KR100314150B1 - High speed virtual private network service providing apparatus and method - Google Patents

Abstract

The present invention relates to a high speed virtual private network service providing apparatus and a method thereof, by forming a new virtual private network for each subscriber by using a public communication network a plurality of private exchanges and general subscriber lines in which the virtual private network service is geographically distributed, The service users can make calls as if they are talking in the same private exchange, and also omit the process of sending / receiving outgoing numbers through a directly connected dedicated relay line, which reduces service quality due to the connection delay time, which has become a major problem in the spread of services. This has the advantage of improving, and since it is directly connected without passing through the originating station of the private exchange and intelligent network service exchange period, it has the advantage of reducing the probability of call failure due to multiple access hierarchy.

Description

High speed virtual private network service providing apparatus and method

The present invention relates to a high speed virtual private network service providing apparatus and a method thereof, and an apparatus for providing a direct connection connection method to an intelligent network service exchanger using a dedicated relay line for providing a quick service to virtual private network service subscribers accommodated in a private exchange facility, and It is about a method.

In general, a virtual private network service forms a new virtual private network for each subscriber by using a public switched network (hereinafter referred to as a PSTN) of a plurality of geographically dispersed private exchanges and general subscriber lines. It is a service that makes it possible to make a call inside the same private exchange and enables a VPN-specific private numbering system that is not related to the PSTN numbering system.

However, like other intelligent network services in commercial use, the virtual private network service must collect the calling user's phone number to determine whether the current user is a subscriber in the virtual private network and to charge a call when the service is terminated. Used as data essential for service processing.

Therefore, since the caller must dial the virtual private network service number and receive the caller ID collection process until the called party responds, the post dialing delay (PDD) is long because the user must wait to receive the service. There is a problem.

The present invention, in view of the conventional problems and requirements as described above, the service user due to the re-try of the middle caller, the same call due to excessive connection delay when the telephone user in the public network attempts to connect to the virtual private network service subscriber In order to eliminate the inconvenience and unnecessary waste of communication network resources, direct connection between the private exchange (PABX) and the intelligent network switching system is provided by a dedicated relay line. The purpose of the present invention is to provide a high speed virtual private network service providing apparatus and method for enabling private exchange users, who occupy a large portion of subscribers, to construct a wide range of individual private networks for a nationwide public telecommunication network out of the premises.

1 is a block diagram showing the configuration of an apparatus for providing a high speed virtual private network service according to the present invention and an intelligent network system linked thereto.

2 is a flow chart showing the overall operation of the provision of a high speed virtual private network service according to the present invention.

3 is a detailed flowchart illustrating an operation process of an intelligent network service exchanger during a process of providing a high speed virtual private network service according to the present invention.

* Explanation of symbols for main parts of the drawings

1: regular telephone subscriber 2: single station exchange

3: subscriber to the telephone 4: private exchange

5: E1 / T1 dedicated relay line 6: Intelligent network service switch (SSP)

6-1: Relay Line Matching and Intelligent Network Processing Unit

6-2: Application service elements and question and answer processing function

6-3: No.7 signal processing section 6-4: VPN route database

641: VPN route number field 642: VPN route name

643: virtual call number 644: call number length

7: No.7 signal network

8: intelligent network service control system (SCP)

9: service subscriber database

In order to achieve the above object, a virtual private network service providing apparatus for providing a virtual private network service having a single station or a private exchange directly connected to the intelligent network service control system, intelligent network service exchanges and service users, An E1 / T1 signaling class relay line directly connected between the intelligent network service exchangers; After storing the virtual calling number in the call processing shared data instead of the actual calling number of the service users, the relay line matching and intelligent network call processing unit which sets the calling number receiving flag and the network exist independently for each intelligent network service, and are collected from the calling terminal exchange. An application service element and the question and answer function application unit that configures the virtual private network number information in the form of a common line signal (No. 7), and a No. 7 signal that processes the No. 7 signal configured by the application service element and the question and answer function application unit. And an intelligent network service exchanger having a signal processing unit and an incoming route route database for storing data for subscribers using the E1 / T1 dedicated relay line, which is an incoming route dedicated route (VPN). The virtual private network service call is characterized in that the caller ID number is omitted.

