KR20030027544A - Method of transmitting voice message of VoIP service from IP network to PSTN - Google Patents

Abstract

PURPOSE: A method for transmitting a voice message of IP network transmitting and cable network receiving VoIP services is provided to store a voice message in a voice mail server installed in an IP network when a call is not connected, and to transmit the message through a cable network terminal when the call is connected, thereby resolving inconvenience of reattempting the call. CONSTITUTION: An IP phone transmitting subscriber generates a call to a cable network receiving subscriber(10). An IP phone is connected with a terminal of a cable network(12). The IP phone decides whether the receiving subscriber is in call-busy state or does not respond to the call(14). If available, the call is connected to the receiving subscriber, and if not, the transmitting subscriber decides whether to store a voice message(15). If the transmitting subscriber does not want to store the message, the call is terminated, and if not, the voice message is stored in a voice mail server(16). The IP phone inquires whether the receiving subscriber is in call-connected state(17). If so, voice mail is delivered to the terminal, and if not, the step of inquiring is returned(18).

Description

IP network outgoing wired network incoming voice message delivery method {Method of transmitting voice message of VoIP service from IP network to PSTN}

The present invention relates to a voice message delivery method when providing a VoIP service of an IP network originating wired network. More specifically, when a call is not connected with a wired network subscriber, the voice message is stored in a voice mail server installed in the IP network, and the wired network subscriber is stored. When the call state is available, the present invention relates to a method of delivering a voice message through a wired network terminal.

Considering a case where a call is received from an IP network in a VoIP (Voice over IP) service and the call is received by a wired network (PSTN), the wired network receiver, that is, the landline subscriber is busy or no answer. In case of failure, it is inconvenient to redial the phone after a certain time. There is no guarantee that the call will be retried after a certain time.

To solve this problem, a landline telephone subscriber can purchase a separate telephone with an auto answer and a message storage function, or a telephone with a caller ID function to pay and use a monthly fee for the service. You must pay a monthly fee for services such as email, telephone mail, or the Unified Messaging Service (UMS), and subscribe to your registration information on a separate form. This solution costs extra, so only a small number of people currently subscribe and use it, so most landline telephone subscribers, who are reluctant to pay extra for services, still feel uncomfortable. There is a problem in that efficient communication between the subscriber and the called subscriber of the wired network is difficult.

The present invention is to solve the above problems, in the method of delivering a voice message when providing a VoIP service of an IP network outgoing wired network, when the incoming landline telephone subscriber is busy or outgoing, the outgoing IP phone subscriber left a voice message In this case, an object of the present invention is to provide a function for receiving a voice message from an outgoing IP phone subscriber in a voice mail server of an IP network.

If voicemail server is installed in IP network, it is possible to configure network and provide service at much lower price than telephone mail service provided by wired network through voice compression and line sharing. In this way, the current inconvenience in the VoIP service of the IP network outgoing wired network can be solved, and further, the income increase of the wireline network operator and the VoIP network operator of the IP network can be expected.

In order to achieve the above object, when a call is received from the IP network and the call is received by the wired network, the subscriber of the IP network can leave an urgent voice message when the wired telephone subscriber is busy or busy. When the call becomes available, the receiver rings the called subscriber of the wired network and delivers the voice message from the calling IP phone subscriber in the voice message server.The called subscriber can receive the voice message and call the calling IP phone subscriber if desired. The method is presented.

1 is a view illustrating a configuration of an interworking network when providing a VoIP service of an IP network originating wired network call according to the present invention.

2 is a flowchart of a voice message transmission method of an IP network originating wired network incoming VoIP service according to an embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

1: MGC (Intermediate Gateway Controller) 2: MG (Intermediate Gateway)

3: SG (Signaling Gateway) 4: STP (Signal Transfer Point)

5: switch 6: SIP application server

7: voice mail server 8: service gateway

9: SCP (Service Control Point)

In order to achieve the above object, in the IP outgoing wired network incoming VoIP service, a first step in which a call to be received from the IP phone to the wired network is generated, a second step in which the IP phone is connected to the exchange of the wired network, and the called party is busy or A third step of determining whether there is no answer; if the call is available, the call is connected to the called party; otherwise, a fourth step of allowing the caller to select whether to store the message; and if the caller does not want to store the message, Terminating the call; otherwise, storing the voice message in a voice mail server on the Internet; a sixth step of inquiring whether the called party is in a callable state; and, if the called party is available, the called party's wired network terminal. A seventh step of sending out the voicemail, and otherwise returning to the sixth step It characterized.

