC110 ~ 230V power is input and supplied to DC. In case of high DC voltage, DC12V and DC5V suitable for internal configurations are supplied.

The Sub-Rack system provides a slot with 14 units. For example, the 0th Slot is equipped with a signaling control unit (SCU) that provides a function to connect an external network port to the backplane. ~ Slot # 2 is equipped with two main control units. The remaining 11 option slots are equipped with a plurality of PSTN controllers, SIP gateways, and FMC controllers according to customer configuration requirements. If more than 11 option slots are needed, multiple sub-racks can be connected using a system expansion port of the signal control unit as a single system.

FIG. 5 is an illustrative example of an embodiment of this small capacity IMS Core system 100. FIG. It is possible to construct a sub-rack system of 19 inch size with various sub-rack size, and the unit used in each sub-rack system is the same Do. FIG. 5 illustrates the 'System Sub-Rack' type, the 'Half-Rack' type, and the 'Mini-Rack' type. The 'System Sub-Rack' , And power redundancy. And in the case of 14 Slot support, 4 system sub-racks are connected by bus to construct 56 Slots. This 'System Sub-Rack' type is useful for medium-sized companies or enterprises with a large number of PSTN ports.

The 'Half-Rack' type can be equipped with a 19-inch standard rack, 4U type, and supports power redundancy. 5 Slot support, mid - sized companies in All - IP environments, or small and medium - sized businesses with a small number of PSTN ports. In addition, 'Mini-Rack' type 19-inch standard rack mountable, 2U type, 2 Slot support is available. It is used by SMEs that do not need CPU redundancy. As such, it is used according to the usage environment of the user and the user.

6 is an example of a unit shape in the small-capacity IMS Core system 100. FIG. According to the function of each unit, various interfaces for physically connecting to the outside are provided, and various external terminals are connected and connected. For example, the SCU unit is equipped with AC PWR, DC PWR, Restart, and LAN1 and LAN2 for external connection. MCU units are equipped with POWER, REG., Restart, CON, WAN and USB. The FMC unit is equipped with POWER, REG., Restart, CON, WAN (2), USB, etc. The SIP-GW (SIP Gateway) unit is equipped with POWER, REG. And the like. LIU-E, LIU-S, and LIU-2S are provided with respect to the PSTN processor, and LIU-E units are provided with units such as POWER, REG., Restart, CON, WAN, ER RPI and so on. LIU-S units are equipped with POWER, REG., Restart, CON, WAN, LINE 1 ~ LINE 8, WAN, Tel1 to Tel8 and the like, and the LIU-2S unit is provided with ports 1 to 16 for POWER, REG., Restart, CON, WAN, and Tel.

Next, the main constituent units of the small capacity IMS Core system 100 will be described.

First, the main control unit 110 sets forth below using the preferred hierarchical structure diagram of FIG. The main control unit 110 performs an IMS function through a call session control function (CSCF), an access board gateway function (ABGF) and a media gateway (MGW) Controller) function. And a mainboard that is implemented on a single board.

In the case of the MGW (Media Gateway) function, the main controller selects the FXO, the FXS, and the E1 / T1 PRI interface according to the standard of the wire telephone, and the hardware is configured to be replaced by the module unit.

The main control unit is provided with a function of ensuring voice communication quality by determining a network bandwidth and a packet processing priority usable for each type of traffic and port for network traffic transmitted to the main control unit via the backplane .

In addition, the main control unit checks the network traffic received through the WAN port through the Internet and the network, detects the detected traffic of the harmful attack packet to the IMS Core, and transmits the detected packet determined as the harmful traffic And the function of interrupting the connection of the IP terminal. Therefore, it is possible to use securely from the connection of the harmful terminal.

Next, the main control unit recognizes the network traffic received on the WAN port through the Internet, the network, or the like, and recognizes the packet attempting to steal the IMS service against the unauthorized illegal connection packet, And to block the connection of the IP terminal transmitting the packet.

In addition, two WAN ports are configured in the main control unit in an active / standby mode. Thus, if a network cable or a network switch connected to the Active WAN port or the Active WAN port fails, and the Internet connection is not established, a network port redundancy function of instantly connecting to the Internet through a stand-by WAN port is provided.

