JPH09121375A - Path selection managing system for mobile terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To set an optimum line path not passing through the home exchange station of a loaming mobile terminal on is way. SOLUTION: This system is composed of an exchange H directly managing a first mobile terminal PS-H and exchange V1 directly managing the other mobile terminals and when this first mobile terminals is moved into the exchange V1, bearing information including loaming information reported from these exchange V1 is reported from this exchange H to another exchange 01. When there is a call originating request from an arbitrary terminal existent in the other exchange 01, to which the bearing information is reported, to the first mobile terminal, the line path connecting the arbitrary terminal and the first mobile terminal is set so that the other exchange 01 does not pass the exchange H.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a route selection management system for a mobile terminal, and more particularly, to the same subscriber number even when the mobile terminal moves into an area of a switching center different from the switching center directly managed by the mobile terminal. The present invention relates to a route selection management system that realizes a roaming method that enables incoming connection with a mobile phone.

[0002]

2. Description of the Related Art
In Japan, a plurality of telecommunications carriers provide call and communication services by mobile terminals. However, the area where the telecommunications carrier provides the service is limited to each telecommunications carrier. For this reason, when a mobile terminal belonging to a certain telecommunications carrier moves to a service area of another telecommunications carrier, there arises an inconvenience that a call or the like cannot be performed.

Therefore, the mobile terminal is provided outside the service area of the exchange (hereinafter referred to as "home exchange") of the telecommunications carrier which directly assigns a subscriber number for identifying the mobile terminal and manages outgoing and incoming calls. "Roaming" is used so that you can use services such as calls even when you leave and move to the service area of an exchange owned by another communication carrier (hereinafter referred to as "visitor exchange"). A service called is provided. Hereinafter, the fact that the mobile terminal has moved into the visitor exchange will be referred to as that the mobile terminal is “in a roaming state” or “roamed”. Also, the fact that the mobile terminal is within the service area of the visitor exchange is "roaming" or "located".
I will call it.

When the mobile terminal enjoys the roaming service, a temporary subscriber number (hereinafter referred to as "roaming number") is assigned at the visitor exchange station to which the mobile terminal moves. However, when any subscriber attempts to call the mobile terminal, he does not know that the mobile terminal is roaming, so he dials the original subscriber number. That is,
This subscriber sends a call to the home exchange, knows that the destination mobile terminal is roaming according to the guidance from the home exchange, and then hangs up the phone without dialing the roaming number again. must not. Therefore, when trying to make a call to the mobile terminal, there is a problem that the dial must be used properly depending on whether the mobile terminal is roaming or not.

In order to solve this problem, the following roaming services have been proposed. In other words, the visitor exchange, which is the destination, notifies the home exchange of the mobile terminal of the roaming number that is temporarily assigned to the mobile terminal, and the home exchange has the original subscriber number of this mobile terminal. (Hereinafter referred to as "specific number") is stored in association with a roaming number. When a call is made to this roaming mobile terminal, the specific number is converted to a roaming number and sent to the visitor exchange. Allow the mobile terminal to receive an incoming call in the form of forwarding.

[0006] In a communication network spanning a plurality of operators who are provided with such roaming service, when an arbitrary subscriber makes a call to a roaming mobile terminal, the subscriber will move to the destination of this mobile terminal. It is not necessary to know the roaming number assigned by the visitor switching center, and the call can be easily made by using a single specific number. However, in this case, the convenience of general subscribers calling to the mobile terminal is improved, but the following problems occur.

FIG. 12 shows an explanatory diagram of the line route of the roaming service. Here, it is assumed that the mobile terminal (PS) 105 of the subscriber to which the original subscriber number (specific number) is assigned by the home exchange station 101 is moving within the service area of the visitor exchange station 102. At this time, the telephone set 10 of the other subscriber A accommodated in the other exchange 103
Consider the case where there is a call from 6 to the mobile terminal 105.

Since the specific number of the mobile terminal 105 is dialed from the telephone 106, the home exchange 101
A line route 1 to the home switching center 10 is set.
In 1, the specific number is converted into a roaming number, and the line route 2 to the visitor switching center 102 to which the roaming number is added is set. That is, in this case, the exchange 1
"Relay connection via home switching center" is performed from 03 to home switching center 101 and from home switching center 101 to visitor switching center 102.

Next, from the telephone 107 of the other subscriber B accommodated in the visitor exchange 102, which is the destination, to the mobile terminal 1
Consider the case where there is a call to 05. In this case also, since the specific number is dialed from the telephone set 107, the line route 2 from the visitor exchange 102 to the home exchange 101 is set, and the home exchange 101 converts the specific number into a roaming number. After that, the line route 2 from the home switching center 101 to the visitor switching center 102 is set. That is, two line paths are set between the visitor switching center 102 and the home switching center 101.

However, in the conventional line connection system shown in FIG. 12, a wasteful line route may be set, which may put pressure on the line traffic of the home switching center. That is, when dialing from the other subscriber A's telephone 106 to the mobile terminal 105 that has moved to the visitor switching center 102, the line route from the other switching center 103 directly to the visitor switching center 102 (dotted line in FIG. 12). Cannot be set, and a circuit connection is always made via the home switching center, which may cause pressure on the line traffic of the home switching center.

Further, when dialing from the telephone 107 housed in the visitor exchange 102 to the mobile terminal 105 that has moved to the same visitor exchange 102, the home exchange can be used regardless of whether the call is made or received within the same exchange. Two line routes via 101 are set, and completely useless line connection is performed. When a communication network is operated using such a roaming system, when the number of mobile terminals in the roaming state increases, the line traffic of the home switching center to which each mobile terminal belongs is squeezed and the communication network becomes congested. The probability becomes high, and there is a possibility that an undesired state of being unable to make a call may occur.

Therefore, the present invention has been made in consideration of the above circumstances, and while ensuring the originating operation by a single original subscriber number (specific number) in roaming of a mobile terminal, It is an object of the present invention to provide a route selection management system for a mobile terminal in which an optimum route that does not go through a home switching center of the mobile terminal is selected.

[0013]

SUMMARY OF THE INVENTION This invention comprises a switching center A that manages the first mobile terminal directly, a plurality of switching centers V _i to manage other mobile terminals directly (i = 1, ...... n) Consists of
If the first mobile terminal has moved to the switching center V _i, notifies the route information including the roaming information the switching center A is notified from the switching center V _i to certain other switching center Vk However, when there is a call origination request to the first mobile terminal from any terminal existing in the other switching center Vk to which the route information is notified, the other switching center Vk calls the switching center A. There is provided a route selection management system for a mobile terminal, characterized in that a line route connecting the arbitrary terminal and the first mobile terminal is set so as not to go through.

