KR20140028857A - Small ims core system - Google Patents

Abstract

Embodiments of the present invention relate to a small IMS core system applicable to a group of customers. According to the present invention, the small IMS core system allows the group of customers (enterprise, organization, school, etc.) to operate a cable telephone (POTS) system and an Internet telephone system together inside, and supports a Non-IMS terminal such as a wired/wireless IP telephone, or a smart phone so that the Non-IMS terminal is used as an IMS terminal. The small IMS core system includes a main control unit (MCU) for simply providing only functions necessary for the group of customers among functions of an IMS structure; a PSTN processing unit (LIU; line interface unit) used for physical port expansion of the wired telephone (POTS); an SIP gateway for converting a standard SIP message into an IMS message; and an FMC controller for supporting a wireless terminal, such as a wireless IMS terminal/smart phone, so that the wireless terminal is used in a mobile environment. The system includes a virtual Ethernet back-plane based on IP communication so that each unit exchanges information at a high data rate. [Reference numerals] (120) PSTN processing unit LIU; (130) SIP Gateway; (140) FMC Controller; (150) Back-plane; (AA,CC,DD) Control; (BB) Main control unit (MCU)

Description

Small IMS CORE System {SMALL IMS CORE SYSTEM}

Embodiments of the present invention relate to a small capacity IMS Core system applicable to a group customer.

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. 3GPP was formed in December 1998, and the project includes the European Telecommunication Standards Association (ETSI), the Japan Radio Industry Association (ARIB), the Japan Telecommunications Technology Association (TTC), the China Telecommunications Standards Association (CCSA), and the American Telecommunications Business Union ( ATIS) and Korea Information and Communication Technology Association (TTA). 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 used to provide multimedia service and Internet service in mobile communication environment. This technology is also applied to wired telephone service provision, but IMS focuses on personalized service using Global Numbering, which is different from typical corporate telephone service environment. In addition, it is burdensome for companies to take out the existing telecommunication infrastructure already invested at a huge cost and introduce new IMS terminals. It is also expensive to install new LAN cable in factories or conference rooms that do not have IP environment. Holding Therefore, it is necessary to develop a new type of communication system for companies that want to gradually utilize IMS services while gradually utilizing 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.

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

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.

In a preferred embodiment of the present invention, there is provided a unit including the main control unit, PSTN processing unit, SIP gateway, FMC controller, IP communication is performed at high speed between each unit, the detection and Control Bus for controlling unit operation; An IO interface for providing Sub-Rack information and slot address information as position information combined with each unit; Backplane equipped for non-blocking information exchange between each unit including main controller, PSTN processor, SIP gateway, and FMC controller by automatically detecting 10/100 / 1000Mbps Ethernet speed and Half / Full Duplex Mode. Characterized in that it comprises a.

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.

In addition, another effect of the present invention, it is possible to smoothly proceed to the introduction of application solutions that can increase the work efficiency, such as mobile office, smart work, 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.

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 IMS service by interworking with IMS service provider network including Internet phone and IPTV, and equipped with IMS Core including CSCF, MGW, ABGF, and including main functions 110, MCU It is to include. 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, the main control unit, a PSTN processing unit, a SIP gateway, a unit including a FMC controller and a unit interface are provided, and a configuration is provided in which IP communication is performed at high speed between each unit. In particular, the control bus for detecting the combination and disconnection of each unit and controlling the operation of the unit, the IO interface for providing sub-rack information and slot address information with the location information of each unit, and 10/100 / 1000Mbps Back-Plane equipped for non-blocking information exchange between each unit including main controller, PSTN processor, SIP gateway and FMC controller by automatically detecting Ethernet speed and half / full duplex mode for each slot This invention is comprised, including these. That is, the backplane is based on IP communication so that each unit (UNIT) can exchange information at high speed, or is implemented as a virtual Ethernet back-plane.

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).

