KR101889075B1 - System and method for dualization call processing of direct inward dialing in internet telephony - Google Patents

Abstract

The present invention relates to a DID duplicated call processing system and method in an Internet telephone, and more particularly, to a DID duplicated call processing system and method in an Internet telephone, When a failure occurs between call processing devices, an incoming call is bypassed through an alternative path, and the call is handled by a subscriber private branch exchange. Thus, an incoming call for DID (Direct Inward Dialing) can be stably received to a subscriber terminal through a VoIP- have.

Description

TECHNICAL FIELD [0001] The present invention relates to a DID duplicated call processing system and a method thereof,

The present invention relates to a DID duplicated call processing system and method in an Internet telephone, and more particularly, to a DID duplicated call processing system and method in an Internet telephone, When a failure occurs between call processing devices, an incoming call is bypassed through an alternative path, and the call is handled by a subscriber private branch exchange. Thus, an incoming call for DID (Direct Inward Dialing) can be stably received to a subscriber terminal through a VoIP- The present invention relates to a DID duplicated call processing system and method thereof in an Internet telephone.

A VoIP network that can be used over the Internet (IP network) is gradually expanding. The VoIP network compresses the voice signal, converts it into a digital signal, divides it into a packet form, and transmits it through an IP-based VoIP network. In the VoIP network, various multimedia services are added in addition to simple telephone functions. For example, various additional services such as a voice call function between an Internet terminal or a PSTN terminal, a unified messaging service for integrating and converting e-mail, fax, and voice, a web call center, and a video conference are added.

Meanwhile, a DID (Direct Inward Dialing) service is provided in VoIP (Voice over Internet Protocol) to directly connect incoming calls to VoIP call processing devices (for example, soft switches) and intra-premises equipment such as IP-PBXs via the Internet network. Here, the DID service means a service in which an incoming call to a subscriber's telephone of a private branch exchange is automatically connected to a designated extension telephone line without going through a relay line in a terminology and a method used in a legacy exchange. In other words, when a user wants to communicate with an IP terminal connected to a private branch exchange from outside, it is a circuit configured to be able to directly call without going through an intra-city relay.

However, the VoIP call processing device in the conventional VoIP network and the interworking method between the IP-PBX or the gateway of the enterprise subscriber are connected by a simple peering structure. In such a peering structure, when a line failure occurs between the VoIP call processing device and the IP-PBX of the enterprise subscriber, or when the VoIP call processing device fails, the DID service is disconnected and the enterprise subscriber can not receive the incoming call.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a subscriber- The DID duplication in the Internet telephone, which can reliably receive the incoming call for DID (direct inward dialing) to the subscriber terminal through the subscriber private branch exchange based on VoIP, by processing the call to the subscriber private exchange by bypassing the incoming call through the VoIP- And to provide a call processing system and a method thereof.

To this end, the apparatus according to the first aspect of the present invention comprises: a route setting unit for setting a direct route for processing a subscriber call in a subscriber private branch exchange and setting an alternative route to another subscriber call processing apparatus; A subscriber disturbance detection unit for detecting whether a line failure occurs in a subscriber interval with the subscriber private branch exchange; And a subscriber call processing unit for processing a call through the direct path for processing the established subscriber's incoming call processing and processing a call to the subscriber private branch exchange through an alternative path for processing the set subscriber call when a line failure occurs in a subscriber section with the subscriber private branch exchange .

The subscriber disturbance detection unit monitors the interworking state of the subscriber private branch exchange using a SIP (Session Initiation Protocol) option message and determines whether a line failure has occurred according to the monitoring result.

According to a second aspect of the present invention, there is provided an apparatus comprising: a route setting unit setting a plurality of subscriber call processing apparatuses and a direct path and an alternative path for relay processing, respectively; A relay failure detection unit for detecting whether a failure occurs between subscriber call processing devices that perform call processing through the direct path; And a relay call processing unit for performing call processing through the established relay path for the established relay path in case of a failure between subscriber call processing apparatuses performing call processing through the direct path for the relay processing and performing call processing through the direct path, do.

