JP3748776B2 - Mobile communication system and number conversion method thereof - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mobile communication system and its number conversion method.
[0002]
[Prior art]
FIG. 1 is a diagram showing an example of a system configuration of a conventional mobile communication system.
[0003]
The mobile communication system is an existing PDC-type mobile communication system, and corresponds to at least the mobile device 100, the radio control stations 201 and 202 , the subscriber level switch 300, the gateway switch 400, and the position number. The center 501 and 502 are comprised.
[0004]
In such a system, even if the call number is the same from the mobile device 100, if the call is from the area of position number 1, the call is from the center corresponding to position number 1 and the area of position number 2. For example, it includes a logical number such as 110 or 119, toll-free (service name), dial Q2 (service name), etc. ”Is dialed (circled 1 in FIG. 1), the subscriber-level switch 300 responds to such a call depending on which subordinate area the call originates from. It has a conversion table that determines whether it should be connected to (incoming call number, physical number), performs number conversion based on the table (circled 2 in FIG. 1), and converts the converted number, Ie the called number by (physical number), connected to the center 502 corresponding to the position number 2 by gateway exchange 400 is performed (circled 3 in FIG. 1).
[0005]
[Problems to be solved by the invention]
However, the conventional mobile communication system has the following problems when the area where the mobile device 100 is located during a call changes.
[0006]
FIG. 2 is a diagram showing an example of handover in a conventional mobile communication system.
[0007]
In the conventional mobile communication system, even when the mobile device moves across the area during communication, the call control (node subscriber switch 1 (301)) starts to hold the call control first (FIG. 2). (1)). This is commonly referred to as “subscriber line extension”.
[0008]
Accordingly, when the subscriber line is extended, when a “number that changes the connection destination depending on the location location” is dialed as a new call, the call is controlled by the subscriber-level switch 1 (301) (FIG. 2). (2)).
[0009]
However, since the wireless zone of position number 3 is not a subordinate area of the subscriber-level switch 1 (301), the subscriber-level switch 1 (301) cannot cope with its own conversion table and cannot perform appropriate number conversion. ((3) in FIG. 2).
[0010]
In order to enable connection in such a case, if each exchange has a conversion table of numbers corresponding to all areas, the station data of each exchange will be very large, and connection There is a problem that it is necessary to update the data of all the exchanges every time the destination or zone changes.
[0011]
Further, for example, a method of preparing a number management database aggregated in the network as in a system having only one home location register in the network is conceivable. In the case of holding a register, etc., there is a problem that it is inefficient and the amount of development becomes large.
[0012]
In view of the above problems, an object of the present invention is to provide a mobile communication system and a number conversion method thereof in which an exchange can inquire a representative station of another exchange or a radio control station.
[0013]
[Means for Solving the Problems]
In order to achieve such an object, according to the first aspect of the present invention, in a call originated from a terminal located in a coverage area of a first radio control station, a dial number of the call is stored in the area. Calling from a first exchange having a conversion table for converting to a corresponding connection destination number, means for controlling the call and extending the subscriber line, and a terminal located in the coverage area of the second radio control station And a second exchange having a conversion table for converting a dial number of the call into a connection destination number corresponding to the area, and means for controlling the call and extending a subscriber line. In the communication system, the first exchange is called from a terminal that is in the coverage area of the second radio control station having a first call that is extended by a subscriber line by the first exchange. Second call dial Means for receiving the items, the position number indicating the position of the terminal, means for obtaining the identifier for identifying the second exchange, the dialed number and the position number, the first being identified by the identifier Means for transmitting to the second exchange, the second exchange searches the conversion table for a connection destination number corresponding to the received dial number and the location number, and finds the connection destination number in the first exchange Means for transmitting to the exchange, and the first exchange comprises means for connecting to the received connection destination number corresponding to the dial number of the second call.
[0014]
According to a second aspect of the present invention, in the mobile communication system according to the first aspect, the first exchange further comprises means for recording the connection destination number.
[0015]
According to a third aspect of the present invention, in the mobile communication system according to the first aspect, the second exchange includes the conversion table including the received dial number and a connection destination number corresponding to the position number. The apparatus further comprises means for transmitting to the first exchange, and the first exchange further comprises means for recording the received conversion table .
