JPH05328429A - Service control system during roaming - Google Patents

Abstract

PURPOSE:To provide the control system receiving the same service when a roaming subscriber is resident in its own network. CONSTITUTION:A common representative specific number is provided between enterprises and when a mobile body exchange VMSC of other network processes a call signal SETUP from a roaming mobile set MS and detects the representative specific number from a called number field, the exchange indexes a home network of the mobile set based on the caller number and makes call connection to a mobile set exchange HMSC. Or the mobile set detects a dial entry of the representative specific number to set information of a roaming service request to a field of a call signal and sends the call, and when the mobile body exchange of the other network detects the information representing the roaming service request, the exchange makes call connection to the mobile body exchange HMSC. Then the mobile body exchange of the home network subjected to setup provides a relevant additional service to call connection to a destination based on a dial number other than the representative specific number.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roaming service control method, and more particularly, a roaming service control method in a mobile communication network in which a plurality of mobile communication networks of different operators connect to each other via a mobile repeater exchange. Regarding In this type of mobile communication network, each operator independently provides additional services (call forwarding, answering service, etc.), and when a subscriber of one network roams (moves) to another network, the roaming destination Then, it is possible to receive only basic services common to each network, for example, basic services of outgoing / incoming calls. Therefore, improvement of such inter-network service is desired.

[0002]

2. Description of the Related Art FIG. 7 is a diagram showing a configuration of a conventional mobile communication network, in which NW1 is a mobile communication network of an operator 1, SE ₁
Is a wireless service area of NW1, NW2 is a mobile communication network of operator 2, SE ₂ is a wireless service area of NW2, MT
S is a mobile switching center, MSC is a mobile switching center, STP
Is a common line signal relay station, HLR is a subscriber information memory station for home network subscribers, VLR is a subscriber information memory station for Romer, BS is a base station, MS (A) is a mobile station that subscribes to NW1, MS (B) is a mobile unit that is subscribed to NW2, the dotted line is the line non-corresponding signal route, and the solid line is the line corresponding signal route.

Generally, such a plurality of mobile communication networks NW
It is the MTS closest to the other network that connects the networks 1 and NW2, and this may be called a gateway exchange. Line-corresponding signals and line-non-corresponding signals are connected through this gateway exchange. HLR of NW1 and VL of NW2
R manages the registration of the current location of the mobile station MS (A) as it moves, so that no matter which network the mobile station MS (A) is in, at least the basic call origination / termination is required. Can receive service. The same applies to mobile unit MS (B). The details will be described below.

FIG. 8 is a diagram showing stored contents of a conventional HLR and VLR. In the area referred to by the subscriber number MSN of the subscriber A in the HLR of NW1, a subscriber authentication key, a mobile station number MSI, a roaming state, a roaming destination network, a roaming number RON, etc. are stored. In the area referred to by the mobile unit number MSI of the subscriber A, the mobile unit authentication key, the subscriber number MSN, etc. are stored.

In the VLR of NW2, a subscriber authentication key, a mobile station number MSI, subscriber data and the like are stored in an area referred to by a subscriber number MSN of subscriber A who is a Roman. In the area referred to by the mobile unit number MSI of the subscriber A, the mobile unit authentication key, roaming number RON,
Subscriber number MSN, routing number PRN of VMSC,
Position information, mobile device data, etc. are stored.

[0006] FIG. 9 is a diagram for explaining a conventional roaming location registration process. In the figure, HMSC is a mobile switching center of subscriber A's home network NW1, and VMSC is a mobile switching center of subscriber A's roaming destination network NW2. .. Note that FIG. 9 explains logical connections between important elements in communication in an easy-to-understand manner, and the actual signal connection paths follow the configuration of FIG.

When the MS (A) moves to the wireless service area SE ₂ of the NW2, the MS (A) detects the change of the location registration area and sends a location registration request to the VMSC of the NW2. This is the start of roaming. As a result, the VMSC sends an authentication information read request to the VLR, and the VLR
Sends an authentication information read request accompanied by the subscriber number MSN and the mobile unit number MSI to the HLR of NW1. As a result, the HLR returns the authentication key of the subscriber A to the VLR, and the VL
R returns this authentication key to VMSC. The VMSC performs the authentication process of the subscriber A with the authentication key.