When the main control unit is duplicated in the active / standby mode and the active main control unit fails, the main control unit is changed to the active mode immediately and the existing active control unit is changed to the standby mode. The function of the main control unit can be further secured.

In the main control part duplication function, all setting changes, terminal registration information, and call processing log generated in the active main control part are transmitted to the stand-by main processing part in real time so that active / standby switching is safely performed in real time And the duplication function of the main control unit is provided.

As shown in FIG. 7, the main control unit is implemented as a part or all of the functions used for accepting group customers among the functions of the IMS structure, and is distributed and run on a plurality of CPU cores. The network ports of the main control section are divided into a WAN port and a LAN port, and voice / data packets between each network port and the CPU core are exchanged in an IP manner through a multi-layer bus. In the Multi Layer Bus, the security management function and the QoS / congestion management function of the main language part are performed in the OSI Network Layer or Data Link Layer according to the command of the upper application core. The functions of the application software running in each core depend on the definition of each function of the IMS structure. The PSTN ports connected to the main controller are connected to the DSP Core via TSI (TDM bus), SLIC is analog terminal, SLAQ is analog trunk line, and T1 / E1 framer is a module used to connect digital T1 / E1 line. CODEC Is a device for converting an analog signal to a digital PCM.

Hereinafter, the PSTN processing unit 120 will be described with reference to FIG.

First, the PSTN processing unit 120 of the present invention provides an option board corresponding to each water report corresponding to the characteristics of various PSTN data reports to which exchanges including an analog telephone, a telephone exchange, a public telephone exchange, an ISDN exchange, etc. are connected . The PSTN processor unit automatically recognizes the type of the option board mounted on the PSTN processor, thereby automatically changing the setting screen and the function of the PSTN processor.

In the PSTN processor, the analog terminal connected to the PSTN port is recognized as an IMS terminal by the CSCF of the IMS service provider by interlocking the IMS service number with each PSTN port, thereby enabling the analog terminal to receive the same IMS service as the IMS dedicated terminal. Processing unit function.

In addition, a PSTN processing unit function is provided to connect a CO line of a private branch exchange or a key telephone system to a PSTN analog port of the PSTN processing unit to support analog / digital terminals connected to the device to share one IMS service number.

And a PSTN processing unit for connecting an ISDN port of a private branch exchange or a key telephone system to an ISDN digital port of the PSTN processing unit to support analog / digital terminals connected to the device to share a plurality of IMS service numbers.

As described above, various IMS services are provided even for an analog terminal or a digital terminal by using an exchange, a key phone, and the like connected to each port of the PSTN processing unit, and thus, a stable connection service is provided to terminals of other environments.

And a PSTN processing unit functioning to connect a public switching center of a telephone station to the PSTN port of the PSTN processing unit and to enable various terminals connected to the IMS Core to directly place a call to the PSTN network and directly receive an incoming call from the PSTN network will be. Thus, even in the case of a terminal connected to a public exchange, a stable service is provided.

In addition, when the connection between the IMS Core and the IMS service provider's call processing device (CSCF) is broken due to problems such as Internet failure, network failure, etc., it provides a backup function that automatically forwards the outgoing call of the terminal connected to the IMS Core to the PSTN network do. Therefore, there is a situation in which the connection is disconnected, so that it is possible to prevent the use thereof.

8 shows a hierarchical structure of the PSTN processing unit 120 as a specific example of the PSTN processing unit. The PSTN processor implements a part or all of the functions required for the PSTN interworking among the functions of the IMS structure, and is distributed and run on several CPU cores. The network port of the PSTN processing unit is connected to the backbone plane, and the voice packet and the control message between the network port and the CPU core are exchanged by the IP method through the multi-layer bus. In Multi Layer Bus, security management function of main control part is performed in OSI Network Layer or Data Link Layer according to the command of higher application core. The functions of the application software running in each core depend on the definition of each function of the IMS structure. The PSTN ports connected to the PSTN processor are connected to the DSP core via the TSI (TDM bus), SLIC is an analog terminal, SLAQ is an analog trunk line, and T1 / E1 framer is a module used to connect a digital T1 / E1 line. Is a device for converting an analog signal to a digital PCM.

