KR100466861B1 - Integration of Wire and Wireless Type Private Network System and Method - Google Patents

Abstract

PURPOSE: A relay system of integrated wired/wireless networks and method thereof are provided to construct a virtual private network at a low cost without using an expensive leased line. CONSTITUTION: A mobile terminal(110) wirelessly executes a telephone call with the other side. A radio base station(120) executes location registration for the mobile terminal(110) located in an area which is managed by the radio base station(120), and executes transmission and reception of radio signals, conversion of a communication protocol, and encryption/decoding. A plurality of extension telephones(160,170) are connected with a wire communication network for executing the telephone call with the other side. A central branch exchange(150) executes connection switch function to the extension telephones(160,170). A virtual private network server(210) executes an exchange program to perform call connection between the extension telephones(160,170) and the mobile terminal(110). A mobile switching center transmits a call request together with an extension number if the mobile terminal(110) inputs the extension number. If the call request is transmitted, The mobile switching center executes an exchange function to execute the telephone call with the mobile terminal(110). A virtual private number database(220) stores extension numbers and information related to extension numbers in a virtual private network number system(200).

Description

Wired and wireless integrated private network relay system and method {Integration of Wire and Wireless Type Private Network System and Method}

The present invention relates to a wired / wireless integrated private network relay system and method, and more particularly, to connect a mobile communication network and a wired telephone network to a private line so that a telephone call can be performed using a private network number system in which wired and wireless are integrated between a mobile terminal and a premises terminal. The present invention relates to a wired / wireless integrated private network relay system and method.

Organizations of more than a certain scale, such as corporations or government offices, use a private line with the outside for communication within the organization, but have an internal exchange system with internal wiring.

1 is a block diagram schematically showing the configuration of a conventional premises switching system connected to a mobile communication network.

As shown in FIG. 1, the conventional premises exchange system 100 includes an premises exchange 150, an extension telephone 1 160, and an extension telephone 2 170, a mobile terminal 110, and a wireless base station 120. , Mobile communication switching center 130, and PSTN 140 are used.

The mobile terminal 110 is a terminal that makes a phone call by wirelessly calling the other party. The wireless base station 120 includes a base station transceiver system (BTS) 122, a base station controller (BSC) 124, a repeater (Cell Enhancer), and the like.

The base station transmitter 122 is arranged in units of cells, and the mobile terminal 110 transmits a call request generated from the mobile terminal 110 to the mobile communication switching station 130 or exists in a cell area under its control. Perform location registration by grasping the location of. In addition, the base station transmitter 122 functions to maintain a wireless communication call or communication path with respect to the mobile terminal 110.

The location registration is a processing procedure for notifying the mobile switching center 130 of the location, status, identifier, slot period, and other characteristics of the mobile terminal 110 through the base station transmitter 122. This is a procedure for effectively calling the mobile terminal 110 when the incoming call is to be set to the terminal 110. The location registration of the mobile terminal 110 is performed when the mobile terminal 110 is turned on or off, when the mobile terminal 110 moves between the mobile communication switching stations 130, and the parameters of the mobile terminal 110 are used. Is carried out when is changed.

The base station controller 124 performs various functions necessary for radio call processing such as handoff while controlling and managing a plurality of base stations. The base station controller 124 also transmits subscriber information of the location registered mobile terminal 110 to the mobile communication switching center 130.

The mobile communication switching center 130 has a control function for allowing the wireless base station 120 to operate efficiently and an interworking function with an exchange of a public telephone network. When the mobile communication switching center 130 registers the location of the mobile terminal 110 through the wireless base station 120, the visitor location register (VLR) in the mobile communication switching station 130 is referred to as 'VLR'. After temporarily storing subscriber information of the mobile terminal 110 in 134, the mobile device 110 requests a location registration of the mobile terminal 110 to a home location register (HLR). .

Here, the HLR 132 is a database that stores a service profile regarding subscriber information of a user of the mobile terminal 110. The HLR 132 includes a subscriber's telephone call and a mobile identification number (MIN) of the mobile terminal 110. It has information about the Electronic Serial Number (ESN) and the type of service. The HLR 132 stores a subscriber information including information of the wireless base station 120 in which the mobile terminal 110 is located and the mobile communication switching center 130. The mobile communication switching center 130 is composed of a control unit, a call path unit and a peripheral device, and also has a charging data collection function for the mobile terminal 110.

The PSTN 140 is a public switched telephone network, and provides a connection path for telephone calls between general wired terminals and telephone calls between wired and wireless.