Wherein the relay failure detection unit detects a failure between the subscriber call processing apparatuses when receiving a server error message in response to the relaying signaling message after transmitting the relaying signaling message to the plurality of subscriber call processing apparatuses .

According to a third aspect of the present invention, there is provided a method comprising: a routing step in which a subscriber call processing apparatus sets up a direct path for processing a subscriber call in a subscriber private branch exchange, and sets an alternative path to another subscriber call processing apparatus; A normal call processing step of performing call processing through the direct path for the established subscriber's incoming call processing; A subscriber failure detection step of detecting whether a line failure occurs in a subscriber interval with the subscriber private branch exchange; And a failure call processing step of performing call processing to the subscriber private branch exchange through an alternative path for processing the established subscriber call when a line failure occurs in a subscriber interval with the subscriber private branch exchange.

The subscriber disturbance sensing step monitors the interworking state of the subscriber private branch exchange using a SIP option message and determines whether a line failure has occurred according to the monitoring result.

According to a fourth aspect of the present invention, there is provided a method comprising: a routing step of setting a plurality of subscriber call processing apparatuses and a direct path and an alternative path for relay processing, respectively; A normal call processing step of performing call processing through the set direct path for relay processing; A relay failure detection step of detecting whether a failure occurs between subscriber call processing devices that perform call processing through the set direct path; And a failure call processing step of performing a call processing through the set relay path for a failure between a subscriber call processing device that processes a call through the direct path and a subscriber call processing device that performs call processing through the direct path.

Wherein the relay failure detection step includes a step of transmitting a relaying signaling message to the plurality of subscriber call processing devices and receiving a server error message in response to the relaying signaling message, .

The present invention relates to a subscriber premises switching system in which a subscriber call processing apparatus located between a relay call processing apparatus and a subscriber private branch exchange has a redundant configuration and bypasses an incoming call through an alternative path when a line failure occurs in a subscriber section or a failure occurs in a network call processing apparatus, It is possible to stably receive an incoming call for direct inward dialing (DID) to a subscriber terminal through a VoIP-based subscriber private branch exchange.

The present invention has the effect of providing stable availability and stability of enterprise call receiving service through provision of IP-PBX or gateway for VoIP processing enterprise subscriber and class 5 class call processing equipment and redundant configuration.

In addition, the present invention has an effect of minimizing the VoIP-based DID service disconnection through the redundancy configuration of the subscriber call processing device located between the relay call processing device and the subscriber private switching center.

1 is a block diagram of an embodiment of a DID duplicated call processing system in an Internet telephone according to the present invention;
FIG. 2 is a detailed configuration diagram of an embodiment of a subscriber call processing apparatus of FIG. 1 according to the present invention;
FIG. 3 is a detailed configuration diagram of an embodiment of a relay call processing apparatus of FIG. 1 according to the present invention;
4 is a diagram illustrating an embodiment of a DID duplicated call processing method in a subscriber section line failure according to the present invention.
5 is a diagram for explaining an embodiment of a DID duplicated call processing method in case of failure between network communication devices according to the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The configuration of the present invention and the operation and effect thereof will be clearly understood through the following detailed description. Before describing the present invention in detail, the same components are denoted by the same reference symbols as possible even if they are displayed on different drawings. In the case where it is judged that the gist of the present invention may be blurred to a known configuration, do.

1 is a block diagram of a DID duplicated call processing system in an Internet telephone according to an embodiment of the present invention.

1, the DID duplicated call processing system 100 in the Internet telephone according to the present invention includes a relay call processing unit 110, a plurality of subscriber call processing units 121 and 122, and a subscriber private branch exchange 130 ). For example, it is assumed that a plurality of subscriber call processing devices 121 and 122 include a first subscriber call processing device 121 and a second subscriber call processing device 122 for a DID duplication configuration. However, the DID duplicated call processing system 100 may include a plurality of subscriber call processing devices for multiplexing as well as duplication.

Hereinafter, each of the components of the DID duplicated call processing system 100 in the Internet telephone according to the present invention will be described.