In addition, in order to achieve the above object, a method for providing a virtual private network service, the method comprising: a first process of directly connecting an originating private exchange to an intelligent network service exchange using an E1 / T1 signaling class dedicated relay line; A second step of creating the direct-connected trunk line in a dedicated incoming route for a high speed virtual private network service and assigning a virtual call number to build a database; When a call requesting a service is inputted from the caller by calling the virtual private network service subscriber, a direct connection connection process is performed to determine whether the requested service call is a call requiring high-speed service processing, and if so, omits the process of collecting a caller number. Performing a third process; A fourth process of making a service request to the intelligent network service control system by using the information collected by performing the direct access connection process; A fifth step of providing, by the service control system receiving the service request, corresponding virtual private network number information if the call is serviceable through the service subscriber database; And a sixth process of attempting to connect a call in a single station exchange receiving the actual called number through the intelligent network service exchange receiving the information and connecting the call if it is in a normal state.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing the configuration of an apparatus for providing a high speed virtual private network service implemented by the present invention and an intelligent network system interworked with the same. An originating terminal switching center 2 to which the general telephone subscriber 1 belongs; A premise subscriber 3; A private exchange (4) to which the subscriber subscriber (3) belongs; An E1 / T1 dedicated relay line 5 for direct connection between the private switch 4 and the intelligent network service switch (SSP) 6; An intelligent network service exchanger (6) for providing an intelligent network service; The intelligent network service control system (SCP) 8; A common line signal network (No. 7) 7 for signal transmission between the intelligent network service exchanger 6 and the intelligent network service control system 8; A service subscriber database 9 is provided for storing information of service subscribers and providing information in response to a request for subscriber information by the intelligent network service control system 8.

The intelligent network service exchanger (6) includes a relay line matching and intelligent network processor (6-1) for storing a virtual calling number in call processing shared data instead of an actual calling number and setting a flag indicating that the calling number has already been received; Application Capabilities and Transaction Capability Application Part (TCAP), which exist independently of each intelligent network service, and constitute the No.7 signaling form of virtual private network number information collected from the originating switching center (2) (6 -2); A No. 7 signal processor 6-3 for processing the No. 7 signal configured in the application service element and the question-and-answer function application unit 6-2; And a VPN route database 6-4 which stores data for a subscriber using the E1 / T1 dedicated relay line 5, which is a dedicated relay route (VPN).

The incoming dedicated route database 6-4 includes an incoming dedicated route number field 64l; An incoming dedicated route name field 642; A virtual call number field 643, which is a substitute for a call number input to a calling end station; A calling number length field 644 indicating a length for the virtual calling number.

An operation process for providing a high speed virtual private network service in the apparatus of the present invention configured as described above is as follows.

In the public network, a call requesting connection with another virtual private network service subscriber is generated from the local telephone subscriber (3) belonging to an arbitrary private switching center (4), so that the relay line matching and the intelligent network processing unit (6-1) of the intelligent network service switching system (6). If the information is inputted through the network, the incoming information is requested to the intelligent network service control system 8 interworking with the intelligent network service switch 6 and the signal network No. 7.

Subsequently, after receiving the incoming information of the corresponding service subscriber from the intelligent network service control system 8, the intelligent network service exchanger 6 attempts routing for the incoming connection, and when the destination terminal of the virtual private network service subscriber is in a normal state, the caller The service is successfully completed by connecting between the called party and the called party.

As described above, the general virtual private network service processing procedure for the private telephone subscriber 3 belonging to the outgoing private exchange 4 is as described above, and the high speed virtual private network service connection method according to the present invention is an internal telephone belonging to the private exchange 4 In order to provide a high speed virtual private network service to the subscribers 3, the subscriber 3 is a main service object. A separate E1 / T1 relay line 5 connected directly to the exchanger 6 is provided.