If the authentication result is OK, VMSC is
The location registration acceptance is sent to (A), and the location registration instruction is sent to the VLR. As a result, the VLR hunts the roaming number RON, and this is the subscriber number MS of the subscriber A.
N, mobile unit number MSI, VMSC routing number PR
Store with N and position information. Further, the VLR requests the HLR to store the roaming number RON and register the network position, and the HLR is in the roaming state (= roaming),
The roaming destination network (= NW2), roaming number RON, etc. are stored. Further, the HLR transfers the subscriber data of the subscriber A to the VLR, and the VLR stores data such as authentication information together with the subscriber data.

[0009] Thus, the information of the subscriber A is the HL of the NW1.
The service is registered in cooperation with the R and the VLR of the NW2, and a certain service can be received even in the NW2 of the roaming destination. FIG. 10 is a diagram for explaining a conventional service control method during roaming. When the subscriber A dials out at the roaming destination NW2, the VMSC sends the calling signal (SETU).
The calling number (subscriber number) in P) is recognized as the calling from the subscriber A who has joined the other network, and the VLR is requested to read the outgoing information of the subscriber A. As a result, the VLR reads the authentication data of the subscriber A from the subscriber number MSN and the mobile station number MSI, and outputs V
Returning to the MSC, the VMSC carries out the authentication process of the subscriber A.

If the authentication result is OK, the VMSC checks the called number (dial number) in the calling signal (SETUP),
When it is determined that the call is a normal called number and it is possible to make a call, the address setting signal IAM is sent to the corresponding destination exchange to set the call. In response to this, the terminating exchange responds with an address completion signal (ACM), calls the called party, and when the called party hooks off the handset, the called party answer signal (AN
M) is returned. As a result, the VMSC sends a connection signal CONN to the MS (A), and a communication path is established between the subscriber A and the called party.

Although not shown, an incoming call to subscriber A roaming to NW2 is once connected to NW1.
However, since the state of the subscriber A in the HLR is roaming to the NW2, the call is connected to the roaming destination NW2. As described above, conventionally, the subscriber A roaming to the NW2 is provided with only the basic service of outgoing / incoming calls from the NW2.

However, if only the outgoing / incoming service is provided, the subscriber A controls the additional services that he / she receives by paying the contract fee at the NW1, such as starting / stopping the incoming call transfer and registering the transfer destination number. Control operation such as start / stop of answering service and message listening, NW of roaming destination
You cannot do anything from 2. Further, as a matter of course, the subscriber B who has roamed to the NW1 is not aware of any additional service provided by the NW2. Therefore, the subscriber B receives the special number for the service control by the NW1. Even if you dial, you are restricted as an unused number.

Further, when the subscriber A roams to the NW2 and wants to transfer the incoming call to the transfer destination registered during roaming, the transfer destination number cannot be registered from the NW2, so that all incoming calls can be received. I will receive it. Furthermore,
Subscriber A has an answering service on NW1 and NW2
When roaming to No. 2, since the answering service cannot be released from NW2, all incoming calls are connected to the message recording device of NW1 and are not received by subscriber A.

Furthermore, there is a case where a special number service such as an emergency call such as 110 or a time signal is not provided in the roaming destination network. Furthermore, at present, for the international connection, it is the international network that performs billing processing for both outgoing and incoming calls, and the mechanism is such that the international network directly bills the subscriber. Therefore, the other network connected to the international network charges the network usage fee to the international network. In this case, when the subscriber A makes a call from the roaming destination NW2 to the international network, the NW2 becomes the originating network. As a result, the international network mistakenly recognizes the originator A as a subscriber belonging to the NW2, and bills the bill. Trouble may occur in the business liquidation. For this reason, currently, roaming subscribers are prohibited from making or receiving calls to the international network.

