KR20020001408A - Method for offering virtual private network service in a exchange - Google Patents

Abstract

PURPOSE: A method for providing a virtual private network service by exchange is provided to reduce an installation expense for a private exchange because the private exchange is not required for constructing the private network by providing a virtual private network service by an exchange enabling the virtual private network service which has been provided limited to a PSTN. CONSTITUTION: After personal private network group information is registered for a telephone office(200) and a virtual private network code is transmitted from a mobile terminal to a CC of an exchange(201). The CC transmits a virtual private network ID to an NTR to request a number translation(202). The NTR analyzes the virtual private network ID and transmits a report of a wireless intelligent network call to the CC(203). The CC receives the report, analyzes whether a register number and a call origination subscriber access through a wireless network or a wired network, and calls a CLS while setting an analyzed information parameter(204). The CSL detects a trigger signal and transmits it to a WSFC(205). The WSFC checks the trigger(206). If the trigger signal is not a kind of an intelligent network service, the WSFC transmits the result accordingly(207). If the trigger signal is a kind of intelligent network service, the WSFC transmits a virtual private network ID(208). An LRSC transmits the virtual private network ID to a SCP(209). The SCP analyzes the virtual private network ID, converts it to a corresponding number and transmits digit numbers to the LRSC(210). The LRSC transmits the digit numbers to the SFC(211). The WSFC transmits a wireless intelligent network trigger report to the CC(212). The CC transmits the digit number to the NTR and requests a number translation(213). The NTR requests an outgoing routing from a RCO in order to obtain routing information(214). The RCO transmits a call set-up signal to an UPC(215). A call connection is made to the number translated destination subscriber and an intelligent network service is provided(216).

Description

How to provide virtual private network services at exchanges {METHOD FOR OFFERING VIRTUAL PRIVATE NETWORK SERVICE IN A EXCHANGE}

The present invention relates to a method of providing a virtual private network (hereinafter, referred to as a VPN) service at an exchange, and more particularly, to a method of enabling a mobile telephone network to be used as a private network of a subscriber.

In general, a VPN service is provided to use a switching network in the same manner as a private network of a specific organization. The VPN service enables interconnection between internal groups and between groups and external network users, and the service user is connected from the external network to the internal network. It is a service that enables connection.

In other words, the VPN service provides a function similar to the conventional private network function of forming a logical user group using a public communication network. The user does not directly establish a private network through a leased line. By subscribing to a VPN service, you can get services like using your own private network.

In other words, VPN service was provided for public telephone network, and mobile communication became mainstream of communication service, and virtual private network service in exchange network was profitable due to profitability such as securing subscribers by representative billing and billing discount or increasing call volume by extension call. There is an increasing demand for those who want to provide services. However, virtual private network services are not currently provided in the switched network.

Accordingly, an object of the present invention is to provide a virtual private network service in a switching network, and an object thereof is to provide a method for providing a virtual private network service in an exchange that enables a virtual private network service provided in a public telephone network to a switching network.

In the present invention for achieving the above object, a method for providing a virtual private network service at the exchange includes registering private private network group information with the SCP; Inputting a virtual private network identification number to the exchange to use the virtual private network service in the mobile terminal after the registration step is performed; Detecting a trigger signal for determining whether to perform an intelligent network service according to the input of the virtual private network identification number at the exchange, and checking the detected wireless intelligent network trigger; If it is a trigger signal for an intelligent network service in the checking step, transmitting, by the exchange, a virtual private network identification number for the intelligent network service to the SCP; Analyzing the virtual private network identification number in the SCP, converting it as a digit number for a corresponding called subscriber, and forwarding it to the exchange; Performing call processing to the called party of the converted digit number.

1 is a block diagram illustrating a method for providing a virtual private network service in a switch according to the present invention.

2 is a detailed flowchart illustrating a virtual private network service providing method in an exchange according to an embodiment of the present invention.

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

10: mobile terminal 20: switchboard

21: CC 22: NTR

23: CSL 24: WSFC

25: LRSC 26: RCO

27: UPC

A: SCP B: PSTN

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

Referring to FIG. 1, a block diagram illustrating a method for providing a virtual private network service in a switch according to the present invention includes a mobile terminal 10 and a switch 20.