The high speed service processing process using the E1 / T1 dedicated relay line 5 is similar to the service processing of the general telephone subscriber 1 belonging to the calling end station switch 2, but the intelligent network service switch ( 6) Configure one incoming private route (VPN) for the direct connection path in the network.

As described above, one dedicated route is allocated to each private exchange 4 connected by direct connection in the intelligent network service switch 6, and each dedicated route has a database 6-4 to which a unique virtual call number is assigned. Built in the intelligent network service exchanger (6).

The method for providing a high speed virtual private network service provided by the present invention based on the above-described apparatus processes a virtual private network service network internal, network external, external, etc. classified according to the location of a caller and a called party belonging to a public network. It also comes with additional services such as call forwarding.

The processing of the network internal call and the network call starts by entering a trunk line access number (for example, '9') for the service user connected to the private exchange 4 to generate the virtual private network service call.

After that, the sender hears the dial tone provided by the end-station exchanger 2 and uses the virtual private network number or network password function identification number together with a service access code (SAC) to generate a network internal code or network external code.

A network call is a call generated when calling another service subscriber in the same virtual private network, and a network call is generated when a subscriber in a virtual private network calls a general PSTN subscriber outside the network.

A virtual private network service external call is a service call in which any PSTN user outside the virtual private network calls a subscriber in the virtual private network.The caller inputs the service identification number and the virtual private network representative number so that the call is an external call to a specific virtual private network. Inform.

This call is routed to the intelligent network service exchanger (6), and the intelligent network service exchanger (6) recognizing this sends out an announcement requesting the input of a password, and the caller receives the virtual private network service even outside the network by inputting the password assigned to him. You will have the right to do so.

The intelligent network service exchange 6 then continues to provide another announcement to allow the caller to enter the virtual private network number of the service subscriber that the caller wishes to call.

From this point, it is similar to the network internal call, and the fee for the entire section is charged to the virtual private network service subscriber.

The speed dial function, which is provided as a virtual private network service add-on function, makes a network call more convenient. The basic call processing procedure is the same as that of the network call.

However, it uses a different function identification number to distinguish it from the network encryption, except that it uses a shortcut number instead of a PSTN number.

As another additional function, the call forwarding function has four different procedures: registered registration, intra-area transfer registration, off-area transfer registration, and deregistration.The basic procedure is to assign a service identification number and each function identification number. After inputting, it is made by inputting outgoing virtual private network number to be registered or released according to the announcement provided by the intelligent network service exchange.

FIG. 2 is a flowchart illustrating a detailed process of a method for providing a high speed virtual private network service according to the present invention for performing the above function, and '*' shown in the drawing is a mark indicating that the processing is selectively performed.

After any service user in the private exchange 4 existing in a particular virtual private network has lifted the handset to call the called party as long as it is housed in another private exchange belonging to the same virtual private network (Off-Hook) (21), the virtual private network Dial the service call.

The calling private exchange 4 connects the dial tone 22 to the service user, and the user checks the subscriber number to be input by the user and inputs the virtual private network number (VPN) together with the service identification number (SAC) or the specific shortcut number. (23).

Subsequently, the calling private switch 4 transmits the service identification number and the virtual private network number together while routing the call to the intelligent network service switch 6 (24).

When the intelligent network service exchanger 6 detects a call requesting a virtual private network service, the intelligent network service exchanger 6 searches the database 6-4 for the incoming route and checks whether it is set as a VPN route.

If it is not a VPN route, it performs the process of requesting and collecting the calling number to the calling station as in the existing service processing process.In addition, it checks whether the call is a VPN route and requires the virtual private network service as a result of the station number translation. If not, send out the broadcasting number announcement to block all calls except service calls.