The subscriber private branch exchange 130 receives the VoIP-based incoming call to the subscriber terminal 140. Here, the subscriber terminal 140 is a VoIP-based Internet phone terminal used by subscribers in the premises. The subscriber terminal 140 receives signaling of an incoming call by another external subscriber terminal through call processing in the subscriber private branch exchange 130. [ When the subscriber terminal 140 responds to the signaling, the call route is opened. The subscriber private branch exchange 130 may be an IP-PBX or a gateway, which is an IP-based exchange.

The subscriber private branch exchange 130 has a peering interworking structure with a plurality of subscriber call processing devices 121 and 122, respectively, in order to circumvent a line failure occurring in the subscriber interval in the incoming call signaling. The subscriber private switching center 130 authenticates the IP address and the port number without a separate registration process in the peering interworking structure and performs peering with the plurality of subscriber call processing devices 121 and 122. In addition, the subscriber private branch exchange 130 may be configured to have an active / active structure based on a Session Initiation Protocol (SIP) connection or a Primary / Secondary Registration so that a plurality of subscriber- (121 and 122).

The first subscriber call processing device 121 of the plurality of subscriber call processing devices sets the direct route for subscriber call processing in the subscriber private branch exchange 130 and transmits the direct route to the second subscriber call processing device 122, (Alternative Route). For example, a plurality of subscriber call processing apparatuses may be comprised of class 5 system call processing apparatuses.

Referring to the call processing process, the first subscriber call processing device 121 processes a call through a direct path for subscriber incoming call processing. The first subscriber call processing device 121 transmits a signaling message through a direct path for subscriber inbound call processing. The signaling message includes information for all non-voice calls, such as caller phone number, recipient phone number, codec, IP address, and the like. The signaling message may be transmitted in various ways such as SIP, H.323, MGCP, and SCCP, and is not limited to a specific transmission scheme. Thereafter, when a line failure occurs in a subscriber interval with the subscriber private branch exchange 130, the first subscriber call processing device 121 performs call processing to the subscriber private branch exchange 130 through an alternative path for processing a subscriber call. Here, the second subscriber call processing device 122 is used for backup processing in the alternative path for backup in case of a line failure between the first subscriber call processing device 121 and the subscriber private branch exchange 130. [

The relay call processing device 110 sets up a plurality of subscriber call processing devices 121 and 122 and a direct path and an alternative path for relay processing, respectively. For example, the relay call processing device 110 may be a class-4 call processing device. Then, the relay call processing device 110 performs call processing of the incoming call transmitted by the caller terminal through the relay path direct path. In the event of a failure between subscriber call processing devices that perform call processing through a direct path, the relay call processing device 110 bypasses the direct path for relay processing and performs call processing through an alternative path for relay processing.

2 is a detailed configuration diagram of an embodiment of a subscriber call processing apparatus of FIG. 1 according to the present invention.

As shown in FIG. 2, the first subscriber call processing apparatus 121 of FIG. 1 according to the present invention includes a path setting unit 210, a failure detection unit 220, and a subscriber call processing unit 230. Here, for convenience of explanation, the configuration of the first subscriber call processor 121 will be described, but the configuration of the second subscriber call processor 122 is also applied as described below.

The path description unit 210 establishes a direct path for subscriber call processing to the subscriber private branch exchange 130 and sets up an alternative path to the second subscriber call processing apparatus 122. [

The failure detection unit 220 detects whether a line failure occurs in a subscriber interval with the subscriber private branch exchange 130. [ Specifically, the failure detection unit 220 detects the interworking state of the subscriber private branch exchange 130 using a SIP (Session Initiation Protocol) option message. The failure detection unit 220 determines whether or not the line failure has occurred based on the monitoring result. The failure detection unit 220 transmits the failure of the line to the subscriber call processing unit 230.

The subscriber call processing unit 230 processes the call through the direct path for the subscriber inbound call processing set in the path description unit 210. Then, the subscriber call processing unit 230 receives the line failure from the failure detection unit 220 in the subscriber section with the subscriber's private branch exchange 130. When a line failure occurs, the subscriber call processing unit 230 calls the subscriber private branch exchange 130 through the alternative path for subscriber call processing so as to bypass the direct path for subscriber call processing.

