KR20030054372A - Method of send call route re-setting for VoIP gateway with internet network trouble - Google Patents

Abstract

PURPOSE: A method of resetting an originating call path when an Internet network of a VoIP gateway has a failure is provided to give various conditions when sensing a network failure, and to reset an originating call path according to each condition, thereby enabling a manger to easily manage the network and a subscriber to be satisfied with service quality. CONSTITUTION: While having a conversation on the phone by connecting a call with a VoIP communication system(S101), the VoIP communication system monitors a link state(S102). The VoIP communication system decides whether a failure is caused by physical cut-off(S104), or by communication malfunction of a gatekeeper that cannot receive a response message(S105), or by a request of the gatekeeper receiving an ARJ(S106), or by quality deterioration of an Internet network(S107), or by a request of a receiving gateway(S108). The VoIP communication system retrieves a receiving number of a preset detour path(S110), and resets a path by originating a call(S111).

Description

Method of send call route re-setting for VoIP gateway with internet network trouble}

The present invention relates to call setup through an IP network in a VoIP (voice over internet protocol) gateway. In particular, when a failure occurs in the IP network, the VoIP gateway can bypass a call to the bypass path to improve user satisfaction. The present invention relates to a method for resetting an outgoing signal path in case of an IP network failure of a VoIP gateway.

VoIP gateway plays a role of sending and receiving general voice call through IP network and using it like a normal phone.

1 is a block diagram showing the configuration of a communication system using a VoIP gateway.

Referring to FIG. 1, a telephone 11 used by a general user for a telephone call and an exchanger 20 connecting the telephone 11 to the Internet network 50 or the PSTN 30 to connect a call; Gateway A 40 for interworking a voice call with a packet call for a call connection with the Internet network 50 through the switch 20, and a counterpart Gateway B 70 for communicating with the Internet network 50 for communication. And a gatekeeper 60 for connecting the gateway A 40 and the gateway B 70, a counterpart switch 80, and a telephone 91.

In addition, the general telephone 12 is connected to the gateway A 40 is configured to connect a call.

When the VoIP gateway communication system configured as described above transmits a call using the phones 11 and 12, the VoIP gateway communication system is transferred to the VoIP gateway 40 through the switch 30, or directly through the gateway A 40 through the Internet network ( 50), the voice is packetized and delivered to the other party through the Internet network 50 to connect the call.

The function of the gateway 40 will be described below.

2 is a block diagram showing a functional block of a VoIP gateway.

Referring to FIG. 2, the gateway is connected to the switchboard 20 or the public telephone network 30 via a digital or analog interface to receive a call, and a trunk interface block 41 and an internet interface for call delivery to the Internet 50. Block 45, a call management block 43 for VoIP call processing and management, a system management block 44 for operating and managing a gateway system, and a routing control block 42 for controlling a connection path of each call. It is configured to include).

That is, when the trunk interface block 41 receives a call through the line (a) connected to the switch 20, the call management block 42 sets a path in the routing control block 42 according to the called number information of the call. ) To perform the call processing process and connect through the Internet interface block 45.

In addition, when resetting the bypass path due to the network failure is to connect the call received from the line (a) to the line (b) to be a call connection through the public telephone network (30).

3 is a flowchart illustrating a procedure of call connection via an internet network using a conventional VoIP gateway.

Referring to FIG. 3, when the telephone 11 connected to the switch 20 originates a call, when the telephone 11 originates a call (S11), the gatekeeper A 40 passes through the call exchanger 20. Gateway A 40 receives the called party's number through line (a) connected with the switch 20 or subscriber telephone 12 and connects with the Internet network 50 by line (c) ( S12, the operation is different depending on whether the gatekeeper 60 is present or not (S13), and if there is a gatekeeper 60 as shown in FIG. 1, a call message to the gateway B 70 through the gatekeeper 60. And (S14), if there is no gatekeeper 60 directly transfers the call to the gateway B (70) (S15).

The call transferred to the gateway B 70 calls the switch 80 or the subscriber telephone 91 at the gateway B 70 (S16), and when the called party answers (S17), the call can be made. (S18).

If a problem occurs in the connection of the Internet network 50 during a call of the connected call as described above, or if the network state becomes poor due to an overload, the gateway resets another route and connects the call to the PSTN network or connects a new route to the Internet. It can be set through network to maintain good call quality.

In order to set such a path, the same process as in FIG. 4 is performed.

4 is a flowchart illustrating a procedure of an outgoing call rerouting method in a conventional VoIP gateway.

Referring to FIG. 4, during a call connection (S21), the gateway A 40 periodically transmits a ping message to the counterpart gateway B 70 (S22).

The gateway A 40 checks whether a response comes for a limited time (S23), and when a response is received (S24), determines that the connection state of the network is good.

