JP2002094661A - Routing method integrating subscription telephone network and ip network and exchange of subscription telephone network employing that method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a routing method integrating subscription telephone network and IP network in which routing can be made appropriately from subscription telephone network to IP network, and an exchange of subscription telephone network employing that routing method. SOLUTION: At the time of communication from an outgoing side terminal to an incoming side terminal, connection related parameters serving as a decision criterion for routing from subscription telephone network to IP network are included in one control signal, i.e., an address signal, being used for routing the subscription telephone network by common line signaling system. Routing from subscription telephone network to IP network is performed based on the connection related parameters.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a subscriber telephone network and an IP.
The present invention relates to a network-integrated routing method and an exchange of a subscriber telephone network using the routing method.

[0002]

2. Description of the Related Art Conventionally, most communication lines are routed by circuit switching in a subscriber telephone network. This circuit switching is routed based on the telephone number. Not only voice but also data such as facsimile and modem can be routed and connected with a normal telephone number.

[0003] Currently, VoIP (Voice Over) for realizing voice communication over an IP network (Internet network).
r Internet Protocol), FAX
FAX-IP (FAX-Int) that realizes communication over an IP network
Internet Protocol) has been developed.
Utilizing such technology, communication such as voice and facsimile
If it becomes possible to use the P network, it will be possible for the telecommunications carrier to select either the subscriber telephone network or the IP network in the future. For example, a connection via the Internet such as a detour of a line may be considered. Although voice is generally inferior in quality, communication is possible in a VoIP section on an IP network.

[0004]

However, at present, when voice communication is performed using an IP network, after dialing and connecting to an IP connection provider (provider), the telephone number of the other party is dialed again. It is necessary to perform an operation that asks them to do it. In this case, a dial number (via a provider) is used as a determination to connect the telephone network to the IP network.

[0005] That is, the network is selected by the caller's unrecognized caller's instruction, and the communication carrier decides what is to be transmitted (voice, fax, etc.). Transmission data). Therefore, the network cannot be freely switched between the subscribed telephone network and the IP network without the instruction of the caller. This is because, for example, voice communication can be performed in the VoIP section, but data communication such as a facsimile and a modem used in other telephone networks is not guaranteed. When using the IP network, the user must use the IP network in advance. Therefore, even if the existing network is disconnected due to some cause (failure, disaster, congestion state, etc.), for example, in the case of voice, the communication carrier physically transmits the voice signal to the VoIP section of another IP network. But you can't actually go around there freely.

[0006] In addition, the subscriber's telephone network and IP
If you do n’t mind communicating over either of the networks,
There may be a case where connection priority is given. In these cases,
As a telecommunications carrier, you want to use the line equipment effectively. However, even if a call routed on the telephone network is routed to the IP network as it is, there will be communications that are not guaranteed as described above.

The present invention has been made in view of the above points, and enables routing from a subscriber telephone network to an IP network.
It is an object of the present invention to provide a routing method that integrates a subscribed telephone network and an IP network capable of appropriately performing the routing, and an exchange of the subscribed telephone network using the routing method.

[0008]

SUMMARY OF THE INVENTION The subscriber telephone network of the present invention and I
The routing method integrating the P network is a routing method between a subscriber telephone network based on a common channel signaling system and an IP network. When communication is performed from an originating terminal to a destination terminal, a subscription using a common channel signaling system is performed. The address signal, which is one of the control signals used for the routing of the telephone network, includes connection-related parameters serving as a criterion for the routing from the subscribed telephone network to the IP network. It is characterized in that routing from the telephone network to the IP network is performed.

In the routing method of the present invention for integrating a subscriber telephone network and an IP network, the connection-related parameters may include a criterion for determining whether a subscriber requests or permits or rejects the routing from the subscriber telephone network to the IP network. In addition, when routing to the IP network is requested or permitted, the routing criterion is a criterion for the type of communication line in the IP network.

[0010] In the routing method of the present invention in which the subscriber telephone network and the IP network are integrated, the connection-related parameters are set according to a special number input to the calling terminal.

In the routing method of the present invention for integrating a subscriber telephone network and an IP network, one of the special numbers is
It is characterized in that routing from the subscriber telephone network to the IP network is prohibited.