[0015]

As described above, in the conventional roaming service control method, since each network provides only a common basic service, for example, only outgoing / incoming calls, it is possible to provide a subscriber roaming to another network. There was a problem that serviceability was significantly reduced. It is an object of the present invention to provide a roaming service control method in which a subscriber roaming to another network can receive the same service as if he / she is in the own network.

[0016]

The above problems can be solved by the structure shown in FIG. That is, the in-roaming service control method of the present invention (1) is a roaming-in-service control method in a mobile communication network in which a plurality of mobile communication networks NW1 and NW2 of different operators are connected to each other via a mobile switching center MTS. , A common representative special number is provided among the operators, and the mobile switching center VMSC of another network processes the representative special number from the called number field when processing the calling signal SETUP from the mobile station MS roaming to the concerned network. If it detects the, the home network of the mobile station MS is determined from the calling number, and the home network is specified or any mobile switching center HM is identified.
The call is connected to the SC.

The roaming service control method of the present invention (7) is a plurality of mobile communication networks NW1,
In the service control method during roaming in the mobile communication network in which the NW2 is connected to each other via the mobile repeater exchange MTS, a representative special number common to the operators is provided, and the mobile unit MS detects the dial input of the representative special number. To carry a roaming service request information in a predetermined field of a calling signal SETUP on the wireless,
When the mobile switching center VMSC of the other network detects the information indicating the roaming service request from the predetermined field when processing the calling signal SETUP from the mobile station MS roaming to the network, The home network of the mobile station MS is determined from the calling number, and a call connection is made to the home network specified or any mobile switching center HMSC.

[0018]

In the present invention (1), the subscriber A roaming to the NW2 dials a representative special number (for example, "XX" by a numeral) by operating the mobile unit MS, and the mobile unit MS is dialed. The representative special number "○○○" is mounted in the called number field of the call signal SETUP on the radio to make a call.

Receiving this, the mobile switching center VMSC of the other network
When processing the calling signal SETUP from the mobile station MS roaming to the network, if the representative special number "○○○" is detected from the called number field, the calling number (subscriber number ) To the home network NW1 of the mobile unit MS
, And makes a call connection to the specific or arbitrary mobile switching center HMSC of the home network NW1.

Therefore, the subscriber A can automatically roam to any other network by dialing the same representative special number "○○○" to automatically switch the mobile switching system HMS of the home network NW1.
By connecting to C, it is possible to easily change the additional service in the home network NW1 and make / receive the call through the home network NW1 from the roaming destination. Preferably, the mobile switching center VMSC of the other network assigns the representative special number "XX" in the called number field in the calling signal SETUP to the call setting information (address setting signal) IAM of the home network mobile switching center HMSC. Installed in the field for call connection. Accordingly, the mobile switching center HMSC of the home network can recognize the incoming call based on the representative special number by detecting the representative special number "XX" of the incoming call IAM.

[0021] Further, preferably, when the mobile switching center HMSC of the home network detects the representative special number "○○○" from the called number field of the call setting information IAM, the mobile switching center VMSC of the other network is used. New service special number "ΔΔΔ" from subscriber A or dial number "ΔΔ-" of the other party
The dial number “ΔΔΔΔ” is received through the in-channel, and the corresponding additional service is provided or the call is connected to the other party based on the received dial number.

Preferably, the representative special number is a code of a symbol key such as "#". Then, the subscriber A may, for example, represent the representative special number "#" followed by the service special number "ΔΔ".
"" Or the other party's dial number "ΔΔ-ΔΔΔΔ". Also preferably, a mobile switching center V of another network
The MSC sends the representative special number "#" in the called number field in the calling signal SETUP and the dial number "ΔΔΔ" or "ΔΔ-ΔΔΔΔ" that follows it to the mobile switching center HM of the home network.
It is mounted in the called number field of the call setting information IAM for the SC to establish a call connection. Thus, the mobile switching center HMSC of the home network can recognize the incoming call based on the representative special number by detecting the representative special number "#" of the incoming call IAM.