-BGCP (Break Gateway Control Function): SIP Server that provides 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): Performs conversion between RTP and PCM by interworking 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 described in the accompanying drawings, the small-capacity IMS Core system 100 according to the present invention includes a unit such as a scu, a main control unit, a PSTN processing unit, a SIP gateway, an FMC controller, a unit interface, and the like on the backplane 150, back-plane. It is provided, through this unit a plurality of terminals that each function is connected 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. Thus, if the compared firmware version is different, the automatic upgrade is performed to the firmware stored in the main control section. Also, the detailed configuration information of the unit is read from the main control section DB, and the procedure of automatically setting the function is performed. Is to implement an 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.

In addition, the main control unit 110 (MCU) performs an IMS function through a call session control function (CSCF), an access board gateway function (ABGF), a media gateway (MGW), and a SBC (Session Board Controller) function. To do. 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.

In addition, the main control portion is composed of a plurality of CPU Core. In addition, each core is assigned a function to be assigned, and in order to modularize the software for each function, communication is carried out in a message exchange method between each software module. Thus, it is possible to flexibly cope with the user's use by improving the convenience of modifying and adding additional functions and by allowing each function to be distributed and operated on separate independent hardware so that the use of the customer and user can be expanded.

In addition, in the small-capacity IMS Core system 100 according to the present invention, the PSTN processing unit 120 corresponds to the characteristics of various PSTN physical ports to which exchanges, including analog telephones, local telephone exchanges, and ISDN exchanges, are connected. It is to provide option board corresponding to physical port of. 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.

In the PSTN processing unit as described above, a plurality of CPU cores are used. In addition, it assigns a function to each core. In addition, by modularizing the software for each function and communicating by message exchange method between each software module, it is provided to improve the convenience of modifying and adding a function, and to operate each function distributed in separate independent hardware. Thus, there is an advantage that can be flexibly handled even if the scale of use of customers and users is expanded.

Next, the SIP gateway receives the SIP message from the terminal using the SIP protocol, such as a SIP phone, a soft phone, a WiFi phone, and a DECT phone, converts the message into an IMS message and transmits the message to the main control unit, and sends the IMS message received from the main control unit. It is to provide the SIP gateway function to convert the SIP message 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.

In addition, the SIP gateway is composed of several CPU Cores. And it is to assign the function to each core. In addition, by modularizing the software for each function and communicating by message exchange method between each software module, it is possible to improve the convenience of modification and additional work, and to make each function distributed and run on separate independent hardware. Therefore, even if the scale of use of the customer and the user is expanded, it is possible to flexibly cope with the inconvenience.

Next, in the FMC controller, when the IMS service is used in the mobile environment of a terminal such as a WiFi phone, a DECT phone, or a smartphone (soft phone), the terminal information DB is updated by tracking the change in the IP address and port number of the terminal in real time. By doing so, the connection of the terminals is operated smoothly. 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.

Furthermore, the FMC controller is composed of several CPU cores. In addition, it assigns a function to each core. In addition, the software is modularized for each function, and communication between each software module is carried out to improve the convenience of modifying and adding additional functions. By flexibly coping with the expansion, it is carried out so that there is no inconvenience in the scale of use scale.

The small-capacity IMS Core system according to the present invention is suitable for building an IMS solution for a company of 1,000 employees or less, or a small multimedia service provider.

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.

Such a small-capacity IMS Core system of the present invention can be used not only in the use of the enterprise IMS service, but also in countries that do not provide IMS services because the IMS structure such as CSCF and MGW. By providing SIP-Gateway function to interwork with SIP-based internet phone service, SIP-based soft switch and standard SIP phone are interlocked. The key features of this small capacity IMS Core system are as follows.

-Incoming / outgoing call by selecting IMS or PSTN: Provides corporate branch exchange function.

-Mutual backup of telephone service: bypass IST service to PSTN, if PSTN failure, bypass IMS.

-Provide free call / SMS service between extension terminals by assigning extension number to external IMS terminal or SIP terminal.

-Standard SIP terminal support: Protocol conversion function between SIP and IMS for use of existing SIP terminal.

-Mobile-VoIP support: Provides voice roaming between wireless LAN network and 3G / 4G network using FMC-Controller function.

-API for interworking with Smart Work, CRM, UC, etc.

Detailed description of the small-capacity IMS Core system 100 according to the present invention provided as described above will be described with reference to the accompanying drawings.

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.