[0016]
The invention according to claim 4 is a conversion table for converting a dial number of the call into a connection destination number corresponding to the area for a call originated from a terminal located in the coverage area of the first radio control station. And a dial number of the call for a call originated from a terminal located in a coverage area of a second radio control station, and a first switch having means for controlling the call and extending a subscriber line In the number conversion method for a mobile communication system, comprising: a conversion table for converting a telephone number into a connection destination number corresponding to the area; and a second switch having a means for controlling the call and extending a subscriber line. In the first exchange, the second call originated from the terminal located in the coverage area of the second radio control station having the first call extended by a subscriber line by the first exchange. Receive dialed number A step, a position number indicating the position of the terminal, obtaining the identifier for identifying the second exchange, the dialed number and the position number, the second exchange identified by the identifier Transmitting, and in the second exchange, searching the connection table corresponding to the received dial number and the location number from the conversion table, and transmitting the connection number to the first exchange. The first exchange includes a step of connecting to the received connection number corresponding to the dial number of the second call.
[0017]
According to a fifth aspect of the present invention, in the number conversion method for a mobile communication system according to the fourth aspect, the first exchange further includes a step of recording the connection destination number.
[0018]
According to a sixth aspect of the present invention, in the number conversion method for a mobile communication system according to the fourth aspect, the second exchange includes the connection number corresponding to the received dial number and the location number. The method further comprises a step of transmitting a conversion table to the first exchange and a step of recording the received conversion table in the first exchange .
[0019]
According to the above configuration, all exchanges can use all conversion tables as long as each exchange has a number conversion table for its subordinate area. Appropriate number conversion corresponding to the location location can be performed for outgoing calls.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0021]
FIG. 3 is a diagram showing an example of a system configuration of a mobile communication system to which the present invention is applied, and conceptually shows only a part related to the present invention in the configuration of the system. In the following embodiments, a case where an existing PDC mobile communication network is used will be described as an example.
[0022]
This system includes at least a mobile device 100, radio control stations 201 to 204 , subscriber-level switch devices 301 and 302 , a gateway switch device 400, and centers 502 and 503 corresponding to position numbers.
[0023]
In the mobile communication system of the present invention, the identifier representing the position number includes a number that can uniquely identify the subscriber floor switch or the radio control station ((1) in FIG. 3). Then, the subscriber-level switch (subscriber-level switch 1 (301)) that performs call control uses the identifier as a subscriber-level switch (subscriber-level switch 2 (302)) subordinate to the area in which it is located. Determine ((2) in FIG. 3). Then, the subscriber-level switch 1 (301) makes an inquiry to the subscriber-level switch 2 (302) and uses the conversion table of the subscriber-level switch 2 (302) to receive an incoming call corresponding to the area of position number 3. The number is acquired ((3) in FIG. 3).
[0024]
With the introduction of such a representative station inquiry procedure, all subscriber floor switches will use all conversion tables as long as each subscriber floor switch has a number conversion table for its subordinate areas. Therefore, even when a call is made when the subscriber line is extended, appropriate number conversion corresponding to the location location can be performed.
[0025]
(Operation of mobile communication system)
Next, an example of the operation of the mobile communication system in the present embodiment configured as described above will be described in detail with reference to FIG. 4 and FIG.
[0026]
FIG. 4 is a diagram showing an example of a communication sequence when the radio network controller manages the latest position information in a mobile communication system to which the present invention is applied. It shows conceptually.
[0027]
In this figure, a case where the radio control station manages the latest position information of the mobile device 100 will be described as an example. When the second call is transmitted from the mobile device 100 during the communication of the first call (step S402) (step S404), a response is transmitted from the subscriber floor switch 1 (301) to the mobile device 100. (Step S406).
[0028]
Next, the location information is inquired from the subscriber floor switch 1 (301) to the radio control station 2 (202) (step S408), and the radio control station 2 (202) is updated when the subscriber line is extended. The latest position information is referred to (step S410), and a response is transmitted (step S412).