The mobile terminal 10 is a mobile station which is mobile and fixed, and the mobile terminal 10 is controlled by a corresponding base station and a base station controller (not shown), and is free to move from the base station controller to a controllable area. It is a terminal. When a mobile terminal 10 having such a function is used and a call connection is attempted through a virtual private network identification number for implementing a virtual private network service, the mobile terminal 10 calls and occupies an incoming call (when passing through another station). Simultaneously with requesting, the virtual private network identification number is transmitted to the switch 20 through the base station and the base station controller.

The exchanger 20 includes a call control block 21 (hereinafter abbreviated as CC) 21, a number translation block (hereinafter abbreviated as NTR) 22, and a call processing library block ( Call processing System Library block (hereinafter, abbreviated as CSL) 23, Wireless intelligent network service function control block (hereinafter, abbreviated as WSFC) 24, and location register service control block ( Location Register Service Control block (hereinafter abbreviated as LRSC) 25, Route COntrol block (hereinafter abbreviated as RCO) 26, and ISUP trunk call control block (Hereinafter abbreviated as UPC) 27 is provided.

CC 21 is a block in charge of the call processing function of the subscriber using the mobile terminal 10, the virtual private network identification provided at the same time while controlling the call switching in accordance with the call request and incoming call occupancy request from the mobile terminal 10 The number is sent to NTR 22 to request that the number be translated. After that, the CC 21 receives a report called a wireless intelligent network call (WIN_CALL) according to the number translation result from the NTR 22, and then the call register number (callreg_no) and the originating subscriber to distinguish the calling mobile terminal 10. The CSL 23 is called while setting the analyzed info parameter for information (whether it is wireless or wired, or whether it is a relay call or a home call). In addition, the CC 21 requests the NTR 22 to translate the number by transmitting a digit number for the called party to perform the call processing to the actual called party according to the wireless intelligent network trigger report provided from the WSFC 24.

As the number translation block, the NTR 22 analyzes the virtual private network identification number provided from the CC 21 and transmits a report of the analyzed result, that is, a wireless intelligent network call (WIN_CALL), to the CC 21. In addition, the NTR 22 receives and analyzes the digit number of the called party for performing call processing from the CC 21 to the actual called party, analyzes the result, and delivers the analyzed result to the CC 21, and immediately obtains routing information. To the RCO 26 for routing.

The CSL 23 is a block in charge of a software library management function for controlling call processing. After the CSL 23 is called by the CC 21, the CSL 23 detects and detects a trigger signal for determining whether to perform an intelligent network service. The wireless intelligent network trigger is forwarded to the WSFC 24.

The WSFC 24 is a block that controls the intelligent network triggering for providing the intelligent network service of the mobile subscriber. The WSFC 24 checks the trigger provided by the CSL 23 to classify the trigger type (different type of intelligent network service). Then, the virtual private network identification number for this intelligent network service is transmitted to the LRSC 25. In addition, the WSFC 24 receives the digit number for the called subscriber (not shown) analyzed for the identification number from the LRSC 25, and then act code (act_code), which is a code type to continue the call processing. (Action code is a code for call connection or call release) and a term_type code (term type code is a code for called number), and the wireless intelligent network trigger report is transmitted to the CC 21. do.

The LRSC 25 is a block for processing an information transmission / reception message with a service controller (hereinafter, abbreviated as SCP) A. The LRSC 25 sends a virtual private network identification number provided from the WSFC 24 to the SCP (A). It receives the result of the analysis of the virtual private network identification number from SCP (A), that is, the digit number of the called subscriber and forwards it to the WSFC 24.

The RCO 26 is a block in charge of controlling a relay call of a mobile subscriber, and transmits a call setup signal to the UPC 27 according to a routing request from the NTR 26.

The UPC 27 is a block in charge of the relay call processing function with other exchanges (not shown), and is abbreviated as PSTN according to a call setup signal provided from the RCO 26. Then, the call path is set between (B), and the result is transmitted to the CC 21 as the call path is established.

A method of providing a virtual private network service in an exchange according to an embodiment of the present invention having the above-described configuration will be described with reference to the flowchart of FIG. 2.

First, the subscriber must apply to the telephone company to join the private private network. If the subscriber applies to the private network to join the private network, the telephone station registers the private private network group information with SCP (A) (step 200).