Further, preferably, when the mobile switching center HMSC of the home network detects the representative special number "#" from the called number field of the call setting information IAM, the dial number "ΔΔΔ" or "excluding the representative special number" is detected. Based on ΔΔ−ΔΔΔΔ ”, the corresponding additional service is provided or the call is connected to the other party. In the present invention (7), the subscriber A roaming to the NW 2 operates the mobile unit MS to operate the representative special number "○○○" or the representative special number "#" followed by the service special number "ΔΔΔ" or the other party. Dial number "ΔΔ-ΔΔ
Dial “ΔΔ”.

By detecting dial input of the representative special number "○○○" or "#", the mobile station MS mounts information indicating a service request during roaming in a predetermined field of the call signal SETUP on the wireless. Make a call. In response to this, the mobile switching center VMSC of the other network detects the information indicating the roaming service request from the predetermined field when processing the calling signal SETUP from the mobile station MS roaming to the network. In this case, the home network NW1 of the mobile unit MS is calculated from the calling number (subscriber number),
Specific or arbitrary mobile switching center HMS of the home network NW1
The call is connected to C.

Therefore, subscriber A automatically dials the same representative special number "○○○" or "#" to the mobile switching center HMSC of home network NW1 while roaming to any other network. Connected.

[0026]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Note that the same reference numerals denote the same or corresponding parts throughout the drawings. FIG. 6 is a diagram illustrating call setting information according to the embodiment. FIG. 6A is a diagram showing a partial structure of the call setting information SETUP when the mobile station makes a call. In the call setting information SETUP, a protocol identifier, a feature activation FA, and a calling number (subscriber number). ) A field for mounting SN, called number (dial number) DN, etc. is provided.

FIG. 6B is a diagram showing the relationship between the identification number of the feature activation field FA and the service function. In addition to the conventional call transfer, three-way call, answering machine, and roaming according to the present invention. An identification number of the medium service (however, used only in the third embodiment) is provided. 2 and 3 are diagrams for explaining the service control method during roaming according to the first embodiment.

In FIG. 2, the subscriber A roaming to the NW2 dials a dial number "XX" consisting of, for example, numbers by operating the mobile unit MS. This number "○○
The symbol "○" is a representative special number commonly agreed between the operators of NW1 and NW2, and means a connection request to the home network (NW1 in this example). The mobile station MS makes a call by mounting the representative special number "XX" in the called number field DN of the call signal SETUP on the radio.

Upon receipt of this, the VMSC receives a call from the subscriber A of the other network as in the case of FIG.
A request to read the sender information is sent to R, and the subscriber A is authenticated based on the authentication information returned from the VLR. If the authentication result is acceptable, the VMSC checks the called number (dial number) in the calling signal SETUP, but in the first embodiment, the representative special number "" in FIG. 2 is checked before checking whether the called number is OK in FIG. "○○○" is inspected. Then, if the representative special number is not detected, the process proceeds to the inspection of whether the called number is OK in FIG. 10. However, in this example, by detecting the representative special number "XX", the calling number in the calling signal SETUP (subscription The home network NW1 of the mobile unit MS from
A call is connected to the mobile switching center HMSC of the home network NW1.

At that time, VMSC is a representative special number "○○○"
Is mounted in the called number field of the address setting information IAM for the HMSC for call connection. This way, HMS
C detects the representative special number "○○○" from the address setting information IAM, and can recognize the incoming call as an incoming call based on the representative special number from VMSC. Also, VMSC is V
When the HMSC of the connection destination is specified in the data relating to the subscriber A in the LR, the call is connected to the specific HMSC, but when it is not specified, the call is connected to an arbitrary HMSC.