However, if there is no response within the time limit, the gateway A 40 resets the route to the bypass path (b) instead of the line (c) to which the first line is connected, and connects to the other party through the PSTN 30 network to make a phone call. To be (S25).

However, the conventional method of resetting the outgoing signal to the bypass path by checking the network status at the gateway cannot use a method of directly connecting a call from the exchange directly to the public telephone network instead of the bypass path back to the public telephone network through the gateway. .

That is, by blocking the line with the switch at the gateway, it was difficult for the switch to directly connect the call to the public telephone network, and thus the bypass path connecting the public telephone network through the gateway must waste resources.

In addition, even when the LAN line problem or the VoIP call connection itself is impossible, there is a problem in that the function of connecting the interface with the exchange is not provided if only the function of connecting the bypass path is provided.

Therefore, it is impossible to control the rerouting function of the originating gatekeeper from a device in the management system such as a gatekeeper, and only a network state control through a ping causes a problem in that the load of the gateway becomes large when many circuits are connected.

In order to solve the above problems, the present invention provides a function to enable the redirection path reset even when the exchange and the gateway are connected by a digital trunk, and can set the bypass path differently according to the rerouting condition of the network state. Network manager can manage call route setting through gateway in a variety of ways, and reconfigure outgoing call route in case of internet network failure of ＰｏＩffigway, which can increase subscriber's telephone call quality and greatly increase satisfaction. The purpose is to provide.

1 is a block diagram showing a configuration of a communication system using a VoIP gateway.

2 is a block diagram showing a functional block of a VoIP gateway.

3 is a flow chart showing a sequence of call connection via the Internet network using a conventional VoIP gateway.

4 is a flowchart illustrating a procedure of an outgoing call rerouting method in a conventional VoIP gateway.

5 is a flowchart illustrating a procedure of a method for resetting an outgoing signal path when an IP network fails in a VoIP gateway according to an exemplary embodiment of the present invention.

6 is a flowchart illustrating a procedure of a PBX link blocking method according to failure monitoring of a gateway in a method for resetting an outgoing signal path when an IP network failure of a VoIP gateway according to an embodiment of the present invention is performed.

According to the present invention, a method for resetting an outgoing signal path in the event of an Internet network failure of a VoIP gateway is provided.

Detecting an abnormality of the IP network during a call in a VoIP communication network system;

Determining whether to re-route according to an error type of the IP network;

Determining the rerouting to retrieve a rerouting table for rerouting;

And attempting to connect a call through a bypass line designated in the rerouting table, and connecting the call.

Preferably, the abnormality of the IP network includes rerouting due to abnormality due to physical disconnection of the LAN link;

Rerouting due to a communication failure with the gatekeeper;

Rerouting the gatekeeper's needs;

Rerouting due to degradation of network quality;

It is possible to determine the rerouting at the request of the destination gateway.

Preferably, in the case of rerouting due to physical disconnection of the LAN link or communication failure with the gatekeeper, an outgoing signal for resetting may be directly attempted at the exchange.

Preferably, in the case of the resetting of the network due to the deterioration of the network quality or the request of the destination gateway, only a predetermined line according to a predetermined value required or preset is rerouted.

Preferably, the bypass line of the rerouting table is configured to include a function for processing the called number, including an access code for connecting with the incoming call.

Preferably, if the call is not connected,

Periodically monitoring the link with the Internet network at the gateway and checking whether a failure occurs;

As a result of the check, a step of confirming that the disabled is unable to connect to the Internet network due to disconnection of LAN link or abnormal gatekeeper;

As a result of the check, if the disabled can not connect to the Internet network, the gateway further comprises the step of requesting the blocking to the exchange to connect the outgoing call to the public telephone network.

Preferably, the step of determining that the gateway is able to access the Internet network through the periodic link monitoring in the state that the blocking is requested;

As a result of the determination, the connection to the Internet network is restored, and further comprising the step of transmitting a block release request signal to the exchange.

Referring to the accompanying drawings, a method for resetting an outgoing signal path in the event of an internet network failure of a VoIP gateway according to the present invention configured as described above is as follows.

5 is a flowchart illustrating a procedure of a method for resetting an outgoing call path during a call in case of an IP network failure of a VoIP gateway according to an exemplary embodiment of the present invention.

In addition, the configuration of the present invention is in accordance with a general VoIP communication system, as shown in FIG.

Referring to FIG. 5, while a call is connected to a VoIP communication system to make a call (S101), the state of a link is monitored (S102).

If an abnormality of the Internet is detected while monitoring the link (S013), if the condition for rerouting is met, the call is reset by the bypass path and the call is made.

That is, if a network abnormality is found, is it an abnormality due to physical disconnection of the LAN link due to a hernia cable disconnection or the like (S104), or is it a communication abnormality of the gatekeeper that cannot receive a response message such as an RCF / ACF from the gatekeeper (S105). Rerouting according to whether the gatekeeper requests the same as when the ARJ including the specified cause value is received (S106), whether the quality of the Internet network is degraded (S107), or whether the destination gateway is requested (S108). Search for the called party number of the detour route set in the table in advance (S110), call again to reset the route (S111), so that the call can be made.