In other words, all the incoming calls to the intelligent network service exchanger 6 through the dedicated relay line are handled only by the VPN service call, so that the charges for other local calls generated in the private exchange 4 are lost and the call processing failure occurs. To prevent it.

If the station number translation result is a virtual private network service call, the database 6-4 for the incoming route is searched to obtain a virtual call number, and the inter-state relay signal processing process is terminated.

R2 signaling takes up a large part of the domestic relay signaling system, and in the network environment where most of the private exchanges support only the R2 signaling system, the service quality is omitted by omitting the sending and receiving process through the above process. Significantly reduce the Post Dialing Delay (PDD) in the R2 relay signal processing, which was the main cause of the degradation, and enables high-speed processing of services.

As mentioned above, in the intelligent network service processing, the calling number information is essential data, which is necessary for authentication of the service subscriber, restriction of calling area, and generation of billing data.

As a condition to be considered when creating VPN route data in the intelligent network service exchanger 6, the route to be assigned as a VPN route must be an existing route, and the root class is set as an incoming route and assigned to another VPN route. It should not be used.

In addition, the VPN route can be created only if it does not belong to the station information table, which is the data referenced after the station translation.

VPN route database (6-4) structure consists of incoming route dedicated route number, virtual caller number and caller number length assigned to the route, and search for such database during number translation during service call processing. It forwards the virtual calling number information obtained after the search with the station number translation result to the incoming call processing process.

At this time, the VPN route database (6-4) has established operator commands so that each system can establish its own database because the operation status of the private exchange (4) accommodated by the intelligent network service exchange (6) in the country is different. To add, create, delete, modify, and output the database 6-4.

In consideration of the system resource capacity in the intelligent network service switch 6, the maximum number of private exchanges that can be accommodated in a direct connection, that is, the size of the maximum VPN route is limited to a certain number.

After searching the database 6-4, the intelligent network service exchanger 6 that obtains the virtual calling number omits the step of requesting and collecting the calling number to the calling station which was performed in the general virtual private network service processing. The perceived intelligent network service exchanger 6 transmits the signal with the non-billing state and the charging information to the calling end station (25) to terminate the relay signal processing and prevent the calling end station from charging this call.

This is because the virtual private network service generally makes outgoing billing, and the calling party cannot generate billing data because the actual destination location of the virtual private network subscriber who wants to be called is not known.

Therefore, the intelligent network service exchanger 6 prevents the calling station from charging and generates charging data using the calling number and the actual called number that the system has.

After all the data necessary for the intelligent network service request is obtained, a response signal is finally sent 26 to the calling station.

The call forwarding information is sent to the intelligent network service control system 8 having the profile information of the service subscriber in order to obtain the information for the actual call to the virtual private network service subscriber with the calling number, calling grade, and virtual private network number obtained as described above. The requesting inquiry message is transmitted in the form of command providing 27.

Since the intelligent network service exchanger 6 and the intelligent network service control system 8 interoperate with the No. 7 signaling network 7 as mentioned above, the virtual private network number information collected from the calling station is converted into the No. 7 signal format. In order to compose, related functions are processed through the Transaction Capability Application Part (TCAP) 6-2 and the application service element 6-2 that exists independently for each intelligent network service.

In the intelligent network control system 8, after receiving a message, if there is a restriction function such as selective call restriction on the call, the intelligent network service exchanger 6 causes the user to check if it is restricted or cannot provide a service for other reasons. If necessary, send the appropriate announcement, and if the license number is required, collect additional information of the required number of digits through mutual procedures (using announcement, etc.) with the service user (28). If the permission number is not necessary, the above steps (28) to (31) are omitted.

When receiving the message requesting the license number, the intelligent network service exchanger 6 guides the service user to the service user through an announcement broadcast (29).

The service user enters the permission number according to the guidance (30).

The intelligent network service exchanger 6 sends the collected permission number to the intelligent network service control system 8 and waits for the next action (31).