The premises exchange 150 is connected to the PSTN 140 to perform an exchange function for a telephone call between a plurality of internal extension telephones 160 and 170 or a telephone call between extension telephones 160 and 170 and an external telephone.

That is, the conventional premises switching system configured as described above is used for in-house telephone exchange in an enterprise or the like. For example, when a user of the mobile terminal 110 calls the extension telephones 160 and 170, the user calls the representative number of the premises exchange 150, and then guides the premises number provided by the premises exchange 150. According to the message, the user of the mobile terminal 110 has made a telephone call between the mobile terminal 110 and the extension telephones 160 and 170 by inputting the extension number of the extension telephones 160 and 170 of the person who wants to talk.

Therefore, in order to make a phone call with the users of the extension phones 160 and 170, a process of inputting a plurality of buttons was required. In the case of a call that is vying for time due to urgent business, the button input process was very troublesome.

In addition, since the conventional branch exchange 150 is fixedly installed in the PSTN 140, an extension user accommodated in the branch exchange 150 presses a specific identification number, for example, '9' to make an outside call. Since the process of inputting the number 110 is performed, it is troublesome for the users of the extension phones 160 and 170, too.

In order to solve the above problems, the present invention provides a wired / wireless integrated private network relay system configured to connect a mobile communication network and a local wired telephone network to a private line so as to perform a telephone call using a private network number system in which wired and wireless are integrated between a mobile terminal and a local terminal. The purpose is to provide a method.

1 is a block diagram schematically showing the configuration of a conventional premises exchange system connected to a mobile communication network,

2 is a block diagram showing the configuration of a wired / wireless integrated private network relay system according to a preferred embodiment of the present invention;

3 is a block diagram schematically showing the internal configuration of the VPN server;

4 is a flowchart illustrating a wired / wireless integrated private network relay method according to an exemplary embodiment of the present invention.

<Description of Symbols for Main Parts of Drawings>

100: premises exchange system 110: mobile terminal

120: wireless base station 130: mobile communication switching center

140: PSTN 150: premises exchange

160, 170: extension telephone 200: private network relay system

210: VPN server 220: VPN number database

230: mobile communication switching center 310: program storage unit

320: memory 330: control unit

340: Display unit 350: NIC

360: database server 370: key input unit

In order to achieve the above object, the present invention provides a wired / wireless integrated private network relay system that integrates a wired communication network and a mobile communication network to perform communication using an extension number system, comprising: a mobile terminal wirelessly performing a telephone call with the other party; A wireless base station that performs location registration with respect to the mobile terminal located in an area under its jurisdiction and performs transmission and reception of wireless signals and conversion and encryption / decryption of a communication protocol for the mobile terminal; An extension telephone connected to the wired communication network to perform a telephone call with the other party; A branch exchange that performs a connection exchange function for the extension telephone; A virtual private network server performing a switching function with a switching program so that a call connection is made between the extension telephone and the mobile terminal; When an extension number is input from the mobile terminal, a call request is transmitted to the virtual private network server together with the extension number. When a call request of the extension telephone is transmitted from the virtual private network server, a telephone call is made with the mobile terminal. A mobile telecommunication switching center performing a switching function; And a virtual private network number database storing information on the extension number as an integrated virtual private network number system of the extension telephone and the mobile terminal.

According to another object of the present invention, there is provided a wired / wireless integrated private network relay method of a system having the above configuration, the method comprising the steps of: (a) the mobile terminal and the extension telephone are in a standby state for a telephone call; (b) requesting a call by entering an extension number in the mobile terminal or the extension telephone; (c) determining, by the virtual private network server, a terminal corresponding to the extension number; (d) the virtual private network server performing a call connection of the mobile terminal or the extension telephone based on the information on the extension number stored in the virtual private network number database; And (e) making a telephone call between said mobile terminal, said extension telephone period, and said mobile terminal and said extension telephone period.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

To date, companies have expanded their private networks by leasing dedicated lines to telecom operators so that branch offices, sales offices or mobile workers can work without regional restrictions. This private network is not only expensive for initial investment in various network equipment and software, but also expensive for communication line, and requires a lot of human and material resources to operate and manage the network. In order to solve such high cost and inefficient management of the existing private network, a virtual private network (VPN) is a method of using the Internet network as if a private network was established as a private line.

Since virtual private networks only need to connect with corporate communication networks and Internet service providers, there is no need to purchase and manage expensive equipment or software separately, and it is possible to utilize ICT-related expertise that is difficult to obtain in a general enterprise. In addition, home workers, frequent employees, and field workers can connect to the Internet service provider and connect to the company through the public network called the Internet. It is much easier to share data between branch offices and branch offices.