Upon receiving this, the HMSC responds with an address completion signal (ACM) and, in this case, the HMSC self becomes the called party, and therefore further returns a called party answering signal (ANM). As a result, the VMSC sends a connection signal CONN to the MS (A), and a speech path is established between the HMSC and the subscriber A. Then, the HMSC sends a guidance and prompts the subscriber A to input the subscriber number. The subscriber A inputs the subscriber number by operating the mobile device. The mobile station MS puts the subscriber number on the INFO signal (additional information signal area) and sends a corresponding digit signal. Upon receiving the digit signal, the VMSC puts it on the in-channel (voice channel) and sends the corresponding PB signal to the HMSC. The HMSC further prompts the operator to enter the personal identification number. The subscriber A similarly inputs the personal identification number.

Upon receipt of the personal identification number, the HMSC sends the HLR
A request for reading the subscriber information is sent to the HLR, and the subscriber A
Information is read. The HMSC collates the subscriber number and the personal identification number, and if the subscriber is a service-allowed subscriber, the subscriber A prompts the subscriber A to input a dial number with guidance. The subscriber A inputs the dial number by operating the mobile device. In FIG. 3, the HMSC determines whether the received dial number is a service special number “ΔΔΔ”. Service special number “ΔΔ
“Δ” is a number for requesting additional services such as start / stop of call transfer, registration of transfer destination number, start / stop of answering service, and message listening to NW1.

When the subscriber A dials, for example, the service special number for starting the call transfer, the HMSC requests the HLR to register the additional service. The HLR registers the call transfer start and sends a registration response back to the HMSC in the same manner as when the subscriber A requests the home network for the HLR. The HMSC sends the registration confirmation guidance, which is VMSC, MS.
Subscriber A is notified via.

After that, the incoming call to the subscriber A is once NW1.
However, when the HMSC that accepts the call reads the subscriber information of the HLR, the call is transferred because the service status is that the call transfer is being started.
This procedure is the same when canceling another answering service. If it is not the service special number, it is determined whether or not it is a call request “ΔΔ−ΔΔΔ” to the partner of NW1 or another network. If subscriber A dials an international network, for example, H
The MSC performs address setting IAM for the international network based on the dialed number. When this is connected to the called party and there is a called party response ANM from the connection destination, the call path between the subscriber A and the HMSC and the call path to the connection destination are connected to enable the call.

In this case, the HMSC is the subscriber A of its own network.
Call control and billing processing are performed in the same manner as when the call originates from the own network. In addition, the VMSC of NW2 calculates the line usage fee of NW2 and performs settlement between operators. Therefore, even when the subscriber A makes a call from the roaming destination NW2 to the international network, the calling network is NW1 as seen from the international network, and therefore the subscriber A is recognized as a subscriber of NW1. Therefore, there is no fear of troubles in billing and settlement between businesses, and it is possible to make outgoing / incoming calls to the international network at the roaming destination, which is currently regulated.

In the roaming destination NW2, 11
Even if an emergency call such as No. 0 is not allowed, or if it is allowed but the line congestion is less likely to occur, it is possible to make a call from the NW1 of the own network by dialing the representative special number. FIG. 4 is a diagram for explaining the service control method during roaming according to the second embodiment. The representative special number of the second embodiment is composed of a code of a symbol key such as "#".
The subscriber A is, for example, a representative special number “#” followed by a service special number “ΔΔΔ” or a destination dial number “ΔΔ”.
Dial “-ΔΔΔΔ”. The mobile station MS sends the representative special number “#” and the service special number “ΔΔΔ” or the dial number “ΔΔ−ΔΔΔΔ” of the other party to the call signal SE on the wireless communication.
The call is placed in the called number field DN of the TUP.

Upon receipt of this, the VMSC confirms the authentication of the subscriber A in the same manner as the processing of FIG. If the authentication result is acceptable, the called number field in the calling signal SETUP is checked, and since the representative special number "#" is included in this example, the mobile station M from the calling number in the calling signal SETUP is checked.
The home network NW1 of S is determined and a call connection is made to the mobile switching center HMSC of the home network NW1.

At this time, the VMSC uses the representative special number "#" and the service special number "ΔΔΔ" or the dial number "Δ" of the other party.
“Δ-ΔΔΔΔ” is mounted in the called number field of the address setting information IAM for the HMSC to establish a call connection. As a result, the HMSC can detect the representative special number "#" from the received IAM, and recognize the incoming call as an incoming call based on the representative special number from the VMSC.