3 shows 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, FIG. 7 is an example of a hierarchical structure diagram of the main controller 110 of the small-capacity IMS Core system 100. The main control unit implements some or all of the functions used for accommodating the group customer among the functions of the IMS structure, and is distributed and executed in multiple CPU cores. Network port of main controller is divided into WAN port and LAN port. Voice / data packet between each network port and CPU Core is exchanged by IP method through Multi Layer Bus. In the Multi Layer Bus, the security control function and QoS / Congestion management function of the main control 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 on each core follow the definition of each function of the IMS structure. PSTN ports connected to main controller are connected to DSP Core through TSI (TDM bus), SLIC is an analog terminal, SLAQ is an analog trunk line, and T1 / E1 Framer is a module used to connect digital T1 / E1 line. Is a device that converts analog signals into digital PCM.

8 is a hierarchical structure diagram of the PSTN processing unit 120. The PSTN processing unit implements some or all of the functions required for PSTN interworking among the functions of the IMS structure, and is distributed and driven in multiple CPU cores. The network port of the PSTN processing unit is connected to the backbone plane, and voice packets and control messages between the network port and the CPU core are exchanged by the IP method through the multi-layer bus. In the Multi Layer Bus, the main control unit performs security management 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 on each core follow the definition of each function of the IMS structure. PSTN ports connected to PSTN processing unit are connected to DSP Core through TSI (TDM bus), SLIC is an analog terminal, SLAQ is an analog trunk line, and T1 / E1 Framer is a module used to connect digital T1 / E1 line. Is a device that converts analog signals into digital PCM.

9 is a hierarchical structure of the SIP gateway 130. The SIP gateway provides an IP-PBX function corresponding to the standard SIP terminal, and is implemented to provide the function of the IMS terminal in response to the CSCF of the main controller 110, and is distributed and driven in multiple CPU cores. The network port of SIP gateway is divided into WAN port and LAN port, and data packet between each network port and CPU Core is exchanged by IP method through System Bus. The standard SIP terminal is registered in the Register Server of the Application Core by accessing the WAN port or the LAN port according to the location where the terminal is installed, and the call processing control and RTP packet transmission are performed through the proxy. In order to communicate with an IMS terminal or to use an 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 interwork with the CSCF of the main processor 110. Communication between SIP terminals connected to the SIP gateway uses a private telephone number (extension number) assigned by the SIP gateway to communicate with the SIP method.

10 is a hierarchical structure of the FMC controller 140. The FMC controller is implemented to provide the function of the IMS terminal in response to the CSCF of the main controller 110 and to provide the CSCF function in response to the IMS terminal used in the mobile communication environment. Network port of FMC controller is divided into WAN port and LAN port. Data packet between each network port and CPU Core is exchanged by IP method through System Bus. IMS terminal is connected to the CSCF of the Application Core by connecting to the WAN port, LAN port is used by the FMC controller to communicate with the main controller 110. The FMC Server module provides roaming processing between wireless APs, roaming between 3G / 4G mobile communication data networks and wireless APs so that IMS terminals can be used while on the move, and communication applications (soft) installed in portable terminals (smartphones, etc.) In case of implementing IMS terminal with phone app (App, phone call application, etc.), IMS is activated by TCP method to activate communication application (soft phone, telephone call application, etc.) every time the receiver receives a call. Additional functions such as sending a message or sending an activation message such as a soft phone app are provided. Since communication between IMS terminals connected to FMC controller uses IMS service number, CSCF and AS (Application Server) of IMS service provider should be used.

According to the small-capacity IMS Core system 100 according to the present invention prepared as described above, IMS service is established in a group customer (corporate, institution, school, etc.) such as a company having 1,000 employees or less and a small multimedia service provider. IMS phone, SIP phone, PSTN phone connection, mobile communication environment, etc., each terminal has the advantage of building an extension phone or multimedia system.

Although the embodiments of the present invention have been described in detail above, since the embodiments have been described to easily carry out the present invention by those skilled in the art to which the present invention pertains, the present invention will be described by the description of the embodiments. The technical idea of is not to be construed as limited.