Intelligent network service control system (8) determines whether the authority for the various functions available in the call through the received message and passes the routing information, billing information, etc. to the intelligent network service exchanger (6) in the form of command provision. Transmit (32).

At this time, if the intelligent network service control system 8 needs information such as a call connection state for the incoming call, it sends an event notification request together.

If a large number of service requests occur and system load problems occur, an automatic call blocking (ACG) message for network management is also sent to the intelligent network service exchanger 6 to control the call.

The intelligent network service exchanger 6 connects the call to the called party using routing information received from the intelligent network service control system 8 (33).

The destination private exchange transfers the actual state of the called party and the charging information to the intelligent network service exchange 6 (34), and sends a call signal to the called party to inform that the call has been generated (35).

The terminating private exchange also sends a ring tone to the service user to inform the status of the current call (36).

When the called party answers, the called party private exchange sends a response signal to the intelligent network service exchange 6 (37).

Accordingly, the intelligent network service exchanger 6 establishes a call state by connecting the calling party and the called party to the call (39).

When the call is connected, the intelligent network service exchanger 6 generates charging initial data by using the call connection time and the charging information transmitted from the intelligent network service control system 8.

The condition for restoring a call is when the caller first ends the call (On-Hook) while in a busy state (40).

The originating fact exchange informs the fact to the intelligent network service exchange 6 (41).

The intelligent network service exchanger (6) notifies the call when a request has been sent from the intelligent network service control system (8) to inform it upon recovery (42).

The intelligent network service exchanger 6 sends a recovery message to the called party to recover the called party's connection state (43).

It also creates and processes the final billing record for this call. The called party's private exchange connects a beep signal indicating that the caller has terminated the call so that the called party also acknowledges the end of the service (44).

FIG. 3 is a flowchart illustrating a detailed process of the intelligent network service exchanger 6 when providing a high speed virtual private network service according to the present invention. The relay line matching and the intelligent network processor 6-1 in the intelligent network service exchanger 6 are relay lines. As a software functional unit for controlling the call processing performed through the network, a three-digit digit is received from the incoming route (52), and a station number translation request is made by the number translation block (53).

Upon receiving the request for translation of the station number, it is first determined whether the call is entered into the VPN route (54), and then the station number translation is performed.

Combination of the result of the call with the result of the VPN route and the translation of the station number, and if the call is a VPN route and is not a virtual private network service, the call is transmitted by intercepting the station number (56, 57).

In other words, the VPN route is dedicated only to the virtual private network service and does not allow the general call and other intelligent network services to be relayed through the route.

In other cases, the VPN route database 6-4 in the intelligent network service exchanger 6 is searched to obtain a virtual call number for the VPN route, and the relay line matching and intelligent network processing unit 6-1 together with the station number translation result. (58,59).

Subsequently, the relay line matching and intelligent network processing unit 6-1 stores the virtual calling number received from the number translation means (not shown in the drawing) in call processing shared data instead of the actual calling number through the relay line matching function. Set a flag indicating that has already been received (60).

After receiving both the service recognition code and the function setting code of the virtual private network service, the relay line matching and intelligent network processing unit 6-1 makes an intelligent network service processing request through the relay line matching function. The caller ID information is requested to the trunk line matching unit so that the caller ID, which is essential information for service processing flow control, can be collected.

The relay line matching function, which has received the calling number reception request, sends a relay signal requesting the sending of the calling number to the calling station to determine whether to receive the actual calling number, as mentioned above, by determining the calling number flag (62).

In this case, since the calling number flag is already set in the station number translation step, the call requesting the high speed virtual private network service is omitted in the process of relay signal processing by omitting the process of requesting the calling number to the calling station and immediately ending the relay signal processing. The service connection delay time is reduced (63, 64).

In other words, in order to solve the problem of delayed connection delay (PDD) of the virtual private network service, the transmission and reception process of the calling number is omitted when signaling between relay stations, and the dialing is made using a predetermined virtual calling number instead of the actual calling number. After that, the connection delay time is reduced.