2 is a block diagram showing the configuration of a wired / wireless integrated private network relay system according to a preferred embodiment of the present invention.

Wired and wireless integrated private network relay system 200 according to the present invention is a mobile terminal 110, a wireless base station 120, PSTN 140, VPN server 210, VPN number database 220, mobile communication switching center 230, The branch exchange 150, the extension telephone 1 (160), the extension telephone 2 (170) and the like.

The VPN server 210 is a computer terminal having a function of allowing a mobile terminal 110 subscribed to a mobile communication network to communicate with a number system having an extension number, such as an internal terminal. 2 (170) and the mobile terminal 110 performs the exchange function to communicate using the integrated extension number.

To this end, the VPN server 210 may store a VPN number database in which an extension number set in a VPN number system for extension phone 1160, extension phone 2 170, and mobile terminal 110 to have an integrated extension number. 220).

In the VPN number database 220, for example, the numbers 1 to 2000 are set to the extension numbers of the extension phones 1 160 and 2, 170, and the numbers 3000 to 5000 are assigned to the mobile terminal 110. The extension number of the wireless terminal such as this is set. Also, from 6000 to 8000, an extension number of a general wired terminal connected to the PSTN 140 may be allocated.

That is, the wired / wireless integrated private network relay system 200 according to the present invention shown in FIG. 2 physically connects the existing mobile communication network and the private network through the VPN server 210, and the mobile terminal 110 or the extension telephone 160, If the extension number is input at 170, the VPN server 210 connects the terminal corresponding to the extension number.

In addition, instead of the VPN server 210, it is also possible to install a switching program that connects the VPN number in the premises exchange 150 or the mobile communication exchange 130 by software.

The mobile communication switching center 230 cooperates with the VPN server 210, and when an extension number, for example, an extension number of the extension telephones 160 and 170, such as “1204”, is input from the mobile terminal 110, the VPN server is input. Call 210 and the call request with the extension to make a phone call between the extension phone (160, 170) and the mobile terminal (110).

3 is a block diagram schematically illustrating an internal configuration of the VPN server 210.

As shown in FIG. 3, the VPN server 210 may include a program storage unit 310, a memory 320, a controller 330, a display unit 340, and a network interface card (NIC). 350), the database server 360, the key input unit 370 and the like.

When the program storage unit 310 receives a call request according to the input of the extension number from the extension phones 160 and 170 to the mobile terminal 110, a call connection is made to the mobile terminal 110 corresponding to the input extension number. To perform the exchange function, or when the call request to the input of the extension number from the mobile terminal 110 via the mobile communication exchange station 130, performing the exchange function for the call connection to the extension telephone having the corresponding extension number The exchange program is stored. The exchange program may be implemented in various ways according to the operating system (OS) of the VPN server 210. For example, the exchange program may be implemented in a 'C' programming language or an object-oriented 'C ++' or 'Java' programming language.

The memory 320 temporarily stores data processed by the controller 330 or temporarily stores input data received from the mobile terminal 110.

The controller 330 controls the overall apparatus, and in particular, when a call request is made according to the input of the extension number from the extension phones 160 and 170 to the mobile terminal 110, the mobile terminal 110 corresponding to the input extension number. When a call request is made to perform an exchange function so that a call connection is made to the call, or an input of an extension number from the mobile terminal 110 through the mobile communication switching station 130, for a call connection to an extension telephone having the corresponding extension number. Control the exchange function.

The display unit 340 is provided in the form of a monitor so that an administrator who manages the VPN server 210 may view the display unit 340. The mobile terminal 110 and the extension phone as well as the processing status of the key input from the key input unit 370 may be viewed. Displays the connection status between the 160 and 170. The NIC 350 is a communication module that provides a communication interface for communication with the mobile switching center 130, the PSTN 140, the premises exchange 150, and the like.

The database server 360 controls data input and output of the VPN number database 220. The database server 360 functions to update and store data input from the key input unit 370 in the VPN number database 220 under the control of the control unit 330. The VPN number database from the key input unit 370 is also stored. When the output request of the data stored in the 220 is requested to perform the function of reading the data from the VPN number database 220 and output.

The database server 360 is a software program of the meeting management server 260 using, for example, an "Oracle9i DB Release 2" server program of Oracle or a server program of "MS-SQL Server 2000" of Microsoft. Is installed.

The key input unit 370 is used for inputting data when the administrator manually adds or updates the information of the VPN number database 220 manually. In addition, when updating the exchange program of the program storage unit 310, or when updating the database server 360, it is used for data input.