Here, the route information notified from the exchange A includes a number identifying the exchange A, a number identifying the exchange V _i, and a number identifying the first mobile terminal. , and a roaming number to the first mobile terminal is applied to the first mobile terminal when the mobile to the exchange V _i,
Switching center the route information is notified, it may set the line path by changing the originating request from the terminal to the roaming number to the numbers for specifying the switching center V _i.

Hereinafter, the switching center that directly manages the first mobile terminal is referred to as the "home switching center" of the mobile terminal, and
The first mobile terminal leaves the home exchange service area,
When moving to the service area of another exchange, this "other exchange" is called the "visit exchange" of the mobile terminal.

Further, the visitor exchange station includes roaming recognition means and recognizes that the first mobile terminal has moved into the station. For example, when the location registration or call origination operation is performed from the first mobile terminal that has moved into the visitor exchange, the first mobile terminal transmits a predetermined code number for identifying its own home exchange to the visitor exchange. As a result, the roaming recognition means of the visitor exchange can recognize that the first mobile terminal has moved and its home exchange.

Further, the visitor exchange station to which the first mobile terminal has moved is provided with roaming number assigning means, and the first mobile terminal is provided with a temporary provisional subscriber number for the visitor exchange station, that is, a roaming number. assign. This roaming number may be stored in the roaming number storage means that can be configured by a RAM or the like. Further, it is preferable that the visitor switching center includes roaming information generating means for generating roaming information and roaming information notifying means for notifying the home exchange of the roaming information.

The roaming information includes at least the information for identifying the first mobile terminal, the information for identifying the visitor exchange station, and the first information temporarily assigned by the visitor exchange station.
The subscriber number (roaming number) of the mobile terminal is included. Here, the information identifying the first mobile terminal is a subscriber number given by the home exchange. The information for identifying the visitor switching center is, for example, a node number given to each switching center in the communication network.

Further, it is preferable that the home exchange also includes roaming recognition means for receiving and recognizing the roaming information notified from the visitor exchange. The home exchange can recognize to which exchange the first mobile terminal directly managed by this notification is moving. The home exchange also has a means of storing this roaming information (R
AM).

Further, the home switching center is provided with route information notifying means and notifies the predetermined other switching center of the route information. The route information notified here includes a node number that is a number that identifies the visitor exchange station to which the first mobile terminal has moved and a roaming number that is assigned to the first mobile terminal. , Preferably including the node number of the home switching center and the subscriber number of the first mobile terminal at the home switching center.

The predetermined other exchanges notified of the route information from the home exchange are (1) all the exchanges existing in the subscriber telephone network, and (2) the first mobile terminal is currently in the service area. Only the visitor switching center of the moving destination that is currently operating, (3) The switching destination that the first mobile terminal is currently located and the switching center that has been in the past, (4) Call to the first mobile terminal An exchange that accommodates the terminal of the subscriber who has made the request, or
(5) It may be an exchange that accommodates the terminal of the subscriber who has made a call request from the first mobile terminal.

Then, the above-mentioned predetermined other switching center notified of the route information is provided with an information holding table for holding the route information. The information holding table is used to extract the node number and roaming number of the visited visitor switching center to which the first mobile terminal is moving so that the home switching center node number and the subscriber for identifying the first mobile terminal can be extracted. It is preferably stored in association with the number. Further, the predetermined other switching center includes a home station table for storing a preset number for specifying a home switching center and a visitor station table for storing a number for specifying a visitor conversion station. May be.

Generally, a calling request from a subscriber's terminal is
Although represented by a dial number, this dial number is composed of the number of the exchange station (called a special route number) accommodating the call request destination and the subscriber number of the call request destination. This route special number includes an H station route special number for identifying the exchange as a home exchange and a V station destination route special number for identifying as the visitor exchange, and the home station table includes: For example, a route special number node number conversion table for extracting the H station node number from the H station route special number can be used. As the visitor station table, for example, the V station node number to the V station destination route special number can be used. A node number / route special number conversion table for extraction can be used.

The switching center accommodating the above-mentioned arbitrary terminal is
A call origination request (that is, a dial number) from the arbitrary terminal to the first mobile terminal is separated into an H station route special number and a subscriber number of the first mobile terminal, and further, the above-mentioned information holding table and home station By referring to the table and the visitor station table, a number for identifying the visitor exchange station to which the first mobile terminal moves (for example, a special route address for station V)
And roaming numbers. Then, the line route for calling the first mobile terminal is set by the roaming number and the number for identifying the visitor switching center. by this,
You can set a circuit route that does not go through the home exchange.

Therefore, it is preferable that the above-mentioned predetermined other exchange station is provided with a line control means for performing connection processing through a line path, a dial conversion means for separating a dial number and extracting a desired roaming number and the like. In addition,
These constituent means can be realized by hardware logic, or a microcomputer and software.

Further, according to the present invention, when the first mobile terminal returns to the switching center A, the switching center A is switched to the switching center holding the route information immediately after the recovery or after a lapse of a predetermined time. A request may be made to release the route information, and the exchange that has received the release request may cancel the setting of the line route based on the route information for the first mobile terminal, or the exchange A The exchange that has received the notification of the route information regarding the first mobile terminal from the above discards the route information regarding the first mobile terminal after a certain time has elapsed after receiving the notification, and outputs the route information. The setting of the line route based on the above may be canceled.

Here, “immediately after the first mobile terminal returns to the home switching center” means immediately after the home switching center recognizes that it has returned. Further, the return can be recognized, for example, when the home exchange receives a request for location registration or a request for transmission from the first mobile terminal. The "constant time" after a lapse of a certain time after returning to the home switching center is preferably as long as possible (for example, 5 hours) when the roaming condition frequently occurs, and the roaming condition hardly occurs. In some cases, it should be as short as possible (for example, 10 minutes), and the optimum time depends on the place of use or person.

Further, in the case where the roaming state frequently occurs, the home switching center may notify the release of the route information after a lapse of a certain time after the first or last roaming. Alternatively, roaming frequency intervals and the like may be measured, and the cancellation of the route information may be notified when these measured values satisfy certain conditions.

Further, the above-mentioned fixed time may be set for each mobile terminal depending on a place to be used, a person, or a time zone. The "fixed time" after a certain time has elapsed after receiving the route information, the optimum time is not uniquely recognized, and differs depending on the time zone and the person used. Further, at the exchange that has received the notification of the route information, after the route information has been received and a state in which the originating operation to the first mobile terminal has not been performed for a certain period of time, the exchange is voluntarily operated. Alternatively, the route information may be discarded.