As described above, after the private private network group information is registered with the telephone station, the subscriber requests the call and incoming call occupancy (when passing through another country) using the mobile terminal 10 to use the virtual private network service. Entering a private network code (e.g., "193-1111"), the virtual private network code is transmitted from the mobile terminal 10 to the CC 21 in the switch 20 via a base station and a base station controller (not shown) (step 201). ).

The CC 21 controls the call switching (time switching) according to the call request and incoming call occupancy request from the mobile terminal 10 and transmits the virtual private network identification number provided to the NTR 22 to translate the number. (Step 202).

The NTR 22 analyzes the virtual private network identification number provided from the CC 21, and transmits the analyzed result, that is, a report of the wireless intelligent network call (WIN_CALL) to the CC 21 (step 203).

The CC 21 receives a report called a wireless intelligent network call (WIN_CALL) according to the number translation result from the NTR 22, and then the call register number (callreg_no) for distinguishing the calling mobile terminal 10 and the calling subscriber wirelessly. It analyzes whether it is accessed through a network or a wired network, and then calls the CSL 23 while setting an analyzed info parameter that analyzes whether it is a relay call or a local call (step). 204).

After being called by the CC 21, the CSL 23 detects a trigger signal for determining whether to perform an intelligent network service and transmits the detected wireless intelligent network trigger to the WSFC 24 (step 205).

WSFC 24 checks the trigger provided from CSL 23 (step 206).

If the trigger signal in the check step 206 is not the type of intelligent network service, the CC 21 transmits a result indicating that it is not the type of intelligent network service (step 207).

On the other hand, if the trigger signal in the check step 206 is an intelligent network service type, the virtual private network identification number for the intelligent network service is transmitted to the LRSC 25 (step 208).

LRSC 25 forwards the virtual private network identification number provided from WSFC 24 to SCP (A) (step 209). Then, SCP (A) analyzes the virtual private network identification number provided from the LRSC 25, converts it into a corresponding number, and transfers the digit number for the converted called subscriber to the LRSC 25 (step 210).

The LRSC 25 receives the digit number for the called subscriber analyzed for the virtual private network identification number from the SCP (A) and forwards it to the WSFC 24 (step 211).

The WSFC 24 uses the digit code for the called subscriber (not shown) provided from the LRSC 25 as an input parameter of an act code (act_code) and a term type code, which is a code type to continuously proceed with call processing. In step 212, the wireless intelligent network trigger report is transmitted to the CC 21.

The CC 21 requests the actual subscriber to transmit a digit number for the called subscriber to the NTR 22 to translate the number according to the wireless intelligent network trigger report provided from the WSFC 24 (step 213). ).

The NTR 22 analyzes the digit number for the called subscriber required from the CC 21, passes the analyzed result to the CC 21, and immediately requests outgoing routing to the RCO 26 to obtain routing information. (Step 214).

RCO 26 forwards the call setup signal to UPC 27 in accordance with the routing request from NTR 26 (step 215).

The UPC 27 controls the call path between the PSTNs according to the call setup signal provided from the RCO 26 to establish a call connection to a number-translated called subscriber (not shown) to provide an intelligent network service. It may be (step 216).

Therefore, the present invention provides a virtual private network service in an exchange that enables a virtual private network service, which has been limited to a public telephone network, to be provided in a switched network, thereby reducing installation costs and moving costs because it is not necessary to purchase a private exchange to build a private network. By simply applying for the wireless virtual private network function to the telephone company, the wireless virtual private network function is implemented, which significantly reduces the time to implement the function, and has the effect of maximizing the acquisition of new subscribers.

Claims (2)

A method for implementing a virtual private network function in a switch interoperating with a mobile terminal and a service controller (SCP) joined to a private private network group, Registering private private network group information with the SCP; Inputting a virtual private network identification number to the exchange to use a virtual private network service in the mobile terminal after the registration step is performed; Detecting a trigger signal for determining whether to perform an intelligent network service according to an input of a virtual private network identification number at the exchange, and checking the detected wireless intelligent network trigger; Transmitting a virtual private network identification number for the intelligent network service to the SCP, if the trigger signal is for the intelligent network service in the checking step; Analyzing the virtual private network identification number in the SCP, converting it to a digit number for a corresponding called subscriber, and forwarding it to a switch; And performing a call processing to the called party of the converted digit number. The method of claim 1, wherein the virtual private network identification number, And a digit number input by the mobile terminal, the digit number for using a virtual private network service.