As described in detail above, the present invention forms a new virtual private network for each subscriber by using a public telecommunication network for a plurality of private exchanges and general subscriber lines in which virtual private network services are geographically distributed, thereby providing the same service to the user. It is possible to make a call inside the exchange, and also to reduce the service quality due to the connection delay time, which is a major problem in service spreading because it omits the calling and receiving process through a directly connected dedicated relay line. Since it is directly connected to the private exchange and the intelligent network service exchange period without passing through the calling station, it has the advantage of reducing the probability of call failure due to multiple access hierarchy.

In addition, preferred embodiments of the present invention are disclosed for the purpose of illustration, those skilled in the art will be able to make various modifications, changes, additions, etc. within the spirit and scope of the present invention, such modifications and modifications belong to the following claims You will have to look.

Claims (6)

An apparatus for providing a virtual private network service having an intelligent network service control system, a single station or a private exchange directly connected to an intelligent network service exchanger, and a service user, comprising: an E1 directly connected between the private exchange and the intelligent network service exchange; Trunk line for T / T1 signal level; After storing the virtual calling number in the call processing shared data instead of the actual calling number of the service users, the relay line matching and intelligent network call processing unit which sets the calling number receiving flag and the intelligent network service exist independently for each intelligent network service, and are collected from the calling terminal exchange. An application service element and the question and answer function application unit that configures the virtual private network number information in the form of a common line signal (No. 7), and a No. 7 signal that processes the No. 7 signal configured by the application service element and the question and answer function application unit. And an intelligent network service exchanger having a signal processing unit and an incoming route route database for storing data for subscribers using the E1 / T1 dedicated relay line, which is a dedicated route route (VPN). High speed virtual private network service, characterized in that the call number is omitted for the virtual private network service call Ball unit. The system of claim 1, wherein the incoming dedicated route database comprises: an incoming dedicated route number field; An incoming dedicated route name field; A virtual calling number field, which is a substitute for a calling number input to a calling end station; And a calling number length field representing a length of the virtual calling number. CLAIMS 1. A method for providing a virtual private network service, comprising: a first process of directly connecting an originating private exchanger to an intelligent network service interrogator using an E1 / T1 signaling class dedicated relay line; A second step of creating the direct-connected trunk line in a dedicated incoming route for a high speed virtual private network service and assigning a virtual call number to build a database; When a call requesting a service is inputted from the caller by calling the virtual private network service subscriber, a direct connection connection process is performed to determine whether the requested service call is a call requiring high-speed service processing, and if so, omits the process of collecting a caller number. Performing a third process; A fourth process of making a service request to an intelligent network service control system by using the information collected by performing the direct access connection process; A fifth step of providing, by the service control system receiving the service request, corresponding virtual private network number information if the call is serviceable through the service subscriber database; And a sixth process of attempting to connect a call at a single station exchange receiving the actual called number through the intelligent network service exchange receiving the information and connecting the call if it is in a normal state. 4. The method of claim 3, wherein the database of the second process comprises: an incoming dedicated route number field; An incoming dedicated route name field; A virtual calling number field, which is a substitute for a calling number input to a calling end station; And a calling number length field indicating a length of the virtual calling number. 4. The method of claim 3, wherein the direct access connection process comprises: a first step of determining whether the call is a call entered as an incoming route when the service request call is input; If the call is a call entered as an incoming route and is a virtual private network service, a second step of searching the database to obtain a virtual call number for the incoming route, and transmitting it to the intelligent network service exchange together with the station number translation result; A third step of setting a calling number reception flag through a relay line matching and intelligent network processing unit when receiving the virtual calling number; And providing a fourth step of terminating the relay line signal processing process through the set flag. 6. The high speed virtual private network service according to claim 5, wherein if the service call requested in the second step is a call entered as an incoming route and is not a virtual private network service, the service number is interrupted by transmitting a station number guide broadcast. Way.