JP2002290550A - Voice gateway apparatus, processing method therefor and program thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a voice gateway apparatus, a processing method therefor and a program thereof, which are intended to reduce the call connection time by controlling trouble information of a plurality of other voice gateway apparatus to be the communication parties. SOLUTION: The voice gateway apparatus 1 comprises a DSP part 11, having a voice compressor 111 and a select number processor 112, exchange interface 12, packet controller 13, controller 14, memory 15 having a state control table 151, and response timer 16. The voice gateway apparatus 1 (at the origination side) periodically checks for trouble information of a plurality of gateway apparatus to be at the termination side and stores them in the state control table 151 in advance. It references this table 151 at origination to control, so that a voice gateway apparatus having trouble is not selected as a communication party, thus reducing the call connection time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voice gateway device for performing voice communication via an IP network, a processing method therefor, and a program therefor, and more particularly to a voice gateway device for shortening a call connection time when a failure occurs, and a processing method therefor. And its programs.

[0002]

2. Description of the Related Art A conventional voice gateway device will be described below with reference to the drawings. FIG. 8 shows an operation at the time of a call connection when a failure occurs in a network using a conventional voice gateway device, and FIG. 9 shows a processing sequence thereof.

[0003] In FIG. 8, a conventional network using a voice gateway device includes a voice gateway device 100 connected to an IP network 400 and other voice gateway devices 500a and 500b. The telephone 300 via the telephone exchange 200
Are connected, and the voice gateway devices 500a and 500b
Is connected to a telephone 700 via a telephone exchange 600.

When a telephone call is made from telephone 300 to telephone 700, telephone 300 sends a selection number corresponding to telephone 700 to telephone exchange 200 after going off-hook. This selection number reaches the voice gateway device 100 via the telephone exchange 200 after the activation signal. The voice gateway device 100 refers to the setting table 800 in which the selection order is stored, and selects the voice gateway device 500a as the first route as the first selection order.

[0005] The voice gateway device 100 is connected to the IP network 4
A call connection request signal is sent to the voice gateway device 500a via the "00". When a failure (*) occurs in the middle of the trunk line as shown in FIG. Does not reach the voice gateway device 500a (broken line 1 in FIG. 8). Therefore, as shown in FIG. 9, the voice gateway device 100 detects a paging signal timeout without the paging signal arriving within a predetermined time.

Next, the voice gateway device 100 refers to the setting table 800 in which the selection order is stored, and
As a selection order, the voice gateway device 500b, which is the second route, is selected, and a call connection request signal is transmitted to the voice gateway device 500b via the IP network 400 (FIG. 8).
Broken line 2). This call connection request signal reaches the voice gateway device 500b,
Transmits a selected number to the telephone exchange 600 and transmits a call signal to the voice gateway device 100 (broken line 3 in FIG. 8). The telephone exchange 600 rings the telephone 700 based on the selection number received from the voice gateway device 500b.

[0007]

However, in the voice gateway device shown in the above-mentioned conventional example, when there are a plurality of other voice gateway devices to be communicated with, the first selection order set in the setting table is set. In the case of a communication route failure or a failure in the voice gateway device itself, there is a problem that the call connection time is increased by the time-out period of the call signal.

[0008] The present invention provides a voice gateway device that realizes a reduction in call connection time by periodically managing fault information of a plurality of other voice gateway devices as communication partners, a processing method thereof, and a program therefor. The purpose is to provide.

[0009]

In order to solve the above-mentioned problems, the invention according to claim 1 is based on IP (Internet Protocol).
A voice gateway device for performing voice communication via a network, wherein the call connection is controlled in accordance with the state of a plurality of other voice gateway devices connected via an IP network.

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided a transmitting means for transmitting a status confirmation signal to another plurality of voice gateway devices, and a status confirmation from the other plurality of voice gateway devices. Receiving means for receiving a response signal to the signal.

According to a third aspect of the present invention, in the second aspect of the present invention, detecting means for detecting a reception time-out of a response signal received by the receiving means and presence or absence of a response signal receiving time-out by the detecting means as failure information. Management means for managing.

According to a fourth aspect of the present invention, in the third aspect of the present invention, a call for making a call connection only to another voice gateway apparatus in which no failure is detected with reference to the failure information managed by the management means. It has a connection means.

According to a fifth aspect of the present invention, an IP (Internet Pr
otocol) A method for processing a voice gateway device performing voice communication via a network, comprising: a transmitting step of transmitting a status confirmation signal to a plurality of other voice gateway devices connected via an IP network; Receiving a response signal to a status confirmation signal from a plurality of voice gateway devices.