Hereinafter, the SIP gateway 130 will be described with reference to FIG.

The SIP gateway receives a SIP message from a terminal using a SIP protocol, such as a SIP phone, a soft phone, a WiFi phone, or a DECT phone, converts the SIP message into an IMS message and transmits the IMS message to the subject part, And transmits the SIP gateway function to the SIP terminal. Therefore, the users who use the SIP terminal also use the IMS service without inconvenience.

In the SIP gateway, one SIP terminal or a plurality of SIP terminals are linked to one IMS service number, thereby supporting a plurality of SIP terminals to share one IMS service number.

In addition, the SIP gateway supports the configuration using the head office / the ground for the IP-PBX or the media gateway using the SIP protocol, and provides a function for supporting direct communication with the exchanger extension number among the respective devices. Therefore, IP-PBX, media gateway, etc., can be easily used by the extension method without inconvenience to terminals such as head office / branch office.

9 shows a hierarchical structure of the SIP gateway 130. As shown in FIG. The SIP gateway provides the IP-PBX function in correspondence with the standard SIP terminal and is implemented to provide the function of the IMS terminal in correspondence with the CSCF of the main control unit 110, and it is distributed and run on several CPU cores. The network port of the SIP gateway is divided into a WAN port and a LAN port. Data packets between each network port and the CPU core are exchanged in an IP manner through a system bus. The standard SIP terminal connects to the WAN port or the LAN port according to the location where the terminal is installed and is registered in the register server of the Application Core. The call processing control and the RTP packet transmission are performed through the proxy. In order to communicate with the IMS terminal or use the IMS service, a standard SIP message is converted into an IMS message through an IMS Emulation module, and a predefined IMS terminal number is assigned to the IMS terminal and interworked with the CSCF of the main processing unit 110. The communication between the SIP terminals connected to the SIP gateway communicates with the SIP method using the private telephone number (extension number) assigned by the SIP gateway.

Hereinafter, the FMC controller 140 will be described with reference to FIG.

In the FMC controller, when the IMS service is used in a mobile environment of a terminal such as a WiFi phone, a DECT phone, or a smart phone (soft phone), the terminal information DB is updated by tracking the change of the IP address and the port number of the terminal in real time So that the connection of the terminals is smoothly operated. In particular, when a call is made using a communication application for communication (soft phone application, a phone application) for a phone installed in a corresponding terminal such as a smart phone, a communication application for communication (such as a soft phone application, ) Is automatically activated by the FMC controller. Accordingly, both terminals installed with the application smoothly make telephone calls with each other. In this case, since each of the corresponding terminals tracks and updates the IP address and port number in the FMC controller, The call will be provided.

In addition, the FMC controller provides an SBC (Session Boarder Controller) function that supports call processing by maintaining a session even when mobile terminals access the FMC controller via a plurality of IP routers.

10 shows a hierarchical structure of the FMC control unit 140. As shown in FIG. The FMC controller is implemented to provide the IMS terminal function in response to the CSCF of the main control unit 110 and to provide the CSCF function corresponding to the IMS terminal used in the mobile communication environment. The network port of the FMC control unit is divided into a WAN port and a LAN port. Data packets between each network port and the CPU core are exchanged in the IP system through the system bus. The IMS terminal is connected to the CSCF of the Application Core by connecting to the WAN port, and the LAN port is used by the FMC controller to communicate with the main control unit 110. The FMC Server module provides the roaming function between the wireless APs and the 3G / 4G mobile communication data network and the wireless AP to use the IMS terminal on the move. (Soft phone, telephone call application, etc.) every time a call is received at the receiving terminal, the IMS terminal is implemented in the TCP mode by the IMS terminal And transmits an activation message such as a softphone application. Communication between the IMS terminals connected to the FMC controller uses the IMS service number, so the IMS service provider's CSCF and AS (Application Server) should be used.

In addition, it is preferable that the main controller, the PSTN processor, the SIP gateway, and the FMC controller are all composed of a plurality of CPU cores. In addition, the function is assigned to each Core, and the software is modularized for each function, and communication is performed by a message exchange method between each software module. Thus, it is possible to flexibly cope with the user's use by enhancing convenience of function modification and additional work, enabling each function to be dispersed in separate independent hardware so that it can be fully used even when the user and the user's use scale is enlarged.