In the routing method of the present invention for integrating a subscriber telephone network and an IP network, the connection-related parameters are set in the subscriber database in the originating exchange of the subscriber telephone network in association with the subscriber. And storing data serving as a reference.

Further, in the routing method of the present invention for integrating a subscriber telephone network and an IP network, the subscriber telephone
When routing to a network, a voice guidance is provided to allow the caller to select the type of communication line to be used.

The present invention also relates to an exchange for a subscribed telephone network based on a common channel signaling system, wherein the exchange is connected to an IP network via a connection point, and the originating exchange is connected from an originating terminal to a destination terminal. When communication is performed to the subscriber line, an address signal, which is one of the control signals used for routing of the subscriber telephone network based on the common channel signaling method, includes a connection-related parameter serving as a criterion for determination for routing from the subscriber telephone network to the IP network. And wherein the originating exchange or the transit exchange performs routing from the subscriber telephone network to the IP network based on the connection-related parameters.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a network configuration diagram of a common channel signaling type subscriber telephone network and an IP network using a routing method in which a subscriber telephone network and an IP network of the present invention are integrated.

In FIG. 1, the subscriber telephone network based on the common channel signaling system comprises an originating exchange 3, a transit exchange 5, and a destination exchange 4. In FIG. 1, the IP network includes a gateway server (GW) 6 serving as a connection point (interface) with the exchange of the subscriber telephone network, and a FAX-IP for providing a facsimile communication service on the IP network.
And a VoIP server 7 for providing a voice communication service over an IP network. Of course, each network includes other exchanges / control devices, servers, and the like, not shown. In FIG. 1, the originating terminal 1 is connected to the originating exchange 3, the destination terminal 2 is connected to the destination exchange 4, and the originating terminal 1 and the destination terminal 2 are connected to each other by a subscriber telephone network or IP.
Connected via a network.

In this embodiment, in the originating exchange 3, an address signal (IAM (Initial Address M) transmitted from the originating exchange 3 (originating node) is sent.
message): In the common channel signaling method, one of the control signals used for routing between exchanges is set to include the following newly provided connection-related parameters. Then, each of the exchanges (the originating exchange 3 and the transit exchange 5) performs routing (exchange processing) between the subscriber telephone network and the IP network based on the connection-related parameters. The connection-related parameters include the special number dialed by the caller,
Alternatively, it is set based on data on subscribers registered in advance in a subscriber database described later. The special number is dialed and input to the calling terminal 1 before dialing the called telephone number, for example. In the present embodiment, the subscribed telephone network and the IP
Routing between networks is performed, and routing between exchanges in the subscriber telephone network is performed in a usual manner.

Next, examples of connection-related parameters will be described. -Example of setting connection-related parameters (1) In the following example, an information element of an IP network request display as a connection-related parameter is set on an address signal (IAM). Here, "permit IP network ..." means that an IP network may be used. Also, “requesting an IP network...” Means that use of the IP network is requested by the caller.

An example of a service corresponding to the set value in this setting example is as follows.

Setting example of connection-related parameters (2) In the following example, information elements of an IP network request display and an IP communication line request display as connection-related parameters are set on an address signal (IAM). In this example, IP
It is assumed that the IP communication line request display is valid when the network request display is permitted or required.

An example of a service corresponding to the set value in this setting example is as follows. The above-mentioned telephone and FAX are a telephone service and a FAX service in a subscribed telephone network.

As described above, each exchange uses the connection-related parameters set in the address signal (IAM) to perform switching processing from the subscriber telephone network to the IP network and services (data communication / voice (telephone), FAX, etc.). ) Can be selected.

Next, the operation of a network composed of the subscriber line network of the common channel signaling system and the IP network configured as described above will be described. In the following, description will be made assuming that the connection-related parameters shown in the connection-related parameter setting example (2) are used.

First, an example of a method for setting connection-related parameters will be described. 1. By dialing a caller with a special number (special number: 00xx) before the telephone number (called telephone number),
An IP network request display and an IP communication line request display associated with this special number are set as follows.