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

1 is a block diagram of an interworking network when providing a VoIP service of an IP network originating wired network according to the present invention. When an IP phone that is a Session Initiation Protocol (SIP) terminal requests call initiation to MGC (Media Gateway Controller: 1), MGC (1) sends an IP phone using MG (Media Gateway: 2) using H.248 / MEGACO protocol. Request bearer allocation between MG (2) and MG (2). The MGC 1 transfers an ISUP (ISDN User Part) message to the exchange 5 through an SG (Signaling Gateway: 3) and a wired STP (Signaling Transfer Point: 4) to the exchange 5 so that the MG 2 and the exchange 5 Request bearer assignment and try to connect IP phone and landline. In this case, communication between the IP phone and the MGC 1 uses a SIP protocol, communication between the IP phone and the MG 2 uses an RTP / RTCP protocol, and the MGC 1 and the SG 3 ) May use the SIGTRAN protocol, communication between the MG 2 and the switch 5 may use an E1 interface, and communication between the SG 3 and the STP 4 may use an SS7 protocol. .

The outgoing IP phone subscriber has the option to leave a voice message when the landline telephone subscriber is busy or away at the exchange 5. Preferably, the method of selecting an option may be a method in which an IP phone subscriber presses a special key. The optional function is made by the SIP application server 6 of the IP network, and the SIP application server 6 stores the voice message of the originating IP phone subscriber in the voicemail server 7 constructed in the IP network. The SIP application server 6 requests the intelligent network SCP (Service Control Server) 9 of the wired network to notify the SIP application server 6 of the IP network if the subscriber of the wired network is available. For example, if you are on a call, watch the on-hook, and if you are on the go, watch the change from the off-hook state to the on-hook state, or try to deliver a voice message after several times have passed. It is also possible. The trigger of the called subscriber is set in the switch 5 of the wired network, and when it is determined that the called subscriber of the wired network is in a callable state, the switch 5 of the wired network notifies SCP 9 of the wired network, and SCP (9) Is again notified to the SIP application via the service gateway 8 of the IP network. At this time, preferably, the INAP protocol is used between the SCP 9 and the service gateway 8, the SPIRITS protocol is used between the service gateway 8 and the SIP application server 6, and the service gateway 8 uses the protocol. Mapping function can be performed. Upon receiving the notification, the SIP application server 6 rings the called subscriber of the wired network via the MGC 1, SG 3, STP 4, and the exchange 5, and when the called subscriber receives a call, the SIP application server (6) forwards the voice message from the originating IP phone subscriber stored in the voicemail server 7 via the MGC 1, MG 2, and exchange 5. The called party of the wired network has the option to automatically dial the calling IP phone subscriber if desired after receiving the voice message.

2 is a flowchart illustrating a voice message transmission method of an IP network originating wired network incoming VoIP service according to an exemplary embodiment of the present invention.

First, a first step is generated in which an incoming call from the IP phone to the wired network occurs. That is, the IP phone subscriber tries to talk to the subscriber of the wired network.

Next, the IP phone and the terminal of the wired network are connected to the second step. The connection between the IP phone and the wired network is performed by the MGC (1) assigning a bearer between the IP phone and the MG (2), and delivering an ISUP message to the exchange via the SG (3) and the STP (4). 5) is made by requesting bearer allocation.

Next, there is a third step of determining whether the called party is busy or unanswered. This determination is made at the exchange.

Next, if the call is available, the call is connected to the called party. Otherwise, the call is sent to the caller to select whether to store the message. When a call is possible, the call is made in the same manner as in the case of a general telephone call. In the case of a busy or no answer, the IP phone subscriber may select to store a voice mail. Preferably, the selection may be performed by the IP phone subscriber by pressing a special key of the IP phone.

Next, if the caller does not want to store the message, the call is terminated. If not, the fifth step is to store the voice message in a voice mail server on the Internet. The voice message is stored in the voice mail server 7 by the SIP application server 6 installed in the IP network.

Once the message is stored, a sixth step is queried to determine if the called party is in a callable state. This inquiry is made by the SIP application server 6 requesting SCP 9, a wired network intelligent network, to notify the SIP application of a call availability status. If the subscriber of the wired network is determined to be available for call, the switch 5 of the wired network notifies SCP 9 of the wired network, and SCP 9 again notifies the SIP application via the service gateway 8 of the IP network. . In this case, preferably, the INAP protocol is used between the SCP 9 and the service gateway 8, and the SPIRITS protocol is used between the service gateway 8 and the SIP application server 6, and the service gateway 8 uses the above-described protocol. Mapping between protocols can be performed.

If it is determined that the wired network subscriber is available, the voice mail is sent to the wired network terminal of the called party, and if not, the voice mail is returned to the sixth step. In this case, preferably, the called subscriber of the wired network has an option of automatically connecting a call to the calling IP phone after receiving a voice message.

As described above, according to the present invention, a voice message delivery method of an IP network outgoing wired network incoming VoIP service is provided to a voice message server when the outgoing IP phone subscriber leaves a voice message when the incoming landline telephone subscriber is busy or busy. It can receive voice messages from subscribers of outgoing IP phones, which can reduce the inconvenience of IP phone users retrying calls, and can increase the profits of wired network operators and IP network VoIP operators. .

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 scope of the claims You will have to look.

Claims (8)

In the IP outgoing wired network incoming VoIP service, A first step in which the calling subscriber of the IP phone issues a call to the called subscriber of the wired network; A second step of connecting the IP phone to the terminal of the wired network; Determining whether the called subscriber of the wired network is busy or unanswered; A fourth step of, if the call is available, the call is connected to the called party of the wired network, and if not, the call subscriber of the IP phone selects whether to store the voice message; Terminating the call if the caller does not want to store the message; otherwise, storing the voice message in a voicemail server on an IP network; A sixth step of inquiring whether the called subscriber of the wired network is in a callable state; And And a seventh step of transmitting the voicemail to the wired network terminal of the called subscriber of the wired network when the called subscriber of the wired network is available for calling, and otherwise returning to the sixth step. Voice message delivery method of outgoing wired network incoming VoIP service. The method of claim 1, After the voice message is transmitted in the seventh step, the method further comprises the eighth step of automatically connecting to the calling subscriber of the IP phone if the called subscriber of the wired network is desired. . The method of claim 1 or 2, wherein the second step, The connection between the IP phone and the terminal of the wired network is performed by the MGC requesting bearer allocation of the MG and the exchange period by allocating a bearer allocation between the IP phone and the MG and transferring an ISUP message to the exchange via SG and STP. A voice message transmission method of IP outgoing wired network incoming VoIP service, characterized in that. The method of claim 3, wherein The communication between the IP phone and the MGC uses a SIP protocol, the communication between the MGC and the MG uses an H.248 / MEGACO protocol, the communication between the IP phone and the MG uses an RTP / RTCP protocol, The communication between the MGC and the SG uses the SIGTRAN protocol, the communication between the MG and the exchange uses the E1 interface, and the communication between the SG and the STP uses the SS7 protocol. Voice service delivery method of service. The method according to claim 1 or 2, The voice message storage selection of the fourth step is performed by the IP phone originating subscriber by pressing a special key of the IP phone. The method according to claim 1 or 2, In the sixth step, the call availability status monitor monitors the on-hook when the call is busy, and monitors the change from the off-hook state to the on-hook state when the call is in progress. Voice message delivery method. The method according to claim 1 or 2, The call state inquiry of the sixth step requests the SIP application server to notify the SIP application server of the callable state of the called subscriber of the wired network to the SCP of the wired network, and when the called subscriber becomes available, A voice message delivery method of an IP originating wired network incoming VoIP service, comprising: a method of notifying an application server. The method of claim 7, wherein The communication between the SCP and the service gateway uses an INAP protocol, the communication between the service gateway and the SIP application server uses a SPIRITS protocol, and the service gateway performs a mapping function between the protocols. A voice message transmission method of a wired network incoming VoIP service.