4 is a flowchart illustrating a wired / wireless integrated private network relay method according to an exemplary embodiment of the present invention.

First, the call request according to the input of the extension number in the mobile terminal 110 will be described, and then the call request from the extension phones 160 and 170 to the mobile terminal 110 will be described.

While the mobile terminal 110 is powered on, the mobile terminal 110 searches for a wireless carrier received by the antenna while sequentially increasing or decreasing the demodulation frequency, and based on the level of each demodulated signal input thereto. The base station 120 to which it belongs is identified.

At this time, the mobile terminal 110 stores the level of the received data and sets the demodulation frequency based on the reception frequency having the largest level value. In addition, the mobile terminal 110 receives a broadcast channel (BCCH) from the base station 120, grasps the information of the base station, reads its subscriber information (IMSI), and transmits it to the base station to perform a registration procedure. .

Thereafter, when the registration process is completed, the mobile terminal 110 searches for a mode state currently set in the terminal, and controls the operation of the terminal based on this. The mobile terminal 110 is normally set to a telephone mode for a telephone call of a mobile communication network, and is in a standby state while there is no telephone call.

In addition, the extension phone 1 (160), the extension phone 2 (170), etc., which are connected to the premises exchange unit 150 also remains in the standby state unless there is a key input for the call request (S410).

Subsequently, when the user inputs an extension number that the extension telephone has, for example, “1105”, from the mobile terminal 110 to talk to the extension telephone, the call request signal including the extension number is a wireless signal and the wireless base station 120 is transmitted. The wireless base station 120 is delivered to the mobile switching center 230.

When the mobile communication switching center 230 transmits a call request signal including an extension number from the mobile terminal 110 (S420), the mobile communication switching center 230 recognizes an extension number that is different from a number system of the mobile terminal 110 of the mobile communication network, and recognizes a VPN server ( In step S422, the call request signal is transmitted with the extension number.

The VPN server 210 transmits the call request signal to the premises exchange 150 so that the premises exchange 150 is connected to the extension telephones 160 and 170 of the extension number corresponding to the call request (S424).

Therefore, a telephone call is performed between the mobile terminal 110 and the extension telephones 160 and 170 via the VPN server 210 and the mobile communication switching center 230 (S426).

Meanwhile, when the mobile terminal 110 and the extension phones 160 and 170 are in a standby state for a phone call, an extension number is input from the extension phones 160 and 170 instead of a call request from the mobile terminal 110. If there is a call request to 110 (S430), the call request from the extension phone (160, 170) is forwarded to the VPN server 210 via the premises exchange 150.

The VPN server 210 identifies the counterpart terminal corresponding to the extension number input from the extension phones 160 and 170 (S432). For example, when the extension number input from the extension telephones 160 and 170 is "3214", the extension number of 3000 is the number assigned to the mobile terminal, and thus is recognized as the number for the mobile terminal, and the VPN number database ( The number of the mobile terminal 110 corresponding to "3214" is read from 220.

Subsequently, the VPN server 210 transmits a call request signal including the number of the mobile terminal 110 corresponding to “3214” read from the VPN number database 220 to the mobile communication switching center 230 (434).

The mobile communication switching center 230 transmits the call request signal to the wireless base station 120 that manages the number of the mobile terminal 110 among the call request signals transmitted from the VPN server 210, and the wireless base station 120 transmits the corresponding mobile base station 120. By transmitting a call request signal to ring the telephone ring to the terminal 110, a call connection is made between the extension telephones 160 and 170 and the mobile terminal 110 via the VPN server 210 and the mobile communication switching center 230. (S436).

According to an embodiment of the present invention, a wired / wireless integrated private network relay system and method configured to connect a mobile communication network and a local wired telephone network to a private line to perform a telephone call with a private network number system in which wired and wireless are integrated between a mobile terminal and an internal terminal may be realized. Can be.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, the use of a virtual private network (VPN) has the advantage of establishing a private network at a low cost without using a dedicated circuit having a high line rental cost. In addition, the user's convenience is greatly increased by simply performing a process of inputting a plurality of buttons for the user of the mobile terminal to make a phone call with the user of the extension telephone.