2. If the IP network request display is acceptable,
When connecting to the network, the voice guidance
A type (voice / fax) of the communication line of the P network is selected (for example, a caller presses a push button corresponding to the selection and receives a PB sound). Then, according to this selection instruction, the setting of the IP network communication line request display is performed. Of course, the default setting may be determined in advance, and the setting of the IP network communication line request display may be set without depending on the voice guidance.

A subscriber who does not want to be detoured to the IP network can reject data (I
P network rejection data). In this case, a route other than the special number requesting the use of the IP network is not diverted to the IP network. When making a detour to the IP network, the originating exchange 3 or the transit exchange 5 that detours gives voice guidance for the caller to select the type of communication line.

This IP network rejection data is stored in the subscriber database in the originating exchange 3 for each subscriber. The originating exchange 3 sets connection-related parameters of the address signal based on the IP network rejection data. I
The registration / cancellation of the P network rejection data can be changed by the user himself. This eliminates the need for the subscriber who refuses to use the IP network to dial the special number every time, thereby improving the convenience of the user. An example of the operation of the caller and the operation of the exchange when registering / releasing the IP network rejection data will be described below (see FIG. 2).

1. Dial the IP network rejection data change special number (1XY) from the calling side terminal 1. Note that this IP network rejection data special number (1XY) is determined by the communication carrier,
This is a dial number for the subscriber to connect to the originating exchange 3 in order to register / cancel the IP network rejection data in the subscriber database.

2. The originating exchange 3 receives the IP from the originating terminal 1
When the network refusal data special number (1XY) is received, the voice guidance device prompts the calling side terminal 1 to provide voice guidance urging an operation for registering, changing, or canceling the IP network rejection data. In accordance with the voice guidance, the caller further dials the registration number 0 to register the IP network rejection data. To cancel the registration, the number 1 for canceling the registration is further dialed.

3. The originating exchange 3 has a number 0 for registration.
Alternatively, upon receiving the number 1 for canceling the registration, setting (registration / cancellation) of the IP network rejection data corresponding to the subscriber in the subscriber database is performed.

The above is an example only in the case where the use of the IP network is refused. In addition, the default setting when the user himself specifies the most used network or does not dial the special number is always stored in the subscriber database. Registration, change,
Release may be made possible. This eliminates the need for the caller to dial a special number, and also makes it possible to improve the efficiency of the work on the communication carrier side. In addition, the user can freely change the setting at any time even if the way of using the communication line changes. In particular, this is particularly effective when the use of the communication line used on the calling side is fixed (eg, FAX only).

Next, the connection-related parameter setting processing (shown in connection-related parameter setting example (2)) in the originating exchange 3 will be described with reference to the flowchart of FIG.

First, the originating exchange 3 determines the type of the special number (IP network rejection special number / IP network request special number / no special number (other than IP connection related special number)) received from the calling side terminal 1 (step S1). Here, the IP network rejection special number / IP network request special number is an example shown as an example of a method for setting connection-related parameters shown in the connection-related parameter setting example (2) described above, and is 00 × 0 or 00. × 1/00 × 2
Corresponding to

If it is determined in step S1 that the special number received by the originating exchange 3 is other than the IP connection-related special number, it is determined whether the caller is a registrant of the IP network rejection data (step S2). Whether the received special number is an IP network rejection special number is determined in step S1,
When it is determined that the sender is the registrant of the IP network rejection data, 2 (= rejection) is set in the IP network request display (step S3). Calls for which the IP network request indicator is set to 2 are communicated only through the subscriber telephone network.

Next, in step S2, the sender determines that
When it is determined that the user is not the P network rejection data registrant, 0 (= permitted) is set in the IP network request display (step S4).
Then, it is determined whether or not to make a detour from the originating exchange 3 to the IP network (step S5). This determination is made in the originating exchange 3 according to the state of the communication line. With this judgment,
If the determination is NO (do not detour from the originating exchange 3 to the IP network), the call is passed to the relay exchange 5. When the detour from the transit exchange 5 to the IP network is performed, voice guidance is sent from the transit exchange 5 to the caller, and the caller is prompted to select the type of communication line (FAX / voice). Then, according to the type of communication line selected by the caller, routing is performed from the transit exchange 5 to the IP network, and the Internet FA of the IP network is
Communicated by X or Internet phone.