According to the small capacity IMS Core system 100 according to the present invention thus constructed, an IMS service is constructed in a group of customers (enterprise, institution, school, etc.) such as an enterprise with less than 1,000 employees and a small-scale multimedia service provider, It is advantageous to construct an extension telephone or a multimedia system for each terminal even in the connection of telephone through IMS phone, SIP phone, PSTN, and mobile communication environment.

The core functions of the small capacity IMS Core system of the present invention having the above configuration are shown in FIG. 3 to FIG. 10 and the functions of the main controller, the PSTN processor, the SIP gateway, and the FMC controller shown in FIG. 11 to FIG. Will be described with reference to the drawings.

The user can preset the IMS or PSTN in the main control unit so that the user can make an incoming / outgoing call by selecting IMS or PSTN. 11, if the IMS service call signal (call, Call) is input through the external service provider (for example, the CSCF of the IMS service provider), the main control unit passes the network security & QoS, In an IMS terminal emulation with an IMS number (e.g., a telephone number) corresponding to the IMS terminal. If the internal terminal is an IMS terminal, the call is transmitted to the IMS terminal or the FMC controller via the CSCF emulation. If the internal terminal is a SIP terminal, the call is transmitted to the internal terminal corresponding to the corresponding IMS number via the PBX function. And is transmitted to the SIP terminal via the PSTN emulation if the internal terminal is the PSTN terminal. On the contrary, when a user connects a calling signal to the IMS Core as an IMS or PSTN as a preset terminal, the signal is received from the corresponding unit, and the main control unit transmits an outgoing signal to the IMS or PSTN through an external (service network operator) .

In this manner, a virtual IMS extension number is assigned to an extension terminal connected to the IMS Core system of the present invention, and an IMS number of an IMS service provider defined in IMS Emulation is linked with a virtual IMS extension number to process an incoming / outgoing call I will. Thus, the IMS Core of the present invention can perform the function of the enterprise's private branch exchange.

Also, since the IMS Core system of the present invention can use both the existing wired telephone network and the SIP phone including the PSTN processor, the SIP gateway, and the FMC controller, it bypasses the PSTN when the IMS service fails and bypasses the IMS when the PSTN fails. . Since the IMS Emulation must periodically exchange registration with the CSCF system of the IMS service provider, if the IMS service registration state is terminated due to a network failure or the like, it will bypass the outgoing call to the PSTN trunk line. PSTN Emulation monitors the connection status of PSTN CO line at all times. Therefore, if the PSTN CO line connection is disconnected due to the disconnection of the transmission line, the call to the PSTN CO line is diverted to the IMS service network.

Also, an extension number is assigned to an external IMS terminal or a SIP terminal by using a private IP address, so that the extension terminal uses all the Internet networks of the general public wireless network and does not use a separate communication carrier network, . Also, since the SIP gateway carries out the protocol conversion and performs the SIP-> IMS conversion and the IMS-> SIP conversion functions as shown in FIG. 13, the standard SIP terminal can be used without any additional firmware or software conversion. That is, SIP-IMS protocol conversion function is provided for use of existing SIP terminals.

The FMC controller supports Mobile VoIP including a Wifi phone and a smart phone by providing voice roaming between a wireless LAN network and a 3G / 4G network as shown in FIG. 14 by using the FMC controller function.

In addition, the IMS Core system provides APIs for interworking with Smart Work, CRM, and UC.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments Shall not be construed as limiting.

100: small capacity IMS Core system 110: main control unit
120: PSTN processing unit 130: SIP gateway
140: FMC controller 150: backplane

Claims (11)