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

Claims (29)

A main control unit (MCU) having an IMS Core including CSCF, MGW, and ABGF and including functions of an IMS terminal, as an end device using an IMS service in connection with an IMS service provider network including an Internet telephone and an IPTV; And
Small capacity IMS Core system including backplane equipped to exchange information by non-blocking method between units including main controller by automatically detecting 10/100 / 1000Mbps Ethernet speed and Half / Full Duplex Mode .
A terminal device that uses IMS services in connection with an IMS service provider network including an Internet phone and an IPTV, and includes a main control unit (MCU) having an IMS Core including CSCF, MGW, and ABGF and including functions of an IMS terminal.
T1 / E1 PSTN processing unit (LIU) including ports associated with PSTS systems including PRI, FXO, FXS;
A SIP gateway including a protocol conversion function to interwork with an IMS device without changing firmware with a SIP terminal including a SIP phone, a soft phone, a WiFi phone, and a DECT phone; 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;
Small capacity IMS Core system, characterized in that it comprises any one or more of.
3. The method of claim 2,
A unit including the main controller, PSTN processing unit, SIP gateway, FMC controller is provided,
High speed IP communication between units
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;
Backplane equipped for non-blocking information exchange between each unit including main controller, PSTN processing unit, SIP gateway, and FMC controller by automatically detecting 10/100 / 1000Mbps Ethernet speed and Half / Full Duplex Mode. ;
Small capacity IMS Core system comprising a.
The method of claim 3,
The backplane (Back-Plane),
It supports external network switch or network port connecting IP terminal.
Small capacity IMS Core characterized in that the IP terminal using the internal IP address is directly connected to the backplane using a private IP without going through the WAN port of the main controller to communicate with the main controller, the SIP gateway, and the FMC controller. system.
The method of claim 3,
Each unit has two private IP addresses.
One hidden private IP address is used to form a virtual Ethernet network between units, and one public IP address is provided by an external IP terminal directly to each unit via an external network connection port of the backplane. Small capacity IMS Core system, characterized in that it is provided for use in connection.
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,
Access the main controller and compare the firmware version stored in the main controller's storage with its own firmware version, and if the firmware version is different, perform the automatic upgrade to the firmware stored in the main controller, and read the detailed configuration information from the DB of the main controller automatically. A small capacity IMS Core system, characterized in that for performing an automatic upgrade process that performs a procedure for setting a function.
3. The method according to claim 1 or 2,
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,
Small capacity IMS Core system, characterized in that provided as a single board.
3. The method according to claim 1 or 2,
Wherein,
MGW (Media Gateway) function is a small capacity IMS Core system, which includes hardware that can be replaced by module by selecting FXO, FXS, E1 / T1 PRI interface according to wired telephone standard.
3. The method according to claim 1 or 2,
Small capacity IMS characterized in that it is provided to ensure the voice call quality by setting the network bandwidth (Bandwidth) and packet processing priority available for each type of traffic, per port for the network traffic delivered to the main control via the backplane from the main control Core machine.
3. The method according to claim 1 or 2,
The main control unit is a small-capacity IMS Core system, characterized in that for recognizing the harmful attack packet to the IMS Core to the network traffic received through the WAN port through the Internet, the connection of the IP terminal that sends the packet.
3. The method according to claim 1 or 2,
The main control unit recognizes a packet that attempts to steal the IMS service by illegally accessing the IMS Core to network traffic received through a WAN port through the Internet, and cuts off the connection of the IP terminal that sends the packet. Small capacity IMS Core machine.
3. The method according to claim 1 or 2,
The main control unit configures two WAN ports in an active / stand-by manner, and when a network cable connected to an active WAN port or an active WAN port or a network switch fails, and a connection to the Internet occurs, the Internet is connected to a stand-by WAN port. A small capacity IMS Core system, characterized by providing network port redundancy.
3. The method according to claim 1 or 2,
The main control unit is configured to be duplexed in an active / stand-by manner, and if a failure occurs in the active main control unit, the main control unit of the main control unit is changed to the active mode, and the existing active main control unit is changed to the stand-by mode. Small capacity IMS Core system, characterized in that to provide.
14. The method of claim 13,