In particular, in case of resetting the network quality or rerouting due to the request of the destination gateway, one or several calls may be set in advance or according to a required setting value or a cause value included in the release complete message at the destination gateway. Only the new path can be set (S109).

In addition, the monitoring of the network quality degradation includes receiving jitter value of the real-time transport protocol (RTP), received packet loss, transmission packet loss included in the received RR (receive report) packet information of the RTCP, and round trip delay. If the value is exceeded, it is regarded as a criterion judged as a request for resetting. In addition, it provides not only the network quality deterioration but also the function to judge the restoration of the network quality.

That is, even when a call is not connected, the gateway may monitor the link state in advance and request a blocking to the PBX to limit the route. Referring to FIG.

6 is a flowchart illustrating a procedure of a PBX link blocking method according to failure monitoring of a gateway in a method for resetting an originating signal path when an IP network failure of a VoIP gateway according to an embodiment of the present invention is performed.

Referring to FIG. 6, even when a call is not connected, the gateway 40 periodically monitors the inside of the link (S201), checks whether a failure occurs (S202), and if a failure occurs, the disabled due to physical disconnection of the LAN link ( (S203), the person with a disability caused by the communication error of the gatekeeper (S204) is checked, and if the LAN link failure or the gatekeeper failure is determined, the gateway 40 determines whether to block (release) the connection with the switch 20 ( In step S205, if the block is determined to be blocked, a blocking request signal is transmitted to the switch 20 (S206) to block.

In addition, blocking is not attempted unless there is a failure to connect to the Internet network 50 due to disconnection of the LAN link or abnormality of the gatekeeper.

Therefore, it is checked whether the current blocking is required (S207), and if the blocking is required, it is released to make a normal link (S208).

As described above, the gateway periodically requests a blocking at the exchange due to a call price whether the connection to the Internet network is impossible, and when the connection with the Internet network is not possible, the gateway induces a call connection through the public telephone network from the beginning.

As described above, by resetting the path by searching for a predetermined bypass path according to the condition of each path resetting, unlike a conventional network ping caused by a ping message, various failures are detected to reset the path. The call quality is improved to increase the satisfaction.

In addition, when resetting the route, a function of processing the called party's phone number is added. For example, when it is necessary to press the access code '9' for the external telephone connection, the number of the called party is set to '9'. In addition, there is no problem connecting.

As described above, the call signaling path resetting method of the Internet network failure of the IP gateway according to the present invention provides various conditions in detecting a network failure so that the administrator reconfigures the calling signaling path according to each condition. The management is more comfortable, and the subscriber is expected to increase the call quality to increase the quality satisfaction.

Claims (7)

Detecting an abnormality of the IP network during a call in a VoIP communication network system; Determining whether to re-route according to an error type of the IP network; Determining the rerouting to retrieve a rerouting table for rerouting; Connecting to a call by attempting to access a call through a bypass line designated in the rerouting table. The method of claim 1, wherein the abnormality of the IP network comprises: rerouting due to an abnormality due to physical disconnection of a LAN link; Rerouting due to a communication failure with the gatekeeper; Rerouting the gatekeeper's needs; Rerouting due to degradation of network quality; A method for resetting an outgoing signaling path in case of an IP network failure of a VoIP gateway, characterized in that rerouting can be determined by a request of a destination gateway. The method of claim 2, In the case of rerouting due to physical disconnection of the LAN link or communication failure with the gatekeeper, an outgoing signal rerouting method in case of an IP network failure of a VoIP gateway, which allows the exchanger to directly try to make an outgoing signal for resetting. . The method of claim 2, In case of resetting the network due to deterioration of network quality or a request of a called gateway, resetting of an outgoing signal path in case of an IP network failure of a VoIP gateway, resetting only an arbitrary line according to a predetermined or required designation value. . 2. The outgoing call path of the IP gateway failure of the VoIP gateway according to claim 1, wherein the bypass line of the rerouting table comprises a function of processing a called number including an access code for connecting an incoming call. How to reset. The method of claim 1, wherein if the call is not connected, Periodically monitoring the link with the Internet network at the gateway and checking whether a failure occurs; As a result of the check, a step of confirming that the disabled is unable to connect to the Internet network due to disconnection of LAN link or abnormal gatekeeper; In response to the check result, when the handicapped person cannot access the Internet network, the gateway further comprises the step of requesting blocking from the gateway to connect the outgoing call to the public telephone network. How to reset. The method of claim 6, further comprising: determining, by the gateway, that the connection with the Internet network is enabled through periodic link monitoring in a state where the blocking is requested; And determining that the connection to the Internet network is restored and transmitting a block release request signal to the exchange.