In addition, the subscriber call processing unit 230 monitors whether the incoming call is looped between a plurality of subscriber call processing devices. The subscriber call processing unit 230 calls the looped incoming call to the subscriber's private branch exchange 130 to prevent looping when the looping occurs.

3 is a detailed configuration diagram of an embodiment of the relay call processing device of FIG. 1 according to the present invention.

As shown in FIG. 3, the path setting unit 310 sets the direct path and the substitute path for the relay processing to the first subscriber call processing device 121 and the second subscriber call processing device 122, respectively.

The failure detection unit 320 detects whether a failure occurs between the first subscriber call processing devices 121 that perform call processing through the direct path set in the path setting unit 310. [ When the failure detection unit 320 receives the server error message in response to the relaying signaling message after transmitting the relaying signaling message to the first subscriber call processing unit 121, 121). In addition, the failure detection unit 320 monitors whether or not a failure occurs in the first subscriber call processing device, and determines that the failure has occurred between the first subscriber processing devices 121 according to the failure monitoring result.

The relay call processing unit 330 performs call processing through the direct path for relay processing set by the path setting unit 310. [ At this time, the relay call processing unit 330 receives from the failure detection unit 320 whether or not a failure occurs between the first subscriber call processing units 121 that perform call processing through the direct path. When a failure occurs between the first subscriber call processing units 121, the relay call processing unit 330 performs call processing through the relay path for relay processing set in the path setting unit 310 to bypass the direct path.

4 is an explanatory diagram of an embodiment of a DID duplicated call processing method in a subscriber section line failure according to the present invention.

As shown in FIG. 4, a line failure occurs between the first subscriber call processing device 121 and the subscriber terminal 130. Hereinafter, a process of bypassing to the second subscriber call processing device 122 and performing call processing to the subscriber private branch exchange 130 will be described as follows.

First, the relay call processing device 110 receives an incoming call to be received by the subscriber terminal 140 from a caller terminal (not shown in the figure) that transmits the incoming call to the subscriber terminal 140 via the VoIP network.

Then, the relay call processing device 110 performs call processing of the incoming call to the first subscriber call processing device 121 through the relay processing direct path 401.

Then, the first subscriber call processing unit 121 calls the called party, which has been call-processed from the relay call processing unit 110, to the subscriber private branch exchange 130 through the subscriber direct path 411. At this time, the first subscriber call processing device 121 monitors the line failure of the subscriber direct path 411 in the subscriber section.

When a line failure 400 occurs as a result of the line failure monitoring, the first subscriber call processing device 121 performs a second subscriber call processing (i.e., a second subscriber call processing) through the alternate path for subscriber processing 412, Device 122 to bypass the incoming call.

The second subscriber call processing device 122 calls the called subscriber call processing from the first subscriber call processing device 121 to the subscriber private branch exchange 130 through the subscriber direct path 421.

The subscriber's private branch exchange 130 receives the incoming call through the second subscriber call processing device 122 and notifies the subscriber terminal 140 of the received incoming call even when a line failure occurs.

5 is a diagram for explaining an embodiment of a DID duplicated call processing method in case of failure between network communication devices according to the present invention.

As shown in FIG. 5, a line failure occurs between the relay call processing device 110 and the first subscriber call processing device 121. Hereinafter, a process of bypassing to the second subscriber call processing device 122 and performing call processing to the subscriber private branch exchange 130 will be described as follows.

First, the relay call processing device 110 receives an incoming call to be received by the subscriber terminal 140 from a caller terminal (not shown in the figure) that transmits the incoming call to the subscriber terminal 140 via the VoIP network.

Then, the relay call processing device 110 performs call processing of the incoming call to the first subscriber call processing device 121 through the relay processing direct path 401.

At this time, the relay call processing device 110 monitors the failure of the direct path 401 between the call processing devices in the network.

When a failure 500 occurs between the network call processing apparatuses as a result of the failure monitoring, the relay call processing apparatus 110 notifies the second subscriber call processing unit 122 of the second subscriber call And causes the processing apparatus 122 to bypass the incoming call.