If the determination in step S5 is YES (I
If it is determined to make a detour to the P network, a voice guidance is played and the caller is made to select the type of communication line (step S6). Also, in the determination of step S1, the originating exchange 3
When it is determined that the received special number is an IP network request special number, 1 (= request) is set in the IP network request display (step S7).

Then, step S6 or step S7
Thereafter, it is determined whether the type of the communication line is FAX or voice (step S8). This judgment is made when the special number received by the originating exchange 3 is an IP network request special number (in the above setting example, “00 × 1” or “00 × 2”).
Otherwise, it is performed based on the type of communication line selected by the caller as described above.

If it is determined in step S8 that the type of the communication line is voice, 0 (= voice) is set in the IP network communication line request display (step S9).
Also, the type of the communication line is FAX
If it is determined to be 1 in the IP network communication line request display
(= FAX) is set (step S10). In this way, a call in which the IP network request indication is set to 1 and the IP communication line request indication is set to 0 is sent from the originating exchange 3 or the transit exchange 5 to the IP network and communicated by Internet telephone in the IP network. . Similarly, the IP network request indication is 1, IP
The call for which the communication line request display is set to 1 is communicated by Internet FAX in the IP network. The operation flow described above is an example, and is not limited to the above-described processing flow.

Next, the signal flow in data communication, facsimile communication, and voice communication, and the operation of each device constituting the network consisting of the subscribed telephone network and the IP network of the common channel signaling system shown in FIG. Will be described with reference to the drawings.

[In the case of data communication on the subscribed telephone network] Next, in the case of performing data communication on the subscribed telephone network without using the IP network, the IP network request display is 2 (= IP network rejection: special number is 00 × 0), the signal flow (FIG. 4 :) in FIG.
Will be described with reference to the sequence diagram of FIG. The flow of signals described below is the same in the case of voice communication that is not routed from the subscriber telephone network to the IP network.

First, a call signal, a dial tone, a special number (00 × 0) and a called telephone number are transmitted from the calling terminal 1 to the calling exchange 3.
(Originating node), the originating exchange 3 displays 2 (IP) in the IP network request indication included in the address signal (IAM).
Network rejection) is set, and an address signal (IAM) including the IP network request indication is transmitted to the transit exchange 5 (relay node). The transit exchange 5 in the subscriber telephone network sequentially passes the address signal (IAM) to the next transit exchange 5 and sends it to the destination exchange 4 (destination node). Each transit exchange 5 has an IP
Since the network request display is set to 2 (= IP network rejection), the communication line is not bypassed to the IP network.

When the address signal (IAM) reaches the destination exchange 4, an address completion signal is sent from the destination exchange 4 to the originating exchange 3 via the transit exchange 5. Also,
After the destination exchange 4 sends an address completion signal, the destination exchange 4 calls the destination terminal 2 and a ringback tone is transmitted to the originating terminal 1 via each exchange. When the incoming call signal is sent from the called terminal 2 to the called exchange 4, a response signal is sent from the called exchange 4 to the calling terminal 1 via the transit exchange 5 and the calling exchange 3, and the calling terminal is sent. 1 establishes communication with the called terminal 2, and data communication is performed between the calling terminal 1 and the called terminal 2.

When a disconnection signal is sent from the originating terminal 1, a disconnection signal is sent from the originating exchange 3 to the destination exchange 4 via the relay exchange 5. Then, a restoration completion signal is sent from the destination exchange 4 to the originating exchange 3 via the transit exchange 5 and the communication ends. In the case of communication that is not supported by the IP network, such as data communication on the subscribed telephone network, the IP network request display is set to 2 (= rejected) so that the communication is not bypassed to the IP network. Routing can be performed only with the subscribed telephone network.

[Fax Communication] Next, in the case of performing FAX communication, when the IP network request display is 1 (= IP network request) and the IP network communication line request is 1 (when the special number is 00 × 2) FIG. 6: shows the flow of signals in FIG. 6; and FIG. 6: shows the flow of signals when the IP network request display is 0 (= IP network allowed) and the IP network communication line request is 1 (the special number is 00 × 3). ing. The operation sequence is shown in FIG.