[0030]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described in detail below based on the embodiments shown in the drawings. The present invention is not limited by this. In the following embodiments, a mobile telephone is used as the mobile terminal, and a case where a call is originated is shown. However, another mobile wireless device may be used.

In the following, the switching center that directly manages the mobile telephone PS-H is called a home switching center (station H), and the switching center in which the mobile telephone PS-H is currently located is the visitor switching center (V1). Stations). Further, an exchange to which the mobile telephone has moved in the past is called an "old visitor exchange", and an exchange in the present area is called a "new visitor exchange".

First Embodiment: FIG. 1 shows a system configuration diagram of a first embodiment of the present invention. Here, when the mobile telephone (PS-H) accommodated in the home exchange (station H) is moving to the visitor (station V1), it is accommodated in another exchange (station O1). An example of optimum route control when a call is sent from the O1 station subscriber 41 to the mobile telephone (PS-H) will be described. With the following configuration and method, the visitor exchange station (V1 station) roaming from the O1 station subscriber 41 without going through the home exchange station (H station).
It becomes possible to make a direct call to.

In FIG. 1, base stations 50 and 51 are stations that directly control call origination / termination and a call with a mobile telephone by wireless communication. The home switching center (H station), the visitor switching center (V1 station) and the other switching center (O1 station) form a so-called subscriber telephone network, and the call lines 9401,
Connected at 9402 and 9403. Station H, station V1,
The O1 station has a route special number node number conversion table 800, a node number route special number conversion table 810, and an optimum route table 820, each of which plays an important role in selecting the optimum route.
Is provided. These tables can usually be constructed using RAM. Further, in FIG. 1, only the O1 station is shown, and the H station and the V1 station are omitted.

The call line controller 940 performs a connection operation for making and receiving a call and a call through the call line.
The maintenance console 991 is a terminal device for a maintenance person who performs maintenance management of this system to input a maintenance command and set route information, and a personal computer or the like can be used. Maintenance operation control unit 990
Is for analyzing a maintenance command input from the maintenance console 991 and setting information in the route special number node number conversion table 800 and the node number route special number conversion table 810.

The call control unit 900 is activated by the telephone line control unit 940 when a call origination request is made from the accommodated telephone. Further, the call control unit 900 extracts the dial number of the other party of the call given by the call origination request, activates the dial conversion control unit 901, and uses the information provided from the dial conversion control unit 901 to obtain the necessary information. Connect to the call line.

The dial conversion control unit 901 includes a call control unit 9
By separating the dial number given from 00 and referring to the three tables (800, 810, 820), the route special number and the roaming number for identifying the optimum route are extracted. Here, the given dial number is separated into a route special number of the station destination and a subscriber number. For example, the number that the subscriber actually dials is "700-
In the case of “1234”, “700” is a route special number for the H station destination, and “1234” is a unique PS-H subscriber number given to each subscriber.

Route special number node number conversion table 800
Is a node number peculiar to each exchange in the subscriber telephone network stored for each route special number of each exchange. This route special number node number conversion table 800 is the “route special number of station H” separated by the dial conversion control unit 901.
, And is used to extract the H station node number corresponding thereto. That is, the dial conversion control unit 901 extracts the “H station node number” stored in the area indexed by the “H station route special number” by referring to the route special number node number conversion table 800.

Node number / route special number conversion table 810
Is a unique route special number for making a call to each exchange in the subscriber telephone network, stored for each node number of each exchange. The node number / route special number conversion table 810 is used to extract the route special number of the visitor exchange station corresponding to the node number of the visitor exchange station of the roaming destination. That is, the dial conversion control unit 901
However, by referring to the node number / route special number conversion table 810, the "V1 station / route special number" stored in the area indexed by the "node number of the V1 station" of the roaming destination is extracted.

The optimum route table 820 stores the node number of the visitor exchange station at the roaming destination and the "roaming number" assigned by the visitor exchange station when the mobile telephone is roaming. These pieces of information stored in this optimum route table are the node number of the home exchange that originally accommodates the mobile telephone to be called and the original subscriber number (specific number) given to the mobile telephone. Is associated with.

The optimum route table 820 is used to extract the node number of the visitor switching center and the roaming number assigned by the visitor switching center from the node number and subscriber number of the home switching center of the mobile terminal. . That is,
The dial conversion control unit 901 refers to the optimum route table to correspond to the “H station node number” and the “subscriber number” extracted from the route special number node number conversion table 800 and the dial number. "V1 station node number" stored and "roaming number" at V1 station
Is extracted.

Among the above three tables, the route special number node number conversion table 800 and the node numbers and route special numbers of the respective exchanges used in the node number route special number conversion table 810 are assigned to these exchanges. Since it is decided when it is introduced into the subscriber telephone network, it is preset from the maintenance console 991 described above. The "visit switching center node number" and the "roaming number" stored in the optimum route table 820 are set by the information notified from the home switching center each time a certain mobile telephone moves to another switching center. It

Next, a specific example of route selection that does not go through the home exchange when the mobile telephone (PS-H) is in the roaming state will be described. FIG. 2 shows a system configuration diagram when the mobile telephone (PS-H) roams to the visitor exchange (V1 station). Here, the “H station route special number” and the “H station node number” of the home exchange (H station) of the mobile telephone (PS-H) are set to “1”,
The subscriber number (specific number) of the mobile telephone (PS-H) is "3000". Further, the "route special number" and the "node number" of the visitor exchange station (V1 station) are set to "710".

First, it is assumed that the mobile telephone (PS-H) has moved into the service area of the visitor exchange (V1 station).
At this time, the visitor exchange station (V1 station) recognizes that the mobile telephone (PS-H) has roamed to its own service area due to the power-on or calling operation of the mobile telephone (PS-H). This can be realized by providing the visitor exchange with a roaming recognition means using a radio signal reception means or a microcomputer. For example, when the power of the mobile telephone (PS-H) is turned on, the node number "1" of the home switching center (station H) and the subscriber number "3000" are sent from the mobile telephone (PS-H) to the visitor switching center (V1 station). ).

Next, at the visitor switching center (V1 station) which has recognized the roaming, the roaming number = “400” which is a temporary provisional subscriber number for the mobile telephone (PS-H).
0 "is assigned. The roaming number, the node number of the home switching center, etc. are stored in the optimum route table 820 of the visitor switching center (V1 station) corresponding to the roaming number storage means. Further, the visitor switching center (V1 station). ) Notifies the home switching center (station H) of roaming information indicating that the mobile telephone (PS-H) has roamed.This function is performed by LSI and hardware such as a microcomputer and a communication controller. It can be realized by logic and communication programs.