According to a sixth aspect of the present invention, in the fifth aspect of the invention, a detecting step of detecting a reception timeout of a response signal received in the receiving step, and determining whether or not there is a timeout of the response signal in the detecting step. And a management step of managing as

According to a seventh aspect of the present invention, in the sixth aspect of the present invention, a call for making a call connection only to another voice gateway apparatus in which no failure is detected with reference to the failure information managed by the management step. It has a connection step.

The invention according to claim 8 is an IP (Internet Prism).
otocol) A program for a voice gateway device that performs voice communication via a network,
A transmission process of transmitting a status confirmation signal to another plurality of voice gateway devices connected via the P network, a reception process of receiving a response signal to a status confirmation signal from the other plurality of voice gateway devices, Is executed.

According to a ninth aspect of the present invention, in the invention of the eighth aspect, the voice gateway device has a detection process of detecting a reception timeout of a response signal received in the reception process, and a reception timeout of the response signal by the detection process. And management processing for managing the presence / absence as failure information.

According to a tenth aspect of the present invention, in the ninth aspect of the present invention, the voice gateway device refers to the fault information managed by the management processing with respect to another voice gateway device in which no fault is detected. It is characterized in that a call connection process for making only a call connection is executed.

<Operation> By periodically managing the failure information of a plurality of voice gateway devices as communication partners, if a failure occurs, the calling-side voice gateway device generates a call signal timeout when a call is connected. Is not selected as the communication partner, so that the call connection time can be reduced.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a voice gateway device, a processing method thereof, and a program thereof according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. 1 to 7 show an embodiment of a voice gateway device, a processing method thereof, and a program thereof according to the present invention.

FIG. 1 is a block diagram showing a schematic configuration of a voice gateway device according to an embodiment of the present invention. Figure 1
In the embodiment, the voice gateway device 1 according to the embodiment of the present invention includes a DSP unit 11 and an exchange interface unit 12.
, A packet control unit 13, a control unit 14, and a memory unit 1.
5 and a response timer 16.

The voice gateway device 1 according to the embodiment of the present invention is connected to a telephone exchange 2 and a telephone 3 via an exchange interface unit 12 and a packet control unit 13.
Is connected to the IP network 4 via.

DSP (Digital Signal Processor) unit 11
Is a voice compression processing unit 111 for encoding PCM voice data input from the telephone exchange 2 or decoding voice-compressed data into PCM voice data, and a selection unit for detecting and transmitting a selection number from the telephone exchange 2. Number processing unit 112
And is configured.

The exchange interface section 12 detects an activation signal from the telephone exchange 2 and transmits an incoming signal.

The packet control unit 13 decomposes and assembles a call control packet, a voice packet, a status confirmation packet, and a response packet with respect to the IP network 4, and transmits and receives each packet.

The control section 14 reads out a control program stored in the memory section 15 and controls the operation of each component in the voice gateway device 1 based on the control program.

The memory unit 15 has a state management table 151 in which information on the presence / absence of a failure is described for each of a plurality of other voice gateway devices based on the presence / absence of a timeout of a response signal to the state confirmation signal.
The control program of the voice gateway device 1 is stored.

The response timer 16 detects a timeout of the response signal when the response signal is not returned after the transmission of the status confirmation signal.

FIGS. 2A and 2B are diagrams showing an operation for detecting the presence / absence of a failure in the voice gateway device of the communication partner. FIG. 2A shows a case where there is no failure, and FIG. 2B shows a case where there is a failure. .

Referring to FIG. 2A, a case where the communication destination voice gateway apparatus has no failure will be described below.
In FIG. 2A, first, the control unit 14
5, a command to send a status confirmation packet to the voice gateway device described in the status management table 151 is sent to the packet control unit 13 (broken line 1), and at the same time, a command to start the time counting operation of the response timer 16 is issued. Send (broken line 2).

When the response timer 16 receives the response signal from the voice gateway device of the communication partner by the packet controller 13 before detecting the timeout of the response signal, the response signal is received from the packet controller 13 to the controller 16. To the effect (broken line 3). The control unit 14 stops the time counting operation to the response timer 16 and sends a command to clear the count value (broken line 4). When the count value of the response timer 16 is cleared, the state management table of the memory unit 15 is cleared. A command describing "no fault" is sent to the voice gateway device of the communication destination stored in 151 (broken line 5).

Referring to FIG. 2B, the case where the voice gateway device of the communication partner has a failure will be described below.
In FIG. 2B, first, the control unit 14
5, a command to send a status confirmation packet to the voice gateway device described in the status management table 151 is sent to the packet control unit 13 (broken line 6), and at the same time, a command to start the time counting operation of the response timer 16 is issued. Send (dashed line 7).