[0029]
Next, the subscriber floor switch 1 (301) identifies the subscriber floor switch 2 (302) from the received location information in the response (step S414), and the subscriber floor switch 2 (302) An inquiry request is made (step S416).
[0030]
Next, the subscriber-level switch 2 (302) searches for a connection destination number (incoming number) from the received position information and dial number (step S418), and transmits a response (step S420).
[0031]
Next, the subscriber floor switch 1 (301) connects to the center 503 corresponding to the position number 3 based on the received connection destination number (step S422).
[0032]
FIG. 5 is a diagram showing an example of a communication sequence when the exchange manages the latest position information in the mobile communication system to which the present invention is applied, and conceptually shows only a part related to the present invention in the communication sequence. It shows.
[0033]
In this figure, a case where the latest position information of the mobile device 100 is managed by an exchange (for example, a subscriber floor exchange) will be described as an example. When the second call is transmitted from the mobile device 100 during the communication of the first call (step S502) (step S504), a response is transmitted from the subscriber level switch 1 (301) to the mobile device 100. (Step S506).
[0034]
Next, in the subscriber level switch 1 (301), the subscriber level switch 2 (302) is identified from the position information (step S508), and a representative station inquiry request is made to the subscriber level switch 2 (302). (Step S510).
[0035]
Next, the subscriber-level switch 2 (302) searches for the connection destination number (incoming number) from the received position information and dial number (step S512), and transmits a response (step S514).
[0036]
Next, the subscriber floor switch 1 (301) connects to the center 503 corresponding to the position number 3 based on the received connection destination number (step S516).
(Representative station inquiry procedure)
An embodiment of the representative station inquiry procedure of the present invention will be described in detail with reference to FIG.
[0037]
FIG. 6 is a diagram showing an example of a representative station inquiry procedure in the mobile communication system of the present invention.
[0038]
The embodiment A in FIG. 6 shows a case where the exchange 1 only refers temporarily to the conversion table of the exchange 2 and does not hold it.
[0039]
The embodiment B in FIG. 6 shows a case where the exchange 1 refers to the conversion table of the exchange 2 and temporarily holds the result.
[0040]
Example C in FIG. 6 shows a case where the exchange 1 acquires the conversion table from the exchange 2 and temporarily holds this database.
[0041]
In the above-described embodiments, the case of temporarily holding has been described as an example. However, the present invention is not limited to this case, and in other embodiments, a conversion table once referred to is permanently stored. It may be held.
[0042]
(Other embodiments)
In the above-described embodiment, the case where the subscriber-level switch 300 is used as the switch has been described as an example. However, the present invention is not limited to this case, and any switch provided with the function of the present invention can be used. It will be apparent to those skilled in the art that any switch can be implemented.
[0043]
In the above-described embodiment, the case where each embodiment is realized independently has been described as an example. However, the present invention is not limited to this case, and in other embodiments, each embodiment is described. Those skilled in the art will appreciate that these can be implemented in appropriate combinations.
[0044]
Moreover, the storage content of the conversion table shown in the embodiment is only an example, and another storage unit or the like may be stored in the conversion table. Further, as described above, an example of the conversion table is shown and each embodiment has been described. However, the present invention is not limited to such an embodiment, and any other conversion table may be used. In the above-described embodiment, the case where the conversion table is configured alone has been described as an example. However, the present invention is not limited to this case, and the conversion table described above requires a plurality of tables. It will be apparent to those skilled in the art that the present invention can be implemented in any case of appropriate combination.
[0045]
In the above-described embodiment, the mobile phone network has been described by taking the PDC method of NTT DoCoMo, Inc. (company name) as an example, but the present invention is not limited to this case. In other embodiments, the present invention may be applied to a mobile phone network / mobile packet network or the like having a different wireless system.
[0046]
Further, in the above-described embodiment, the NTT DOCOMO, Inc. (company name) service, system method, and the like have been described as an example. However, the present invention is not limited to this case. In this embodiment, the present invention may be applied to other companies' services, system systems, and the like having similar functions.
[0047]
Furthermore, various modifications other than those described above are possible. However, as long as the modification is based on the technical idea described in the claims, the modification is within the technical scope of the present invention.
[0048]
【The invention's effect】
As described in detail above, according to the present invention, all exchanges can use all conversion tables as long as each exchange has a number conversion table for its subordinate area. Appropriate number conversion corresponding to the location location can be performed even for outgoing calls when the subscriber line is extended.
[Brief description of the drawings]
FIG. 1 is a diagram showing an example of a system configuration of a conventional mobile communication system.
FIG. 2 is a diagram showing an example at the time of handover in a conventional mobile communication system.
FIG. 3 is a diagram showing an example of a system configuration of a mobile communication system to which the present invention is applied.
FIG. 4 is a diagram showing an example of a communication sequence when a radio network controller manages the latest position information in a mobile communication system to which the present invention is applied.
FIG. 5 is a diagram showing an example of a communication sequence when an exchange manages the latest position information in a mobile communication system to which the present invention is applied.
FIG. 6 is a diagram showing an example of a representative station inquiry procedure in the mobile communication system of the present invention.
[Explanation of symbols]
100 mobile device 200 radio control station 201 radio control station 1
202 Radio control station 2
203 Radio control station 3
204 Radio control station 4
300 Subscriber floor switch 301 Subscriber floor switch 1
302 Subscriber floor switch 2
400 Gateway exchange 500 Center 501 corresponding to position number Center 502 corresponding to position number 1 Center 503 corresponding to position number 2 Center corresponding to position number 3

Claims (6)

A conversion table for converting a dial number of the call into a connection destination number corresponding to the area for a call originated from a terminal located in the coverage area of the first radio control station, and controlling and joining the call A first exchange having means for extending a person line;
A conversion table for converting a dial number of the call into a connection destination number corresponding to the area for a call originated from a terminal located in the coverage area of the second radio control station; And a second exchange having means for extending the subscriber line,
The first exchange is
Receiving a dial number of a second call originated from a terminal located in a coverage area of the second radio control station having a first call extended by a subscriber line by the first switch; Means,
Means for obtaining a position number indicating the position of the terminal and an identifier for identifying the second exchange;
Means for transmitting the dial number and the location number to the second exchange identified by the identifier;
The second exchange includes a means for searching a connection destination number corresponding to the received dial number and the location number from the conversion table, and transmitting the connection destination number to the first exchange;
The mobile communication system, wherein the first exchange includes means for connecting to the received connection destination number corresponding to the dial number of the second call. The mobile communication system according to claim 1, wherein
The mobile communication system, wherein the first exchange further comprises means for recording the connection destination number. The mobile communication system according to claim 1, wherein
The second exchange further comprises means for transmitting the conversion table including the connection number corresponding to the received dial number and the location number to the first exchange,
The mobile communication system, wherein the first exchange further comprises means for recording the received conversion table. A conversion table for converting a dial number of the call into a connection destination number corresponding to the area for a call originated from a terminal located in the coverage area of the first radio control station, and controlling and joining the call A first exchange having means for extending a person line;
A conversion table for converting a dial number of the call into a connection destination number corresponding to the area for a call originated from a terminal located in the coverage area of the second radio control station; A number conversion method for a mobile communication system, comprising: a second exchange having means for extending a subscriber line;
In the first exchange,
Receiving a dial number of a second call originated from a terminal located in a coverage area of the second radio control station having a first call extended by a subscriber line by the first switch; Steps,
Obtaining a position number indicating the position of the terminal and an identifier for identifying the second exchange;
Transmitting the dial number and the location number to the second switch identified by the identifier;
In the second exchange,
Retrieving a connection destination number corresponding to the received dial number and the location number from the conversion table, and transmitting the connection destination number to the first exchange;
In the first exchange,
A number conversion method for a mobile communication system, comprising a step of connecting to the received connection destination number in correspondence with the dial number of the second call. In the number conversion method of the mobile communication system of Claim 4,
The number conversion method for a mobile communication system, further comprising the step of recording the connection destination number in the first exchange. In the number conversion method of the mobile communication system of Claim 4,
Transmitting the conversion table including the connection number corresponding to the received dial number and the location number to the first switch in the second switch;
The first switching system further comprises a step of recording the received conversion table.

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