Thereafter, the HMSC provides corresponding additional services in the same manner as in FIG. 3 based on the service special number "ΔΔΔ" excluding the representative special number "#" of the IAM or the dial number "ΔΔ-ΔΔΔΔ" of the other party. Alternatively, the call is connected to the other party. According to the second embodiment, the subscriber A can collectively dial the representative special number “#” and the service special number “ΔΔΔ” or the destination dial number “ΔΔ−ΔΔΔΔ”.
Operability is greatly improved.

In the second embodiment, the service permission authentication process of the subscriber A by the HMSC as shown in FIG. 2 is omitted, but it may be performed. Alternatively, not only the authentication processing of the service permission of the subscriber A by the HMSC of FIG. 2 but also the sending of the registration confirmation guidance by the HMSC as shown in FIG. 3 may be omitted. In this way, it is not necessary to form a communication path between the HMSC and the subscriber A, and the processing of the service special number by the HMSC is greatly simplified.

FIG. 5 is a diagram for explaining the service control method during roaming according to the third embodiment. The subscriber A dials the representative special number "○○○" or the representative special number "#" and then the service special number "ΔΔΔ" or the destination dial number "ΔΔ-ΔΔΔΔ" by operating the mobile unit MS. Mobile device M
S detects the dial input of the representative special number "○○○" or "#" to mount the identification number "7" indicating the service request during roaming in the feature activation field FA of the call signal SETUP on the wireless. Make a call.
At this time, the service special number “ΔΔΔ” or the dial number “ΔΔ−ΔΔΔΔ” of the destination is the called number field DN.
It is installed in.

Upon receipt of this, the VMSC confirms the authentication of the subscriber A in the same manner as the processing of FIG. If this authentication result is acceptable, the VMSC checks the feature activation field FA in the calling signal SETUP, and in this example, the identification number "7" is detected, so that the movement from the calling number in the calling signal SETUP is performed. Home network of machine MS
W1 is calculated, and the mobile switching center HM of the home network NW1
The call is connected to the SC.

At this time, the VMSC determines that the service special number "Δ
“ΔΔ” or the destination dial number “ΔΔ−ΔΔΔΔ” is mounted in the called number field of the address setting information IAM for the HMSC, and the identification number “7” of the feature activation field FA is mounted in the feature activation field FA of the IAM. Make a connection. On the other hand, the HMSC can detect the identification number "7" of the feature activation field FA from the received IAM, and recognize the incoming call as an incoming call based on the representative special number from the VMSC.

Thereafter, the HMSC adds a corresponding addition in the same manner as in FIG. 2 and FIG. 3 or FIG. 3, based on the service special number “ΔΔΔ” in the IAM called number field or the dial number “ΔΔ−ΔΔΔΔ” of the other party. Providing services or connecting calls to the other party. In addition, subscriber is representative special number "#"
It is not necessary to input the service special number “ΔΔΔ” or the dial number “ΔΔ−ΔΔΔΔ” of the other party subsequently. The representative special number "#" may be entered in any order.

Further, the location where the information indicating the service request during roaming is mounted by the mobile station MS upon detecting the input of the representative special number is not limited to the feature activation field FA of the calling signal SETUP on the radio.

[0046]

As described above, according to the present invention, a common representative special number is provided between carriers, and the mobile switching center VMSC of another network sends a call signal from the mobile station MS roaming to the network. When a representative special number is detected from the called number field during processing of SETUP, the home network of the mobile station MS is determined from the calling number, and a call is made to a specific or arbitrary mobile switching center HMSC of the home network. The mobile station MS makes a call by mounting the information indicating that the roaming service request is placed in a predetermined field of the calling signal SETUP on the wireless by connecting or detecting the dial input of the representative special number. When the mobile switching center VMSC detects the information indicating the service request during roaming from the predetermined field, the mobile switching center VMSC determines the home network of the mobile station MS from the calling number. Since a call connection is made to the home network specified or any mobile switching center HMSC, the subscriber automatically dials the same representative special number even when roaming to any other network. Mobile exchange HM
Connected to the SC, it is possible to easily change additional services in the home network and make / receive calls through the home network from the roaming destination network. As a result, it becomes possible to access between the roaming destination network and the international network, which were regulated in the past, and the settlement between operators becomes clear. Furthermore, it also has the effect of protecting additional services that are becoming more differentiated among businesses.