Here, the roaming information includes a node number = “2” and a roaming number = “4000” which are numbers for identifying a visitor exchange station (V1 station). Upon receiving this roaming information, the H station recognizes that the mobile phone (PS-H) under its own control is roaming to the visitor exchange station (V1 station) and recognizes the optimum route table of the H station. The roaming information is stored in a table corresponding to 820.

Then, the H station notifies the predetermined exchange station (O1 station) of the route information based on the roaming information. The means for notifying the route information can also be realized by a microcomputer, a communication controller, a communication program and the like. Here, as the predetermined exchange station, only one exchange station (O1 station) is shown in FIG. 2, but all exchange stations existing in the same subscriber telephone network are targeted.

In the route information notified, the node number of the visitor exchange station (V1 station) = “2”, the roaming number = “4000”, and the node number of the home exchange station (H station) = “1”. And the subscriber number of the mobile phone (PS-H) =
"3000" is included. The exchange station (O1 station) that has received the route information stores it in the optimum route table 820 corresponding to the information holding table.

That is, the visitor switching center (V1 station) is located at the position of the address in the optimum route table 820 corresponding to the subscriber number (= 3000) of the mobile telephone of the home switching center (H station node number = "1"). ) Node number = “2” and roaming number = “4000”. These pieces of information are referred to when the dial number conversion processing described later is performed. As described above, the information necessary for selecting the optimum route for making a call to the roaming mobile telephone is set.

Then, after this, from the telephone of the subscriber belonging to the exchange (O1 station), the mobile telephone (P
An example of line connection for making a call to S-H) will be described. Here, since the route special number of the exchange and the specific number of the mobile terminal are generally open numbers, when the O1 station subscriber 41 makes a call to the mobile telephone (PS-H),
"7003000" is dialed. Naturally, the O1 station subscriber does not know that the mobile telephone (PS-H) is roaming. This dial number is H station route special number =
It is a combination of "700" and the subscriber number (specific number) = "3000".

The exchange (O1 station) analyzes this dial number, and then uses the three tables (800, 800) shown in FIG.
810, 820) to directly visit the visitor switching center (V1
Convert to a dial number for calling a mobile phone (PS-H) roaming to a station. For this purpose, first, O
Dial number "700300" given by one subscriber
0 ”is the call control unit 900 through the call line control unit 940.
To the dial conversion control unit 901. The dial conversion control unit 901 displays the dial number “70
“03000” is a special number of the route of the exchange to which the call is requested = “70
0 "and the mobile phone subscriber number =" 3000 ".

Next, the dial conversion control unit 901 refers to the route special number node number conversion table 800, and the H station node number = “1” stored in the position of the H station route special number = “700”. To extract. Furthermore, the optimum route table 8
With reference to FIG. 20, it is searched whether or not the information exists at the position specified by the extracted H station node number = “1” and the subscriber number of the mobile telephone (PS-H) = “3000”.

When the information is present at the corresponding position by this search, it can be determined that the mobile telephone (PS-H) is roaming, so the dial conversion control unit 901
The node number = “2” and the roaming number = “4000” of the visitor exchange of the roaming destination are extracted. Further, the node number / route special number conversion table 810 is searched in order to extract the route special number of the visitor switching center of the roaming destination. Then, the route special number = “710” of the visitor exchange station located at the node number = “2” is extracted.

As described above, the route special number = “710” and the roaming number = “4000” of the visitor exchange station (V1 station) which is the roaming destination of the mobile telephone (PS-H) are recognized. Therefore, the dial conversion control unit 901
Returns "7104000" to the call control unit 900 as the number to be dialed. When the roaming number or the like is not found by searching the optimum route table 820, the dial number requested to be transmitted may be returned as it is.

After that, the call control unit 900 selects a call line based on the returned dial number "7104000" and performs a line connection operation through the call line control unit 940. That is, the call is directly transmitted to the visitor exchange station (V1 station) through the telephone line 9403. At this time, the telephone line 94
01, home switching center (station H), and telephone line 9402 are not used.

As described above, the home exchange of the mobile telephone notifies all the exchanges that the mobile telephone is roaming, so that each of the notified exchanges transmits the roaming mobile telephone. When making an outgoing call request, it is possible to select a line route that does not go through the home exchange. Therefore, it is possible to reduce extra relay traffic generated between the home switching center and the visitor switching center and shorten the connection time.

In the above embodiment, when the home switching center recognizes that the mobile telephone belonging to the home switching center roams, all the switching centers are notified of the route information. When a new mobile telephone is registered in the exchange, the "home switching center node number" is entered in the "visitor switching center node number of the destination" as route information from the home switching center, and the "roaming number" is entered. Put the "mobile phone subscriber number (specific number)" in
You may make it notify to all the exchanges. Further, the notification of the above-mentioned route information and the like can be performed through a signal line connected between each exchange station different from the telephone line.

FIG. 3 shows a system configuration diagram in the case of notifying route information using a signal line. Here, the home switching center (station H), the visitor switching center (station V1) and all other switching centers in the network are provided with a signal line control unit 930 for controlling connection with the signal line. The home exchange (station H) and the visitor exchange (V1 station) are connected by a signal line 9301,
The home switching center and the other switching centers are connected by different signal lines 930n.

The visitor exchange (V1) and other exchanges are
Update controller 9 for updating the optimum route table 820
21 is provided. The roaming controller 980 in the H station
This is a part to judge whether the mobile phone belonging to the station roams to another exchange or has returned to the H station, and is updated to notify the other exchange that the mobile phone has roamed or returned. The request control unit 911 is activated.

The update request control section 911 is a section which creates route information and notifies it to the V1 station and other exchanges.
As shown in FIG. 3, the signal sent through the signal line is the "optimum route information update request signal" for notifying the route information as a signal transmitted from the H station, and the V1 station and other exchanges. As a signal transmitted from the station, there is an "optimum route information update completion notification signal" or the like indicating that the notification has been updated.

Second Embodiment: In the first embodiment, an example is shown in which route information indicating roaming is notified to all exchanges in the subscriber telephone network, but in this case, a mobile telephone is currently in service. An example will be shown in which the route information is notified only to the visitor exchange station that is in operation, and only this visitor exchange station selects the optimum route. That is, consider the route selection when the mobile telephone roams to a certain visitor exchange (V1 station) and then roams to another visitor exchange (V2 station) without returning to the home exchange.

FIG. 4 shows a system configuration diagram of the second embodiment. Here, the home exchange (station H) includes a registration request control unit 912 and a cancellation request control unit 913. The registration request control unit 912 notifies other exchanges of the route information of the mobile phone belonging to the H station, and the release request control unit 913
This is to notify the other exchanges of the cancellation of the registered route information.