If the packet control unit 14 detects a timeout by the time counting operation of the response timer 16 before receiving the response signal from the voice gateway device of the communication partner, the control unit 14 notifies that the timeout has been detected.
(Broken line 8). The control unit 14 stops the time counting operation to the response timer 16 and sends a command to clear the count value (broken line 9), and when the count value of the response timer 16 is cleared, the state management table of the memory unit 15 151 is sent to the destination voice gateway device stored in the communication destination 151 (broken line 1).
0).

FIG. 3 is a diagram showing an operation example at the time of call connection using the voice gateway device according to the embodiment of the present invention. In FIG. 3, when the telephone 3 makes a call via the telephone exchange 2, the voice gateway device 1, and the IP network 4, the telephone 3 sends the selected number of the other party to the telephone exchange 2 after going off-hook (broken line 1). . This selection number reaches the voice gateway device 1 via the telephone exchange 2 after the activation signal (broken line 2).

The selection number is detected by the selection number processing section 11 in the DSP section 11 via the exchange interface section 12 (broken line 3) and transferred to the control section 14 (broken line 4). The control unit 14 refers to the state management table 151 stored in the memory unit 15 (broken line 5), and selects the voice gateway device described as “no failure”. When a plurality of voice gateway devices are described as “no failure” in the state management table 151, a voice gateway device to be a communication partner is selected based on preset priority information.

Next, the control unit 14 transfers a call connection request signal for a voice gateway device in which no failure has occurred to the packet control unit 13 (broken line 6). The packet control unit 13 receives a call connection request signal from the control unit 14
A call connection request packet is generated and transferred to the IP network 4 (broken line 7).

As described above, when a failure occurs in the communication path to the voice gateway device of the communication partner or a failure (such as a failure) of the voice gateway device itself, a call connection is made to the voice gateway device. Since such control is not performed, the call connection time can be shortened.

FIG. 4 shows a processing sequence when a response timeout has not occurred. Referring to FIG. 4, the voice gateway device 1 transmits a status confirmation signal to the voice gateway device 5a described in the status management table 151, and simultaneously activates the response timer 16. Since the response signal from the voice gateway device 5a has been received before the detection of the response timeout, “device 5a: no failure” is described in the state management table 151. Similarly, the response timer 16 is started at the same time as sending the status confirmation signal to the voice gateway device 5b. Since the response signal has been received before the detection of the response timeout, the state management table 5
In “b”, “device 5b: no failure” is described.

The state management table 151 is updated in the state confirmation cycle (t), and the response signal is detected before the detection of the response timeout even in the next state confirmation, so that the state management table for the voice gateway apparatuses 5a and 5b is updated. 1
The description of 51 indicates "no failure" in both of the voice gateway devices 5a and 5b.

FIG. 5 shows a processing sequence when a response timeout occurs. Referring to FIG. 5, the voice gateway device 1 transmits a status confirmation signal to the voice gateway device 5a described in the status management table 151, and simultaneously activates the response timer 16. Since the response signal from the voice gateway device 5a has been received before the detection of the response timeout, “device 5a: no failure” is described in the state management table 151. Similarly, the response timer 16 is started at the same time as sending the status confirmation signal to the voice gateway device 5b. Since the response signal has been received before the detection of the response timeout, the status management table 15
No. 1 describes “device 5b: no failure”.

In the next state check, since the state check signal does not reach the voice gateway apparatus 5a due to a failure in the communication path, the response time-out for the response signal from the voice gateway apparatus 5a is detected by the response timer 16.
Therefore, “apparatus 5a: faulty” is described in the state management table 151. On the other hand, for the voice gateway device 5b, the response signal is detected before the detection of the response timeout even in the next status confirmation, and therefore, the description in the status management table 151 for the voice gateway device 5b indicates "no failure". .

FIG. 6 shows an operation at the time of a call connection when a failure occurs in a network using the voice gateway device according to the embodiment of the present invention, and FIG. 7 shows a processing sequence thereof.

When a call is made from the telephone 3 to the telephone 7, the telephone 3 goes off-hook and then sends a selection number corresponding to the telephone 7 to the telephone exchange 2. This selection number reaches the voice gateway device 1 via the telephone exchange 2 after the activation signal. The voice gateway device 1 refers to the status management table 151 of the voice gateway device as the communication partner to determine whether there is a failure.

Here, as shown in FIG. 6, if a failure (★) has occurred in the communication path to the voice gateway device 5a, the processing sequence as shown in FIG. In the status management table 151, "failure" is described. Therefore, the voice gateway device 5b is selected without selecting the voice gateway device 5a as a communication partner.
And the voice gateway device 5 via the IP network 4
A call connection request signal is sent to the address b (broken line 1).

The call connection request signal reaches voice gateway device 5b, and voice gateway device 5b sends an incoming signal to telephone exchange 6 and sends a selection number, and simultaneously sends a call signal to voice gateway device 1. Transmit (broken line 2). The telephone exchange 6 is a voice gateway device 5
Ring the telephone 7 based on the selection number received from b.