[Brief description of drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is a diagram illustrating a roaming service control method according to the first embodiment.

FIG. 3 is a diagram for explaining a service control method during roaming according to the first embodiment.

FIG. 4 is a diagram illustrating a service control method during roaming according to a second embodiment.

FIG. 5 is a diagram for explaining a service control method during roaming according to a third embodiment.

FIG. 6 is a diagram illustrating call setting information according to the embodiment.

FIG. 7 is a diagram showing a configuration of a conventional mobile communication network.

FIG. 8 is a diagram showing stored contents of a conventional HLR and VLR.

FIG. 9 is a diagram illustrating a conventional roaming position registration process.

FIG. 10 is a diagram illustrating a conventional roaming service control method.

[Explanation of symbols]

 NW1, NW2 Mobile communication network MTS Mobile relay switch HMSC, VMSC Mobile switch BS Base station MS Mobile

Claims (7)

[Claims] 1. A plurality of mobile communication networks (NW) from different operators
In the service control method during roaming in the mobile communication network in which the mobile switching systems (1, NW2) are connected to each other through the mobile switching center (MTS), common representative special numbers are provided between the operators, and the mobile switching systems (VMSC) of other networks are provided. ) Detects a representative special number from the called number field when processing a calling signal (SETUP) from a mobile station (MS) roaming to the network, the mobile station (MS) starts from the calling number. ), The home network is identified, and a call connection is made to a mobile switching center (HMSC) specified in the home network or to an arbitrary mobile switching center (HMSC). 2. The mobile switching center (VMSC) of the other network uses the representative special number of the called number field in the calling signal (SETUP) as the called number of the call setup information (IAM) for the mobile switching center (HMSC) of the home network. 2. The service control method during roaming according to claim 1, wherein the service control method is mounted in a field for call connection. 3. A home network mobile switching center (HMSC)
When the representative special number is detected from the called number field of the call setting information (IAM), the mobile switching center (VM) of the other network concerned.
A new dial number is newly received from the subscriber via the SC) through the in-channel, and the corresponding additional service is provided or the call is connected to the other party based on the received dial number. Service control method during roaming. 4. The service control method during roaming according to claim 1, wherein the representative special number comprises a code of a symbol key. 5. The mobile switching center (VMSC) of the other network uses the representative special number and dial number of the called number field in the calling signal (SETUP) as the mobile switching center (HMS) of the home network.
5. The in-roaming service control method according to claim 4, wherein the call connection is made by mounting the call setup information (IAM) for C) in the called number field. 6. A home network mobile switching center (HMSC)
When the representative special number is detected from the called number field of the call setting information (IAM), the corresponding additional service is provided or the call is connected to the other party based on the dial number excluding the representative special number. The in-roaming service control method according to claim 5. 7. A plurality of mobile communication networks (NW) from different operators
In the service control method during roaming in the mobile communication network in which the mobile relay exchanges (MTS) (1, NW2) are connected to each other, the common special number is provided between the operators, and the mobile station (MS) is the special special number. The mobile switching center (VMSC) of the other network makes a call by mounting the information indicating the request for service during roaming in a predetermined field of the calling signal (SETUP) on the radio by detecting the dial input of When the information indicating the service request during roaming is detected from the predetermined field when processing the calling signal (SETUP) from the mobile station (MS) roaming in the network, the mobile station is identified from the calling number. (MS) home network is identified, and a call connection is made to a specific or arbitrary mobile switching center (HMSC) of the home network. To control system.