Then, the second subscriber call processing device 122 transmits an incoming call processed through the relay processing alternative path 501 from the relay call processing device 110 to the subscriber private branch exchange 130 via the subscriber direct path 421 Call processing.

The relay call processing device 110 bypasses the incoming call through the second subscriber call processing device 122 even when a failure occurs between the call processing devices within the network. This is for the subscriber private branch exchange 130 to forward the incoming call to the subscriber terminal 140.

If a line failure occurs in the subscriber direct path 421, the second subscriber call processing device 122 bypasses the incoming call through the alternate path 511 for the subscriber processing set up with the first subscriber call processing device 121 . The detached incoming call is processed by the subscriber private branch exchange 130 through the first subscriber call processing device 121.

As described above, the DID duplicated call processing system 100 includes a VoIP-based subscriber private branch exchange 130 and a peer-to-peer call processing device, and is constructed in such a manner that a plurality of It can provide availability and stability of call reception service by providing network call processing device and redundant configuration.

The foregoing description is merely illustrative of the present invention, and various modifications may be made by those skilled in the art without departing from the spirit of the present invention. Accordingly, the embodiments disclosed in the specification of the present invention are not intended to limit the present invention. The scope of the present invention should be construed according to the following claims, and all the techniques within the scope of equivalents should be construed as being included in the scope of the present invention.

The present invention relates to a subscriber subscriber switching system and a subscriber subscriber switching apparatus, which are located between a relay call processing apparatus and a subscriber private switching apparatus, through a redundant configuration, bypassing an incoming call through an alternative path when a line failure occurs in a subscriber section, Call processing, it is possible to stably receive an incoming call for direct inward dialing (DID) to a subscriber terminal through a VoIP-based subscriber private branch exchange. In this respect, it is not only the use of the related technology but also the possibility of commercialization or operation of the applied device, as it exceeds the limit of the existing technology.

100: DID duplication call processing system 110: Relay call processing device
120: subscriber call processing device 130: subscriber private branch exchange
210: path setting unit 220: subscriber fault detection unit
230: subscriber call processing unit 310: path setting unit
320: Relay failure detection unit 330: Relay call processing unit

Claims (8)

A subscriber call processing apparatus comprising:
A subscriber terminal connected to the subscriber terminal for setting up a direct path for connecting the subscriber terminal to the subscriber terminal and a subscriber private switching center for signaling an incoming call to the subscriber terminal, A path setting unit for setting an alternative path for connecting up to an exchange;
A subscriber disturbance detecting unit for detecting whether a line fault occurs in the direct path; And
Wherein if the subscriber fault detection unit detects that the line fault has not occurred in the direct path, the control unit controls the call processing through the direct path, and if the subscriber fault detection unit detects that the line fault has occurred in the direct path, And a subscriber call processing unit for controlling the call processing through the alternative path
Subscriber call processing device. The method according to claim 1,
Wherein the subscriber disturbance detection unit comprises:
Monitors the interworking state of the subscriber private branch exchange using a SIP (Session Initiation Protocol) option message, and judges whether or not a line failure has occurred according to the monitoring result
Subscriber call processing device in Internet telephony. delete delete A duplicated call processing method performed in a subscriber call processing apparatus,
The method comprising the steps of: establishing a direct path connecting a subscriber terminal to a subscriber private switchboard for signaling an incoming call to the subscriber terminal,
Setting an alternate path for connecting the subscriber station to the subscriber private branch exchange via the alternate subscriber call processing apparatus from the subscriber call processing apparatus;
Detecting whether a line fault occurs in the direct path,
Controlling the call processing through the direct path if it is detected that the line fault has not occurred in the direct path and controlling the call processing through the alternative path if it is detected that the line fault has occurred in the direct path
Duplicated call processing method. 6. The method of claim 5,
The step of detecting whether or not the line fault has occurred comprises:
Monitoring the interworking state of the subscriber private branch exchange using a SIP option message, and judging whether or not a line failure has occurred according to the monitoring result
Duplicated call processing method. delete delete

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