Registration controller 9 of the new visitor exchange station (V2 station)
22 is for registering the route information notified from the H station in the optimum route table 820. Visitor Exchange (V1
The cancellation control unit 923 of the (station) cancels the registered route information from the optimum route table 820. In the case of this embodiment, the optimum route table 820 is preferably a capture / release type table (821) so that the route information can be released as well as updated.

When the route information is registered through the signal lines 9301 and 9302, the "optimum route information registration request signal" and the "optimum route information registration completion notification signal" are transmitted, and the route information At the time of cancellation, the "optimum route information cancellation request signal" and the "optimum route information cancellation completion notification signal" are transmitted. The outline of the operation of this embodiment is shown below.

First, it is assumed that since the mobile telephone (PS-H) has roamed to the old visitor exchange (V1 station), the route information of this mobile telephone is registered in the old visitor exchange (V1 station). . In addition, from the H station to the mobile terminal (PS-
The fact that H) is roaming shall not be notified to other exchanges. At this time, mobile phone (PS-H)
However, new visitor exchange station (V2 station) without returning to H station
Consider the case of moving to.

When the new visitor switching center (V2 station) recognizes that the mobile telephone (PS-H) is roaming to the V2 station, it notifies the H station of roaming information regarding the mobile telephone (PS-H). And H station is a mobile phone (PS
-H) knows that it is roaming to the V2 station, the roaming control unit 980 notifies the V2 station of the registration request signal of the route information of the mobile telephone (PS-H) through the registration request control unit 912. To do. Here, the route information includes at least the node number of the new visitor exchange station (V2 station) at the roaming destination and the roaming number at the V2 station, as in the first embodiment.

After this notification, the H station further requests the V1 station to cancel the route information. That is, the roaming control unit 980 notifies the V1 station of the route information release request signal of the mobile telephone (PS-H) through the release request control unit 913. In the H station, as the roaming information of the mobile phone (PS-H), "V1" which is the previous roaming destination.
It is sufficient to overwrite “information indicating that the station has moved to the station” with “information indicating that the station has moved to the V2 station”.

At the V2 station which has received the route information registration request,
The registration control unit 922 registers the route information in the capture / release type optimum route table 821, and then transmits the “optimum route information registration completion notification signal” to the H station. Further, in the V1 station that has received the route information release request, the release control unit 923 releases the route information for which the release request has been made from the capture release type optimum route table 821, and thereafter, “optimum route information release completion. The notification signal "is transmitted to the H station. As described above,
The V1 station, which was the visitor exchange station where the previous mobile phone (PS-H) was located, is no longer the exchange station that selects the most suitable route, and the mobile phone (PS-H) is currently located. Only the visitor exchange station (V2 station) that is present can be the exchange station that selects the optimum route.

When all the exchanges in the subscriber telephone network store route information at the time of roaming as in the first embodiment, when the number of roaming mobile terminals is very large, A lot of route information is stored,
The load for notifying the route information may increase. However, by limiting the notification and storage of the route information to only the visitor exchange station which is currently roaming as in the second embodiment, the load of the notification of the route information can be reduced and the storage capacity can be reduced. it can.

Third Embodiment : Here, a mobile telephone (PS
-H) shows an embodiment in which all the exchanges that have been visited by the movement become the exchanges that make the optimum route selection.
FIG. 5 shows a system configuration diagram of the third embodiment. In the second embodiment, the H station issues a notification requesting the cancellation of the route information to the old visitor exchange station (V1 station) that was the previous roaming destination, but in the third embodiment, the update is performed. The difference is that the request control unit 911 requests the V1 station to update the route information. Therefore, the mobile telephone (P
S-H) needs to store all information about the exchange that has roamed, at least the node number of the exchange. Selected station registration table 830 in FIG.
Stores such a node number.

Further, the mobile switching center to which the mobile telephone (PS-H) has roamed, the roaming information about the mobile telephone (PS-H), at least the node number and the specific number of the H station, and the current mobile telephone (PS). -H) needs to store the information (node number and roaming number) of the visited visitor switching center that is roaming. By doing this, the mobile telephone (PS-H) sets the newly roaming visitor switching center as the switching center (referred to as "optimum route selection station") that selects the optimum route, and now An exchange station that has roamed before may continue to operate as an optimal route selection station.

Since it is considered that these optimum route selection stations are likely to carry out outgoing / incoming operations with respect to this mobile telephone, the relay traffic passing through the H station is kept as low as possible and route selection is also performed. Therefore, it is possible to reduce the storage capacity and the load of notification. Each control unit shown in the figure can be realized by a hardware logic or a microcomputer.

FIG. 6 shows a concrete example of a table for storing route information in the third embodiment. Here, the V1 station is an old visitor exchange station to which the mobile telephone (PS-H) has roamed, and the mobile telephone (PS-H) is currently V2.
Suppose you are roaming to a station. Mobile phone (PS-
The route special number of the home exchange center (H station) of H) is "700",
The node number is "1" and the subscriber number (specific number) at the H station of the mobile telephone is "3000".

Further, the route special number of the V1 station is "710", the node number "2", the roaming number of the mobile telephone (PS-H) is "4000", and the route special number of the V2 station is "72".
0 ", node number is" 3 ", roaming number is" 500 "
As described above, the H station is provided with the selected station registration table 830. In this table, for each mobile telephone managed by the own station, the optimal route selection station for that mobile telephone is set. The node numbers of all exchanges operating as are stored in this example.In this example, when the mobile telephone (PS-H) is roaming to the V1 station, the optimum route selection node number = “2”. "Is stored, but after roaming to the V2 station, the node number" 3 "of the V2 station is newly added, and the optimum route selection station node number =
It becomes "2" and "3".

In the V2 station, the optimum route table 82
As a specific example of 0, a capture / release type optimum route table 821 as shown in FIG. 6 is provided. This table is provided for each switching center existing in the network, and when the mobile telephone accommodated in a certain switching center is roaming, all the optimum route selection stations for the mobile station are assigned with the mobile telephones. The route information is stored as one block. This block is not a reserved area that is uniquely reserved for each mobile phone, but can be used as an in-use area by acquiring an area if necessary, and can be made as an unused area by discarding the area. it can. Here, it is shown that the area of “block number” = “Z” is newly captured and the route information of this mobile telephone (PS-H) is stored in this area.

For example, the conversion source node number = "1" indicates the home exchange (station H), and the conversion source extension number = "300".
0 "indicates the specific number at the H station of the mobile telephone (PS-H), the conversion destination node number =" 3 "indicates the node number of the currently roaming exchange, that is, the V2 station, and the conversion destination extension number. = “5000” indicates the roaming number in the V2 station, and the H station and the V1 station also have the optimum route table of the capture / release type, where the “block number” in the H station = It is shown that the route information of the mobile telephone (PS-H) is stored in the area of X, and in the area of “block number” = “Y” in the V1 station. Further, in the blocks in the H station and the V1 station, when the mobile telephone (PS-H) is roaming to the V1 station,
"Conversion destination node number" = "2" and "Conversion destination extension number"
= “4000” is stored, but the mobile phone (PS
-H) roams to the V2 station, the “conversion destination node number” =
It is rewritten to “3” and “conversion destination extension number” = “5000”.