A terminal apparatus for using an IMS service in cooperation with an IMS service provider network including an Internet telephone and an IPTV,
A main control unit (MCU) having IMS core functions including CSCF, MGW, and ABGF and IMS terminal functions; And
A backplane arranged to detect information on the Internet speed and Half / Full Duplex Mode according to each slot, and to exchange information according to a non-blocking manner between units including a main control unit;
Gt; IMS Core system. ≪ / RTI > An IMS Core including a CSCF, an MGW, and an ABGF is provided in the terminal device, and a main control unit (MCU) including a function of an IMS terminal is provided in the terminal device using the IMS service in cooperation with an IMS service provider network including Internet telephony and IPTV. ), And
T1 / E1 PSTN processing unit (LIU) including ports associated with PSTS systems including PRI, FXO, FXS;
A SIP gateway including a protocol conversion function for linking a SIP terminal including a SIP phone, a soft phone, a WiFi phone, and a DECT phone to an IMS device; And
An FMC controller including an IP address synchronization function of a mobile terminal including a roaming function for using an IMS service in a mobile environment;
The IMS Core system comprising: 3. The method of claim 2,
A unit including the main control unit, the PSTN processing unit, the SIP gateway, and the FMC controller,
IP communication is performed between each unit,
Control Bus for detection of coupling and disconnection of each unit and control of unit operation;
An IO interface for providing Sub-Rack information and slot address information as position information combined with each unit;
A backplane for automatically exchanging Internet speed and Duplex Mode for each slot and exchanging information between the units including the main controller, the PSTN processor, the SIP gateway, and the FMC controller in a non-blocking manner;
Gt; IMS Core system. ≪ / RTI > The method of claim 3,
In each of the units,
After booting after inserting in the system's slot, it reads the location information of the inserted slot from the backplane, automatically sets the IP address of each unit, performs the automatic opening procedure,
The main control unit is connected to the main control unit and compares the firmware version stored in the storage unit of the main control unit with its firmware version. If the firmware version is different, the firmware is automatically upgraded to the firmware stored in the main control unit. And performing an automatic upgrade process for performing a procedure for setting a function. 5. The method according to any one of claims 1 to 4,
The main control unit includes:
An IMS function including a Call Session Control Function (CSCF), an Access Board Gateway Function (ABGF), and a Media Gateway (MGW); And
SBC (Session Board Controller) function,
Wherein the IMS Core system comprises a single board. 5. The method according to any one of claims 1 to 4,
Wherein,
MGW (Media Gateway) function includes hardware capable of selecting FXO, FXS, E1 / T1 PRI interface according to the standard of a fixed telephone and replacing it by module. 5. The method according to any one of claims 2 to 4,
The PSTN processor performs the same IMS service as the IMS dedicated terminal by performing the IMS service number interlocking with each PSTN port so that the analog terminal connected to the PSTN port is recognized as the IMS terminal in the CSCF of the IMS service provider Capacity IMS Core system. 5. The method according to any one of claims 2 to 4,
The SIP gateway,
The SIP message is received from a terminal using the SIP protocol of a phone including a SIP phone, a soft phone, a WiFi phone, and a DECT phone, converted into an IMS message, transmitted to the subject part, and converted into an SIP message To the SIP terminal. 9. The method of claim 8,
Wherein the SIP gateway performs a plurality of SIP terminals to share one IMS service number by interworking one SIP terminal or a plurality of SIP terminals with respect to one IMS service number. 9. The method of claim 8,
Wherein the SIP gateway supports an IP-PBX or a media gateway using a SIP protocol and a head office / branch office configuration to support direct communication with an exchange number between each device. 5. The method according to any one of claims 2 to 4,
Wherein,
An IMS function including a Call Session Control Function (CSCF), an Access Board Gateway Function (ABGF), and a Media Gateway (MGW); And Session Board Controller (SBC); and for MGW (Media Gateway), FXO, FXS, and E1 / T1 PRI interfaces are selected according to the specifications of the wireline phone and replaced by modules;
The PSTN processor performs the same IMS service as the IMS dedicated terminal by performing the IMS service number interlocking with each PSTN port so that the analog terminal connected to the PSTN port is recognized as the IMS terminal in the CSCF of the IMS service provider ; And
The SIP gateway,
The SIP message is received from a terminal using the SIP protocol of a phone including a SIP phone, a soft phone, a WiFi phone, and a DECT phone, converted into an IMS message, transmitted to the subject part, and converted into an SIP message To the SIP terminal, and
Performing one SIP terminal or a plurality of SIP terminals for one IMS service number in cooperation with one another so that a plurality of SIP terminals share one IMS service number;
IMS Core system.

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