The operation sequence shown in FIG. 7 differs from the operation sequence in the case of the data communication described above (FIG. 5) in that the IP network request display is 1 (= IP network request) and the
If the P network request display is 0 (= IP network permitted) and routing is performed from the subscriber telephone network to the IP network (when detouring to the IP network), the originating exchange 3 (originating node) or the transit exchange 5 The only difference is that signals are transferred from the (relay node) or the destination exchange 4 (the destination node) to the gateway server 6 (not shown in FIG. 7) and the FAX-IP server 8 of the IP network. When the IP network request display is 0 and there is no routing to the IP network, the operation sequence is the same as the above-described operation sequence for data communication.

When the caller requests use of the Internet FAX, the call is routed directly from the originating exchange 3 to the IP network or from the transit exchange 5 to the IP network, as shown in FIG. You. If the caller permits the use of the IP network and can use the IP network, for example, when making a detour, as shown in FIG.
Alternatively, the packet is routed from the transit exchange 5 to the IP network, and when there is no need to make a detour, the routing is performed using the subscriber telephone network as usual. Since the type of the communication line can be determined from the display of the IP network communication line request, the communication is guaranteed even if the communication is routed to the IP network.

[Voice Communication] Next, when voice communication is performed, the IP network request display is 1 (= IP network request) and the IP network request is
The signal flow when the network communication line request is 0 (when the special number is 00 × 1) is shown in FIG.
FIG. 8 shows the flow of signals when the IP network communication line request is 0 (there is no special number) and the IP network communication line request is 0. FIG. 9 shows the operation sequence.

The operation sequence shown in FIG. 9 is different from the operation sequence in the case of the above-mentioned FAX communication (FIG. 7) in that the IP network request display is 1 (= IP network request), and
If the P network request display is 0 (= IP network permitted) and routing is performed from the subscriber telephone network to the IP network (when detouring to the IP network), the originating exchange 3 (originating node) or the transit exchange 5 The only difference is that signals are transferred from the (relay node) or the destination exchange 4 (the destination node) to the gateway server 6 (not shown in FIG. 9) and the VoIP server 7 of the IP network. When the IP network request display is 0 and there is no routing to the IP network, the operation sequence is the same as the above-described operation sequence for data communication.

When the caller requests use of the Internet telephone, the call is routed directly from the originating exchange 3 to the IP network or from the relay exchange 5 to the IP network, as shown in FIG. You. When the caller permits use of the IP network and can use the IP network such as when making a detour, the caller is routed from the originating exchange 3 or the transit exchange 5 to the IP network as shown in FIG. If there is no need to do so, it is routed as usual using the local telephone network. Since the type of the communication line can be determined from the display of the IP network communication line request, the communication is guaranteed even if the communication is routed to the IP network.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes a design and the like without departing from the gist of the present invention. It is.

[0051]

As described above in detail, according to the present invention, when performing communication from a calling terminal to a called terminal, one of control signals used for routing of a subscriber telephone network by a common channel signaling method. From the subscriber telephone network to the address signal
Based on these connection-related parameters, including connection-related parameters that serve as criteria for determination of routing to the P network,
Since routing from the subscriber telephone network to the IP network is performed, the communication carrier and the subscriber can select and use the IP network in addition to the subscriber telephone network.

According to the present invention, the connection-related parameter is a criterion for requesting, permitting, or rejecting by a subscriber with respect to routing from the subscriber telephone network to the IP network. If the routing from the subscribed telephone network to the IP network is requested or permitted, the communication carrier:
It is possible to provide a subscriber with communication over an IP network having a low communication cost, and to bypass a communication line to the IP network in the event of a failure, disaster, or congestion. Further, by rejecting the routing to the IP network, the subscriber can avoid the problem that communication cannot be performed due to the use of the IP network.

Further, according to the present invention, since the setting is made according to the special number inputted to the calling terminal, the subscriber can request, permit, or reject the use of the IP network. Can be any. According to the present invention, the subscriber database in the originating exchange of the subscriber's telephone network stores reference data for setting connection-related parameters associated with the subscriber. Configures connection-related parameters when not dialing special numbers,
It can be arbitrarily specified in advance.