In the main control part duplication function, the setting change occurring in the active main control part, the registration information of the terminal, and the call processing log are delivered to the stand-by main processor in real time so that the active / stand-by switching is performed in real time. Small capacity IMS Core system, characterized in that to provide.
3. The method according to claim 1 or 2,
The main control unit consists of several CPU Cores to assign a function to each core, modularizes the software for each function, and increases the convenience of modifying and adding additional functions by communicating in a message exchange method between the respective software modules. Small capacity IMS Core system, characterized in that the function is distributed in separate independent hardware to operate.
3. The method of claim 2,
PSTN processing unit,
It provides option boards corresponding to each physical port corresponding to PSTN physical ports of exchanges including analog telephones, local telephone exchanges, and ISDN exchanges, and automatically recognizes the type of option boards installed in the PSTN processing unit. A small capacity IMS Core system that automatically changes the settings screen and functions.
3. The method of claim 2,
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.
3. The method of claim 2,
The PSTN processing unit connects a trunk line of a branch exchange or a keyphone system to a PSTN analog port, and the analog / digital terminals connected to the corresponding device are provided to share one IMS service number.
3. The method of claim 2,
The PSTN processing unit is connected to the ISDN port of the premises exchange or keyphone system to the ISDN digital port, the analog / digital terminals connected to the device is characterized in that the small capacity IMS Core system characterized in that it is provided to share multiple IMS service numbers.
3. The method of claim 2,
The PSTN processing unit connects a local exchange of a telephone station to a PSTN port so that a plurality of terminals connected to an IMS Core can make a call to a local exchange connected through a PSTN network, and receive a telephone incoming signal directly received through the PSTN network. Small capacity IMS Core system characterized in that it is provided.
3. The method of claim 2,
When the connection between the IMS Core and the IMS Service Provider's call processing device (CSCF) is lost due to Internet failure or network failure, it provides a backup function that automatically bypasses the outgoing call of the terminal connected to the IMS Core to the PSTN network. Small capacity IMS Core system.
3. The method of claim 2,
The PSTN processing unit is composed of a plurality of CPU Cores,
The designated function is assigned to each core, and the software is modularized for each function, and the message exchange method is communicated between each software module to improve the convenience of modification and additional work, and each function is distributed on separate independent hardware. Small capacity IMS Core system, characterized in that driven.
3. The method of claim 2,
The SIP gateway,
Receive SIP message from terminal using SIP protocol of phone including SIP phone, soft phone, WiFi phone, and DECT phone, convert it into IMS message and transmit it to main control part, and convert IMS message received from main control part into SIP message Small capacity IMS Core system, characterized in that for transmitting to the SIP terminal.
3. The method of claim 2,
The SIP gateway is a small capacity IMS Core system, characterized in that for performing a plurality of SIP terminals share one IMS service number by interworking one SIP terminal or a plurality of SIP terminals for one IMS service number.
3. The method of claim 2,
The SIP gateway supports IP-PBX or media gateway using a SIP protocol and a headquarter / branch configuration to directly communicate with each station extension number between devices.
3. The method of claim 2,
The SIP gateway is composed of a plurality of CPU Cores,
The designated function is assigned to each core, and the software is modularized for each function, and the functions are modified and added by communicating with each other through message exchange between each software module, and each function is distributed and operated on separate independent hardware. Small capacity IMS Core system, characterized in that.
3. The method of claim 2,
The FMC controller,
In case of using IMS service in the mobile environment of the terminal including WiFi phone, DECT phone and smart phone (soft phone), the terminal information DB is updated by tracking the change of IP address and port number of the terminal in real time, and the communication application of the terminal. When making a call through a small capacity IMS Core system, characterized in that to automatically activate the communication application of the other terminal in the standby state when receiving the call.
3. The method of claim 2,
The FMC controller is characterized by providing a SBC (Session Boarder Controller) function to support a mobile terminal to maintain a session even when accessing the FMC controller via multiple IP routers. IMS Core system.
3. The method of claim 2,
The FMC controller is composed of a plurality of CPU Cores,
The designated function is assigned to each core, and the software is modularized for each function, and the message exchange method is communicated between each software module to improve the convenience of modification and additional work, and each function is distributed on separate independent hardware. Small capacity IMS Core system, characterized in that driven.

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