Fourth Embodiment: While the mobile telephone (PS-H) belonging to the home exchange (station H) is roaming to the visitor exchange (station V1), it is accommodated in another exchange (station O2). From the subscriber's telephone set 42, the mobile telephone (PS-
Suppose there is a call request to H). After that, it is considered highly likely that an outgoing / incoming call operation will be performed between this exchange (O2 station) and the mobile telephone (PS-H), and the exchange (O2 station)
Is an optimum route selection station, which is advantageous for reducing relay traffic.

Here, from the H station, such an exchange (O
An example in which route information is notified to (2 stations) will be shown. FIG. 7 shows a system configuration diagram of the fourth embodiment. Similar to the third embodiment, the switching center (O2 station) also has the registration control unit 92.
2 is provided, and the route information is written in the capture / release type optimum route table 821.

Now, the mobile telephone (PS-H) belonging to the home exchange (station H) is currently the visitor exchange (V1).
Suppose you were roaming. Further, it is assumed that the H station stores information indicating that the mobile telephone (PS-H) is roaming to the visitor exchange station (V1 station) in the acquisition and release optimal route table 821 of the H station. At this time, consider a case where an O2 station subscriber belonging to another exchange station (O2 station) makes a call request to the mobile telephone (PS-H).

The exchange (O2 station) activates the call control unit 900 to notify the home exchange (H station) of the call origination request. As mentioned above, the outgoing call request includes the special route number of station H,
The specific number of the destination mobile phone, other exchanges (O2
Station) special number, subscriber number of the calling telephone, etc.

At the home switching center (station H), in response to the call origination request, the call control unit causes the mobile telephone (PS) which is the connection destination.
-H) is currently roaming.
When the H station refers to the capture and release optimal route table 821 and recognizes that the mobile telephone (PS-H) is roaming, the roaming transfer control unit 902 is activated. The roaming transfer control unit 902 extracts the node number of the exchange requesting exchange (O2 station) from the information included in the call origination request, and knows that the node number is not registered in the selected station registration table. That is, the subscriber 42
If the switching center (O2 station) accommodating the service is not the switching center that selects the optimum route for PS-H, the registration request control unit 912 is activated.

The registration request control unit 912 controls the other exchange (O2
The station) is notified of route information indicating that the mobile phone (PS-H) is currently roaming. That is, the "optimum route information registration request signal" is notified to the other exchange (O2 station) via the signal line control unit 930. As shown in the first embodiment, the route information notified by this signal includes the node number of the current mobile telephone (PS-H), the node number of the visitor switching center (V1 station), and the original number of the H station. The subscriber number and the roaming number at the visitor exchange (V1 station) are included.

After that, in the other exchange (O2 station), the registration controller 922 sets the route information of the mobile telephone (PS-H) in the optimum route table 821 of the capture and release type, and the signal line controller. 930 returns an “optimum route information registration completion notification signal” to the H station. Then, the H station receives this “optimum route information registration completion notification signal” and selects the selected station registration table 830.
The node number of the O2 station is additionally set in.

In this way, the switching center (O2 station) accommodating the telephone requesting the call to the mobile telephone (PS-H) currently roaming is set to the optimum route for the mobile telephone (PS-H). It can be operated as a selected station. It can be said that there is a high possibility that an outgoing / incoming operation with the mobile telephone (PS-H) will be performed thereafter through the exchange that accommodates the telephone that has once performed the outgoing operation to the mobile telephone (PS-H). Therefore, if route selection is set as in this embodiment, it is possible to reduce relay traffic and reduce the load of notification of route selection. Also in this embodiment, each control unit is realized by a hardware logic or a microcomputer and a program.

Fifth Embodiment: Here, when the mobile telephone (PS-H) is currently roaming to the visitor switching center (V1 station), the mobile telephone (PS-H) switches to another switching center (PS-H). An embodiment will be described in which, when a call request is made to the telephone set of the O3 station subscriber 43 accommodated in the O3 station), the O3 station is used as the optimum route selection station.

FIG. 8 shows a system configuration diagram of the fifth embodiment. Here, the O3 station is an exchange that does not store route information about the mobile telephone (PS-H). In the V1 station, when the current V1 station makes a call from the roaming mobile phone, the outgoing call connection control unit 904 obtains the route information of the mobile phone to the exchange that accommodates the destination terminal. This is the part that controls to notify the user to do so. Further, the registration instruction request control unit 916 generates a "roaming notification signal" for notifying the acquisition instruction of the route information.

Further, the inquiry request control unit 917 in the O3 station inquires of the home exchange (H station) to acquire the route information of the mobile telephone "optimum route information inquiry signal". Is to be notified. All other control units in FIG. 8 are the same as those in the above-described embodiment, and all these control units can be realized by hardware logic or a microcomputer and a program.

In FIG. 8, it is assumed that the mobile telephone (PS-H) currently roaming to the V1 station requests the telephone of the O3 station subscriber 43 accommodated in the O3 station. At this time, the call control unit 900 of the V1 station determines that the call line 9
A call origination request is transmitted to the O3 station through 405 to perform a line connection operation. Further, when the call control unit 900 of the V1 station analyzes the call origination request from the mobile telephone (PS-H), it knows that the call is from the telephone that is currently roaming to its own station. To start.

The outgoing connection control unit 904 is connected to the call control unit 900.
If it is determined that the call is from a telephone that does not belong to itself, the call request information is given and the registration instruction request control unit 916 is activated. The registration instruction request control unit 916 uses the information of the call origination request to generate a "roaming notification signal" for instructing the home switching center to obtain route information about the mobile telephone (PS-H). . This signal includes the node number of the home switching center of the mobile telephone (PS-H), the specific number of the mobile telephone, the node number of the V1 station, the roaming number, and the like.

Next, the signal line control unit 930 of the V1 station
This "roaming notification signal" is transmitted on the signal line 9306 to notify the O3 station. After that, when the signal line control unit 930 of the O3 station receives the "roaming notification signal",
The inquiry request control unit 917 is activated. The inquiry request control unit 917 sends the "optimum route information inquiry signal" to the home exchange (station H) through the signal line 9305 using the information included in the "roaming notification signal". . This signal includes the node number of the home switching center of the mobile telephone (PS-H), the specific number of the mobile telephone (PS-H), and the node number of the O3 station.