[Brief description of the drawings]

FIG. 1 shows a common channel signaling type telephone network and I using a routing method of integrating the subscriber telephone network and the IP network of the present invention.
It is a network block diagram which consists of a P network.

FIG. 2 is a diagram illustrating the setting of IP network rejection data.

FIG. 3 is a flowchart illustrating an example of a connection-related parameter setting process in an originating exchange.

FIG. 4 is a diagram showing a signal flow when data communication is performed on a subscriber telephone network.

FIG. 5 is an operation sequence diagram between respective devices when performing data communication on a subscriber telephone network.

FIG. 6: FAX on a subscriber telephone network or further on an IP network
FIG. 3 is a diagram showing a signal flow when performing communication.

[Fig. 7] FAX over a subscriber telephone network or further over an IP network
FIG. 7 is an operation sequence diagram between devices when performing communication.

FIG. 8 is a diagram showing a signal flow when voice communication is performed on a subscriber telephone network or further on an IP network.

FIG. 9 is an operation sequence diagram between devices when voice communication is performed on a subscriber telephone network or further on an IP network.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Calling terminal (calling terminal) 2 ... Calling terminal (calling terminal) 3 ... Calling side exchange (calling side node) 4 ... Calling side exchange (calling side node) 5 ... Transit exchange (relay node) 6 ... Gateway server (GW) 7 VoIP server 8 FAX-IP
server

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shinya Serizawa 1-9-1, Konan, Minato-ku, Tokyo NTT Communications Wear Co., Ltd. (72) Inventor Kinyasu Fukuda Konan, Minato-ku, Tokyo 1-9-1-1 NTT Communicationware Co., Ltd. (72) Inventor Noriaki Jinuchi 1-9-1-1 Konan, Minato-ku, Tokyo NTT Communicationware Co., Ltd. F Terms (reference) 5K030 GA08 HA01 HA08 HC01 HC02 HD05 JA11 JL07 LB05 5K036 EE14 HH08 5K051 BB01 BB03 CC01 DD01 FF16 HH03 HH15

Claims (7)

[Claims] 1. A subscribed telephone network based on common channel signaling,
A routing method for communication with a P-network, wherein when communication is performed from a calling terminal to a called terminal, an address signal, which is one of control signals used for routing of a subscribing telephone network based on a common channel signaling method, is added to the address signal. A subscribed telephone network that performs routing from the subscribed telephone network to the IP network based on the connection-related parameters, including connection-related parameters serving as a reference for determination from the telephone network to the IP network; A routing method integrating an IP network. 2. The connection-related parameter serves as a criterion for determining whether a subscriber requests, permits, or rejects the routing from the subscriber telephone network to the IP network, and when the routing to the IP network is requested or permitted, 2. The routing method according to claim 1, wherein the method serves as a criterion for determining the type of a communication line in an IP network. 3. The integrated telephone network and IP network according to claim 1 or 2, wherein the connection-related parameters are set according to a special number input to a calling terminal. Routing method. 4. The integrated telephone network according to claim 3, wherein one of the special numbers is for prohibiting routing from the local telephone network to the IP network. Routing method. 5. A subscriber database stored in a subscriber exchange in an originating exchange of the subscriber telephone network, the data being a reference for setting the connection-related parameters associated with the subscriber. 5. A routing method for integrating a subscriber telephone network and an IP network according to any one of claims 1 to 4. 6. The method according to claim 1, wherein, when routing from the subscriber telephone network to the IP network, the type of communication line to be used is selected by the caller based on voice guidance.
6. A routing method for integrating a subscriber telephone network and an IP network according to claim 5. 7. An exchange of a subscribed telephone network based on a common channel signaling system, wherein the exchange is connected to an IP network via a connection point, and the originating exchange communicates from the originating terminal to the destination terminal. At this time, the address signal, which is one of the control signals used for the routing of the subscribing telephone network by the common channel signaling system, includes connection-related parameters serving as a criterion for routing from the subscribing telephone network to the IP network. An originating exchange or a transit exchange performs routing from the subscriber telephone network to an IP network based on the connection-related parameters.