Claims (7)

In the wired / wireless integrated private network relay system that integrates a wired communication network and a mobile communication network to perform communication using an extension number system, A mobile terminal for wirelessly making a phone call with the other party; A wireless base station that performs location registration with respect to the mobile terminal located in an area under its jurisdiction and performs transmission and reception of wireless signals and conversion and encryption / decryption of a communication protocol for the mobile terminal; An extension telephone connected to the wired communication network to perform a telephone call with the other party; A branch exchange that performs a connection exchange function for the extension telephone; A virtual private network (VPN) server that performs a switching function with a switching program to make a call connection between the extension telephone and the mobile terminal; When the extension number is input from the mobile terminal, the call request is transmitted to the virtual private network (VPN) server together with the extension number. When the call request of the extension telephone is transmitted from the virtual private network (VPN) server, the mobile terminal is transmitted. A mobile communication switching center for performing a switching function to make a telephone call with the mobile communication switch; And Virtual private network number database that stores information about the extension number in the integrated virtual private network (VPN) number system of the extension telephone and the mobile terminal Wired and wireless integrated private network relay system comprising a The method of claim 1, wherein the virtual private network (VPN) server, When there is a call request according to the input of the extension number from the extension telephone to the mobile terminal, the mobile terminal performs a switching function such that a call connection is made to the mobile terminal corresponding to the input extension number or from the mobile terminal. A program storage unit for storing an exchange program for performing an exchange function for a call connection to an extension telephone having the extension number when a call request is inputted through the exchange station through the input of the extension number; When the call request is made according to the input of the extension number from the extension telephone to the mobile terminal, the device performs an exchange function so that a call connection is made to the mobile terminal corresponding to the input extension number, or the movement is performed. A control unit for controlling an exchange function for a call connection to an extension telephone having the extension number when a call request is input from the terminal to the extension number through the mobile communication switching station; A memory for temporarily storing data processed by the controller or temporarily storing input data received from the mobile terminal; A display unit provided in the form of a monitor so that an administrator who manages the virtual private network (VPN) server can display the display, and displaying a connection state between the mobile terminal and the extension telephone; A network interface card (NIC) providing a communication interface for communication with the mobile communication switching center and the premises exchange; A database server controlling data input / output of the virtual private network number database; And Key input unit for inputting data when manually adding or updating information content of the virtual private network number database, or for inputting data when updating the exchange program and when updating the database server. Wired and wireless integrated private network relay system comprising a. The method of claim 2, The database server may store the data input from the key input unit in the virtual private network number database under the control of the controller, or store the data in the virtual private network number database or request the output of data stored in the virtual private network number database from the key input unit. Wired and wireless integrated private network relay system, characterized in that to perform the function of reading and outputting data from the database. The method according to claim 1 or 2, The exchange program is a wired / wireless integrated private network relay system, characterized in that installed in the premises exchange and the mobile communication switch in software. A mobile terminal for wirelessly making a phone call with the other party; A wireless base station that performs location registration with respect to the mobile terminal located in an area under its jurisdiction and performs transmission and reception of wireless signals and conversion and encryption / decryption of a communication protocol for the mobile terminal; An extension telephone connected to a wired communication network to perform a telephone call with the other party; A branch exchange that performs a connection exchange function for the extension telephone; A virtual private network (VPN) server that performs a switching function with a switching program to make a call connection between the extension telephone and the mobile terminal; When the extension number is input from the mobile terminal, the call request is transmitted to the virtual private network (VPN) server together with the extension number. When the call request of the extension telephone is transmitted from the virtual private network (VPN) server, the mobile terminal is transmitted. A mobile communication switching center for performing a switching function to make a telephone call with the mobile communication switch; And a virtual private network number database storing information on the extension number in the integrated virtual private network (VPN) number system of the extension telephone and the mobile terminal. (a) the mobile terminal and the extension telephone are in a waiting state for a telephone call; (b) requesting a call by entering an extension number in the mobile terminal or the extension telephone; (c) determining, by the virtual private network (VPN) server, a terminal corresponding to the extension number; (d) the virtual private network (VPN) server performing a call connection of the mobile terminal or the extension telephone based on the information on the extension number stored in the virtual private network number database; And (e) making a telephone call between said mobile terminal, said extension telephone period, and said mobile terminal and said extension telephone period; Wired and wireless integrated private network relay method comprising a. The method of claim 5, wherein In step (c), if the terminal corresponding to the extension number is the mobile terminal, the virtual private network (VPN) server reads the number of the mobile terminal corresponding to the extension number from the virtual private network number database and the Wire and wireless integrated private network relay method characterized in that for transmitting a call request signal containing the number of the mobile terminal to a mobile communication switching center. The method of claim 5, wherein In step (c), if the terminal corresponding to the extension number is the extension telephone, the virtual private network (VPN) server is a wired / wireless integrated private network relay method, characterized in that for transmitting the call request signal to the branch exchange.