Upon receiving this signal, the registration request control unit 912 of the H station recognizes that the O3 station is not registered in the selected station registration table 830, and then the mobile telephone (PS-H).
The operation of notifying the O3 station of the route information about That is, the registration request control unit 912 retrieves the route information about the mobile telephone (PS-H) from the capture release type optimum route table 821 of the H station, and through the signal line control unit 930 to the O3 station as described above. The "optimum route information registration request signal" is notified.

Upon receiving the "optimum route information registration request signal", the O3 station stores the route information relating to the mobile telephone in this signal in the capture / release type optimal route table 821,
The “optimum route information registration completion notification signal” is returned to the H station. Further, at the H station, the selection registration table 830 displays O
Set the node numbers of 3 stations. In this way, the O3 station newly becomes the optimum route selection station in response to the registration request of the optimum route information from the H station.

Further, the O3 station has already received the mobile telephone (PS
Whether or not it is the optimum route selection station for -H) may be performed by the O3 station receiving the "roaming notification signal" by searching the acquisition / release type optimum route selection table 821. As a result, when any subscriber of the O3 station thereafter makes a call to the mobile telephone (PS-H), the transfer from the O3 station to the V1 station is performed without performing the transfer via the home exchange (H station). Direct line settings are made.
According to the fifth embodiment, especially the O3 station subscriber 43
Is effective when making a call to a mobile phone (PS-H). Also, in the case of the fifth embodiment, the same effect as that of the fourth embodiment is obtained.

Sixth Embodiment: Here, when the mobile telephone (PS-H) roaming to the visitor exchange is restored to the home exchange (H), the mobile telephone (PS-H).
An example will be shown in which each switching center that has stored the route information of 1 is notified to cancel the route information of the mobile telephone (PS-H).

FIG. 9 shows a system configuration diagram of the sixth embodiment. First, information is transmitted from the mobile phone (PS-H) to the base station 51 of the H station by turning on the power of the mobile phone (PS-H) or performing a position registration or a calling operation. This information includes mobile phone (PS
-H) includes the specific number at the H station. The roaming control unit 980 of the H station can recognize that the mobile phone (PS-H) has returned to the H station by checking the transmitted information.

Thereafter, the optimum route selection station (V1, V2 in FIG. 9,
For the V3 station, the route information of the mobile telephone (PS-H) is canceled and the exchange station information of the selected station registration table 830 at the H station is deleted. (1) The release request control unit 913 of the H station transmits the “optimum route information release request signal” to all the optimal route selection stations (V1, V2, V3 stations) all at once. In this signal, H
“Node number of H station”, “mobile phone (PS) obtained by referring to the acquisition and release optimal route table of the station
-H) specific number "and" roaming number ". The information of the optimum route selection station to be transmitted is obtained by extracting all the node numbers of the exchange stations in the selection station registration table 830.

(2) In all the exchanges (V1, V2, V3 stations) that have received the "optimum route information release request signal", the release control unit 923 causes the capture release type optimum route table 821 to be stored. Search for a block that stores information about the mobile phone (PS-H) of
That is, the route information of the mobile telephone (PS-H) is deleted. (3) After this, the signal line control unit 930 of each visitor switching center
Sends an "optimum route information cancellation completion notification signal" to the H station through each signal line. (4) When the H station receives the "optimum route information cancellation completion notification signal", the cancellation request control unit 913 of the H station uses the "optimum route information cancellation completion notification signal" from the selected station registration table 830. Delete the information (node number) of the optimum route selection station that sent the message.

As described above, when the H-station recognizes that the mobile telephone (PS-H) has returned to its home switching center (H-station), it is stored in all the optimum route selection stations. Since the route information of the mobile telephones (PS-H) that had been used can be released all at once, the memory reserved for storing the route information can be effectively used.

Seventh Embodiment: In the sixth embodiment, the case where the route information of the mobile telephones (PS-H) is released all at once is shown. Here, the H station is provided with a "all release timer", An example will be shown in which the route information is released all together after a predetermined time has elapsed after the occurrence of a predetermined state.

FIG. 10 shows a system configuration diagram of the seventh embodiment. Here, the H station includes a “simultaneous cancellation timer control unit” 960 for starting and monitoring the simultaneous cancellation timer. The conditions for activating the simultaneous release timer are, for example, when the mobile phone (PS-H) returns to the H station, when the mobile phone (PS-H) roams to an exchange other than the H station for the first time, or at the end. (That is, presently) the mobile telephone (PS-H) may have moved to the visitor exchange station in which the mobile telephone (PS-H) is located.
It can be selected by 40.

When the roaming controller 980 of the H station recognizes that one of these conditions is satisfied, the simultaneous timer controller 960 is activated. The simultaneous timer control unit 960 starts counting of the simultaneous release timer for a certain fixed time and monitors the timeout. After that, when the simultaneous release timer control unit 960 detects the expiration of the simultaneous release timer, it requests all the optimum route selection stations to release the route information of the mobile telephone (PS-H). Subsequent processing is the same as in the sixth embodiment described above.

With the above arrangement, the mobile telephone (PS-
H) returns to the H station or after a certain period of time has elapsed from the time when roaming occurred, route information can be released all at once, so relay traffic can be reduced more appropriately and memory can be used effectively. . That is, for example, when a subscriber telephone network is configured in such a manner that a plurality of exchanges are installed in the same building, roaming frequently occurs among a plurality of exchanges due to mobile telephones moving around in the building, or to a home exchange. A return will occur. In this case, it is possible to reduce relay traffic for roaming rather by performing simultaneous release after returning to the home switching center or after roaming occurs and after a certain period of time has elapsed.

Eighth Embodiment: In the seventh embodiment, an H-station is provided with a "simultaneous cancellation timer" to simultaneously cancel the route information after a certain period of time has passed. An example in which an "individual cancellation timer" is provided for each visitor and each visitor switching center individually cancels the route information of the mobile telephone (PS-H) after a predetermined period of time has elapsed is shown.

FIG. 11 shows a system configuration diagram of the eighth embodiment. Here, the optimum route selection station (V1 station, V2 station) is
An "individual release timer control unit" for starting and monitoring the "individual release timer" is provided, and an individual release selection table 850 is provided. As a condition for activating the individual release timer, for example, when the route information regarding the mobile telephone (PS-H) is stored, or after the route information is stored, the mobile telephone (PS-H) is further stored. The last incoming call to or the last outgoing call from the mobile telephone (PS-H) may have been detected, and these conditions can be selected by the individual release selection table.

When either of these conditions is met, the registration controller 922 of each exchange or the call controller 9
When 00 is recognized, the individual release timer control unit 970 is activated. The individual release timer control unit 970 starts counting of the individual release timer for a certain fixed time,
Watch for timeouts. However, when the last incoming call to this mobile telephone (PS-H) or the last outgoing call from this mobile telephone (PS-H) is detected after storing the route information, this state occurs and the call is made. Will time out after a certain period of time without occurrence of.

After the occurrence of the above condition, at the visitor switching center in which the mobile telephone (PS-H) is currently located,
Incoming call to mobile phone (PS-H)
(S-H), the individual release timer control unit 970 resets the individual release timer,
The counting is started again from the initial value.

Similarly, at the optimum route selection station which does not currently have the mobile telephone (PS-H) but stores route information regarding the mobile telephone (PS-H), this visitor exchange is performed. When a call from any telephone belonging to the station to the mobile telephone (PS-H) is detected, the individual release timer is reset and the counting is started again from the initial value.

Thereafter, the individual release timer control unit 970
However, when the expiration of the individual release timer is detected, the release control unit 923 is activated, and the mobile telephone (PS-) stored in the capture / release optimal route table 821 that has been captured.
The information of H) is released, and further, the “optimum route information cancellation completion notification signal” is notified to the H station through the signal line control unit 930. In the H station that receives this notification, the cancellation request control unit 913 deletes the node number of the optimum route selection station that has notified the “optimum route information cancellation completion notification signal” from the selection station registration table 830. To do.

With the above arrangement, the mobile telephone (PS-
H) If the optimum route selection station storing the route information has stored a certain period of time after storing the information, or after storing the information, a further certain period of time without the occurrence of a call. When the time elapses, the route information can be canceled individually in the own station, so that the relay traffic can be reduced more appropriately and the memory can be effectively used. By setting the activation condition of the individual release timer as "non-execution", the individual release timer can be stopped so that the individual release of the route information is not executed spontaneously.

[0109]

According to the present invention, when the mobile telephone moves to the visitor switching center, it is possible to set a line route that does not pass through the home switching center of the mobile telephone. Therefore, between the home switching center and the visitor switching center. It is possible to reduce unnecessary relay traffic and reduce connection time.

[Brief description of the drawings]

FIG. 1 is a basic system configuration diagram in a first embodiment of the present invention.

FIG. 2 is an explanatory diagram of a specific example when the mobile telephone roams to the visitor exchange in the first embodiment of the present invention.

FIG. 3 is a system configuration diagram in the case of notifying route information using a signal line in the first embodiment of the present invention.

FIG. 4 is a system configuration diagram of a second embodiment of the present invention.

FIG. 5 is a system configuration diagram of a third embodiment of the present invention.

FIG. 6 is an explanatory diagram of a table that stores route information according to the third embodiment of the present invention.

FIG. 7 is a system configuration diagram of a fourth embodiment of the present invention.

FIG. 8 is a system configuration diagram of a fifth embodiment of the present invention.

FIG. 9 is a system configuration diagram of a sixth embodiment of the present invention.

FIG. 10 is a system configuration diagram of a seventh embodiment of the present invention.

FIG. 11 is a system configuration diagram of an eighth embodiment of the present invention.

FIG. 12 is an explanatory diagram of a line path of a conventional roaming service.

[Explanation of symbols]

 41 O1 station subscribers 50, 51 Base station 800 Route special number node number conversion table 810 Node number Route special number conversion table 820 Optimal route table 821 Capture / release type optimal route table 900 Call control unit 901 Dial conversion control unit 940 Call Line control unit 990 Maintenance operation control unit 991 Maintenance console 9401, 9402, 9403 Call line

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hoichi Tsujino 1015 Kamiodanaka, Nakahara-ku, Kawasaki, Kanagawa Kansai Communication Systems Co., Ltd. (72) Hideaki Shimizu 1015 Kamitadanaka, Nakahara-ku, Kawasaki, Kanagawa Kansai Communication Systems Co., Ltd. (72) Inventor Junichi Miyake 1015 Kamiodanaka, Nakahara-ku, Kawasaki-shi, Kanagawa Fujitsu Kansai Communication Systems Co., Ltd.

Claims (8)

[Claims] 1. An exchange A directly managing the first mobile terminal.
, And a plurality of exchanges Vi (i =
1, it because ...... n) and, when the first mobile terminal has moved to the switching center V _i, route information including roaming information the switching center A is notified from the switching center V _i To a predetermined other switching center Vk, and if there is a call origination request to the first mobile terminal from any terminal existing in the other switching center Vk to which the route information is notified, the other The switching center Vk of the mobile terminal sets a line route connecting the arbitrary terminal and the first mobile terminal so as not to go through the switching center A. 2. The route information notified from the exchange A includes a number that identifies the exchange A, a number that identifies the exchange V _i, and a number that identifies the first mobile terminal. and a roaming number to the first mobile terminal is applied to the first mobile terminal when the mobile to the exchange V _i, the route information is notified switching center, originating request from the arbitrary terminal route selection management system of the mobile terminal according to claim 1, wherein setting the line route change in number and the roaming number for identifying the mobile switching center V _i a. 3. When the first mobile terminal moves to an arbitrary switching center, all the switching centers hold the route information notified by the switching center A. Item 1. A management system for selecting a final route of a moving end according to Item 1. 4. The exchange station that holds the route information about the first mobile terminal notified by the exchange station A is only the destination exchange station in which the first mobile terminal is currently located. The route selection management system for a mobile terminal according to claim 1, wherein 5. The switching center that holds the route information about the first mobile terminal notified by the switching center A is the destination to which the first mobile terminal is currently located and the past. The route selection management system for a mobile terminal according to claim 1, wherein the exchange is a switching center that has been in the service area. 6. The terminal of a subscriber who has made a call request to the first mobile terminal by an exchange station that holds the route information about the first mobile terminal notified by the exchange A. 2. The route selection management system for a mobile terminal according to claim 1, which is a switching center that accommodates the terminal, or a switching center that accommodates the terminal of the subscriber whose call origination request is made from the first mobile terminal. 7. When the first mobile terminal returns to the mobile switching center A, the mobile switching center A sends the route information to the mobile switching center which holds the route information immediately after the mobile terminal returns or after a certain time elapses. 7. The switching center which has requested the cancellation of the request, and the exchange which has received the cancellation request cancels the setting of the line route based on the route information for the first mobile terminal. A route selection management system for mobile terminals. 8. The switching center, which has received the notification of the route information on the first mobile terminal from the switching center A, receives the notification and, after a certain time has elapsed, receives the notification and then the route for the first mobile terminal. 7. The route selection management system for a mobile terminal according to claim 1, wherein the information is discarded and the setting of the line route based on the route information is canceled.