As described above, even when a failure has occurred in a part of the plurality of voice gateway devices connected via the IP network, the status confirmation signal transmitted from the voice gateway device on the calling side at the time of call connection. Is controlled so as not to select a voice gateway apparatus in which a response signal timeout occurs in response to the call, so that the call connection time can be reduced.

The above-described embodiment is a preferred embodiment of the present invention, and can be variously modified and implemented without departing from the gist of the present invention.

[0048]

As is apparent from the above description, according to the voice gateway device of the present invention, its processing method and its program, the failure information of a plurality of voice gateway devices to be communicated via the IP network is periodically transmitted. Gateway device that detects a response signal timeout from the called-side voice gateway device in response to a state confirmation signal transmitted from the calling-side voice gateway device to the called-side voice gateway device during call connection Is controlled so as not to be selected as the communication partner, so that the call connection time can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a schematic configuration of a voice gateway device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing an operation of detecting the presence / absence of a failure in a voice gateway device of a communication partner.

FIG. 3 is a block diagram showing an operation at the time of call connection.

FIG. 4 is a processing sequence diagram when a response timeout has not occurred.

FIG. 5 is a processing sequence diagram when a response timeout occurs.

FIG. 6 is a block diagram showing a call connection status when a failure occurs.

FIG. 7 is a processing sequence diagram showing a call connection situation when a failure occurs.

FIG. 8 is a block diagram showing an operation example at the time of call connection when a failure occurs in a network using a conventional voice gateway device.

FIG. 9 is a processing sequence diagram at the time of a call connection when a failure occurs in a network using a conventional voice gateway device.

[Explanation of symbols]

 1, 5a, 5b Voice gateway device 2, 6 telephone exchange 3, 7 telephone 4 IP network 11 DSP unit 12 exchange interface unit 13 packet control unit 14 control unit 15 memory unit 16 response timer 111 voice compression processing unit 112 selection number processing unit 151 status management table

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04M 3/24 H04L 13/00 311 F term (Reference) 5K019 AB05 AB06 BA01 BB11 CA05 CD11 EA02 5K030 GA12 HB01 HC02 HD03 HD05 KA06 LA02 MC03 5K035 AA03 AA06 BB04 GG05 5K051 AA01 BB01 CC01 CC02 DD01 FF01 FF17 GG03 JJ13 LL01 LL02

Claims (10)

[Claims] 1. A voice gateway device for performing voice communication via an IP (Internet Protocol) network, wherein a call connection is controlled according to a state of a plurality of other voice gateway devices connected via the IP network. A voice gateway device. 2. A transmitting means for transmitting a status confirmation signal to the other plurality of voice gateway devices; a receiving means for receiving a response signal to the status confirmation signal from the other plurality of voice gateway devices; The voice gateway device according to claim 1, comprising: 3. A detection means for detecting a reception timeout of the response signal received by the reception means, and a management means for managing presence / absence of reception timeout of the response signal by the detection means as failure information. 3. The voice gateway device according to claim 2, wherein: 4. A call connection means for making a call connection only to said another voice gateway apparatus in which a failure is not detected by referring to said failure information managed by said management means. 3. The voice gateway device according to 3. 5. A processing method for a voice gateway device performing voice communication via an IP (Internet Protocol) network, wherein a status confirmation signal is transmitted to a plurality of other voice gateway devices connected via the IP network. And a receiving step of receiving a response signal to the status confirmation signal from the other plurality of voice gateway devices. 6. A detection step of detecting a reception timeout of the response signal received in the reception step, and a management step of managing presence or absence of reception timeout of the response signal in the detection step as failure information. 6. The processing method for a voice gateway device according to claim 5, wherein 7. A call connection step for making a call connection only to the other voice gateway apparatus in which a failure has not been detected by referring to the failure information managed by the management step. 7. The processing method of the voice gateway device according to 6. 8. A program for a voice gateway device for performing voice communication via an IP (Internet Protocol) network, wherein said program is provided to a plurality of other voice gateway devices connected to said voice gateway device via said IP network. A transmission process of transmitting a status confirmation signal to the voice gateway device, and a reception process of receiving a response signal to the status confirmation signal from the plurality of other voice gateway devices. 9. The voice gateway device, comprising: detection processing for detecting a reception timeout of the response signal received in the reception processing; and management for managing presence or absence of reception timeout of the response signal by the detection processing as failure information. 9. The program for a voice gateway device according to claim 8, wherein the program is executed. 10. The voice gateway device executes a call connection process for making a call connection only to the other voice gateway device in which a fault is not detected by referring to the fault information managed by the management process. 10. The program for a voice gateway device according to claim 9, wherein: