JP4823096B2 - Wireless terminal calling method of mobile communication system, gateway device, and mobile communication system - Google Patents

Description

  The present invention relates to a method of calling a wireless terminal in a mobile communication system and a gateway device used in this type of system.

As is well known, in an existing mobile communication system, when an incoming call arrives at a mobile radio terminal, a simultaneous call (simultaneous incoming call) is made to all base stations in the call area where the radio terminal has registered its location. Also in the wireless section, the wireless terminal is called by simultaneous notification, and the line is connected according to the response of the wireless terminal (see, for example, Patent Documents 1 to 4).
JP 2003-259212 A JP 2001-309419 A JP-A-7-162932 JP-A-6-327048

As described above, in the wireless terminal calling method, the gateway device, and the mobile communication system of the existing mobile communication system, all base stations in the calling area are called all at once. For this reason, when a wireless terminal is used in a fixed place (Wireless Local Loop: WLL), or a wireless terminal is used semi-fixed (the wireless terminal moves, but is fixed when used) In some cases, inconvenience occurs when a wireless mesh network or the like is created under the base station. In other words, even when a mobile radio terminal is used in a fixed manner, a simultaneous call is made, so that line resources and radio resources for the base station are used in the call area, and valuable communication resources are wasted. . Furthermore, communication is not possible due to pressure on the channel for terminating incoming calls, resulting in a problem of call loss.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a wireless terminal calling method, a gateway device, and mobile communication in a mobile communication system that can realize efficient communication without wasteful consumption of line resources and wireless resources. To provide a system.

  In order to achieve the above object, according to one aspect of the present invention, a plurality of base stations forming a calling area of a wireless terminal, and these base stations are accommodated via a subscriber network, and a circuit switched network and an IP ( A method of calling the wireless terminal in a mobile communication system comprising a gateway device connected to an Internet Protocol) network, wherein the gateway device receives a location registration request from the wireless terminal, and the wireless device Fixed information storage unit that stores the usage status of the terminal separately for fixed use or otherwise, and individual call or simultaneous call area call based on the stored contents of the fixed information storage unit when receiving an incoming call to the wireless terminal A call method determination unit for determining whether or not the wireless terminal determined to be the individual call is registered with the location of the wireless terminal. An individual calling unit that is individually called from above, and when a call is received to a wireless terminal whose use state is fixed use, the call is individually called from the line on which the position registration of the wireless terminal is performed A wireless terminal calling method of a communication system is provided.

  By taking such measures, when a wireless terminal is used in a fixed place, or when it is used in a semi-fixed manner that moves but is fixed at the time of use, a wireless mesh network or the like is further subordinate to the base station. When a wireless terminal is used in a fixed manner as in the case of creation, a specific base station is called individually. In other words, instead of making a general call to the call area where the location is registered, if it is determined that an individual incoming call to the wireless terminal is possible, an individual call is performed, so the call to the base station is minimized. be able to. Therefore, the line resource and the radio resource can be effectively used, and the call loss can be prevented.

  According to the present invention, it is possible to provide a radio terminal calling method, a gateway device, and a mobile communication system of a mobile communication system that can realize efficient communication without wasteful consumption of line resources and radio resources.

  FIG. 1 is a system diagram showing an embodiment of a mobile communication system according to the present invention. This system is formed with the gateway devices 10, 20, and 30 as the core. The gateway devices 10, 20, and 30 are all connected to the circuit switching network XN and the IP network DN. Base stations CS1 and CSn are connected to the gateway device 10. Base stations CS4 and CSm are connected to gateway apparatus 20, and base stations CS2 and CS3 are connected to gateway apparatus 30. Each wireless terminal PS (PS1 to PS4) is connected to the base station CS via a wireless protocol, and is connected to a communication partner through a line between gateway devices. The IP network DN is a packet communication network such as a wide area Ethernet (registered trademark) or an IP-VPN connection service, and is formed as an NCC original network or the like.

  Each gateway device 10, 20, and 30 distributes signals (digital signals such as voice data, video, and image data) transmitted from the connected base station CS to either the circuit-switched network XN or the IP network DN and transmits them. . Further, the gateway devices 10, 20, and 30 send signals addressed to the radio terminals from the circuit switching network XN and the IP network DN to the base station CS and cause the terminals to receive the signals. Thereby, it is possible to arbitrarily set a bidirectional communication path with terminals belonging to the circuit switching network XN and the IP network DN. Further, a management server 40 that functions as a center device for operation of this system is connected to the circuit switching network XN and the IP network DN. The management server 40 authenticates wireless terminals and manages location registration information.

FIG. 2 is a functional block diagram showing an embodiment of the gateway device 10 and the management server 40 of FIG. The gateway devices 20 and 30 have the same configuration. In FIG. 2, the management server 40 includes a terminal information management unit 41 as a database for managing information on the wireless terminal PS. The terminal information management unit 41 manages information unique to each wireless terminal PS, and the management information includes location registration information indicating the location of the wireless terminal PS.
The gateway device includes a location registration unit 11, a fixed information storage unit 12, a calling method determination unit 13, an individual calling unit 14, and a simultaneous calling unit 15. The location registration unit 11 receives a location registration request from the wireless terminal PS, registers the unique information of the wireless terminal PS in the fixed information storage unit 12, and notifies the management server 40 of it. In the fixed information storage unit 12, the usage states of the wireless terminals PS are individually stored separately for fixed usage or otherwise.

  The call method determination unit 13 determines whether to perform a general call or an individual call when an incoming call arrives at a wireless terminal. The individual call unit 14 individually calls the destination wireless terminal PS when the call method determination unit 13 determines that the call is an individual call. The general calling unit 15 calls the calling area all at once when the calling method determination unit 13 determines that the calling is simultaneous.

FIG. 3 is a diagram illustrating a configuration example of the location registration request message. FIG. 3A shows a location registration message from the radio terminal PS, which includes individual call information in addition to the conventional location registration information. FIG. 3B is a location registration message from the gateway device 10 to the management server 40, and further includes line information / group information.
FIG. 4 is a diagram showing a configuration example of the individual call information database. This database is managed by the management server 40, and associates the line information / group information shown in FIG. 3B with each telephone number of the wireless terminal PS and registers them over the calling area.

  FIG. 5 is a schematic diagram showing the operation at the time of location registration in one embodiment of the present invention. In the existing technology, the wireless terminal PS performs location registration in order to receive an incoming call within the area. The location registration information is received and processed by the gateway device 10 via the base station CS, and then the location registration information is registered in the management server 40. The management server 40 stores the calling area as a place where the wireless terminal PS exists. Thereafter, when an incoming call arrives at the wireless terminal PS, an inquiry is made from the originating side to the management server 40 to acquire information on the wireless terminal PS, and a general call is made to the corresponding area.

  In this embodiment, the wireless terminal PS that is assumed to be used in a fixed manner in FIG. 5 adds location information to the location registration request and adds individual incoming call information indicating that it is fixed to the area and used. Do. The base station CS transfers this to the gateway device 10 as it is. Upon receiving the location registration request, the gateway device 10 determines the added individual incoming information, and in the case of fixed use, the telephone number of the wireless terminal PS and the line for which the location registration request is made in the individual call information database of FIG. After registering the information as an individual call target in association with the call area, the location registration is transmitted to the management server 40.

  That is, the gateway device 10 registers the registration number and the line information in the individual call information database if the individual incoming call information is set in the location registration request message. At that time, the telephone number and line information or group information are registered in the corresponding call area of FIG. The management server 40 registers the location registration information as in the conventional case.

  FIG. 6 is a flowchart showing a processing procedure when an incoming call is received in the present embodiment. In FIG. 6, the gateway device 10 (step S61) that has received an incoming call acquires information of the corresponding calling area from the individual call information database (FIG. 4) (step S62), and individually calls based on the destination telephone number. Is registered (step S63). If the individual call registration has been made, the gateway device 10 acquires the destination line (step S64), and performs the individual call by making an incoming call only to the line (step S65). If the call is not registered, a simultaneous call is performed by making an incoming call to all lines belonging to the call area (step S66).

  FIG. 7 is a schematic diagram showing another example of the location registration procedure in this embodiment. In this procedure, it is assumed that determination of individual incoming calls is not information in the location registration request from the wireless terminal PS but all location registration requests requested from the line of the gateway device 10 (20, 30) are handled as fixed use. To.

  (1) First, when a location registration request from the wireless terminal PS1 is received via the base station CS1, (2) the gateway device 10 determines whether or not this line is a line registered as a specific line. Since the line of CS1 is registered as a specific line, the gateway device 10 registers the telephone number and line information in the individual call information database in (1) 'and (2), and transmits a location registration request to the management server 40. That is, when the location registration request message is input from the CS1 line in (2), the telephone number and the line information are registered in the individual call information database. Since the location registration request message from CS2 is not a specific line, there is no registration in the individual call information database. (3) The management server performs the location registration process as usual. When a location registration request from the wireless terminal PS1 is received via the base station CS2, this line is not a specific line, so registration in the individual call information database is not performed.

  FIG. 8 is a schematic diagram showing another example of the location registration procedure in this embodiment. In this procedure, the management server 40 determines whether it is an individual calling radio terminal. When a location registration request from the radio terminal PS1 is received via the radio base station CS1 in (1) and (2), (3) the gateway device 10 transmits the location registration request to the management server 40. After performing (4) location registration information registration (conventional processing), the management server 40 determines whether or not PS1 is a fixed use wireless terminal in (5), adds individual call information according to the determination, and sends a location registration response. Return it. The gateway device 10 registers the telephone number and the line information in the individual call information database if the individual call information is added to the location registration response in (6).

  FIG. 9 is a schematic diagram showing another example of the location registration procedure in this embodiment. In this procedure, the use state (whether it is a fixed use radio terminal) is determined for each struggling terminal using data held in the gateway device 10. It is assumed that a location registration request from the wireless terminal PS1 is received via the wireless base station CS1 in (1). Then, when the gateway device 10 matches the wireless terminal list held internally in (2) and the wireless terminal information in the location registration request message, the gateway device 10 registers the telephone number and the line information in the individual call information database and manages them. A location registration request is transmitted to the server 40. (3) The management server 40 performs the location registration process as usual.

  FIG. 10 is a schematic diagram showing another example of an incoming call in the present embodiment. In FIG. 10, (1) the gateway device 10 that has received an incoming call from the network (IP network DN or circuit switching network XN) refers to the individual call information database to determine whether or not the destination wireless terminal is in fixed use. . (2) For fixed use (in the case of individual call), an individual call is made, so that only a designated line (radio base station) is called according to the line information. In this embodiment, only the CS1 is called. (3) When the usage is not fixed (in the case of simultaneous calling), a call is made to all the lines (radio base stations CS) in the calling area as normal processing.

  FIG. 11 is a functional block diagram illustrating another example of the gateway devices 10 to 30 and the management server 40 of FIG. In FIG. 11, the management server 40, in addition to a terminal information management unit 41 that manages information on wireless terminals, a location registration management unit 42 that manages the usage state of each wireless terminal PS separately for fixed use or otherwise. Is provided. The location registration management unit 42 also manages location registration information indicating where the wireless terminal PS is and from which line of which gateway device the location registration has been performed. That is, in FIG. 11, the management server 40 is provided with a location management function for each wireless terminal PS.

  FIG. 12 is a schematic diagram showing a procedure at the time of an incoming call to the wireless terminal PS in FIG. In FIG. 12, (1) the gateway device 10 that receives an incoming call from the network inquires the management server 40 about the call type (individual call or simultaneous call) of the destination mobile terminal. (2) The management server 40 determines whether or not the usage is fixed based on the data held therein and returns a response. At this time, if it is fixed use, the individual call information and the line information are included in the response message. (3) The gateway device 10 that has received the response determines whether or not the individual call is made based on the added information, and if it is an individual call, calls the designated line (wireless base station) only according to the line information (individual call) ). In this embodiment, only the CS1 is called. If it is not fixed use, a call is made to all the lines (radio base stations) in the call area as a normal process.

  As described above, in this embodiment, in a mobile communication system in which gateway devices accommodating a plurality of base stations CS are connected to each other via a circuit switched network XN and an IP network DN, the usage state of the radio terminal PS is fixed. It is managed separately for use or mobile use, and a specific base station is called individually when calling to the radio terminal PS for fixed use. That is, the individual call to the radio terminal PS is performed instead of the simultaneous call to the call area where the location registration is performed. As a result, it is possible to minimize calls to the base station CS, eliminate wasteful consumption of line resources and radio resources, and realize efficient communication, a wireless terminal calling method of a mobile communication system, a gateway device, and a mobile communication system Can be provided.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment.

1 is a system diagram showing an embodiment of a mobile communication system according to the present invention. The functional block diagram which shows embodiment of the gateway apparatuses 10-30 and the management server 40 of FIG. The figure which shows the structural example of a location registration request message. The figure which shows the structural example of an individual call information database. The schematic diagram which shows the operation | movement at the time of the position registration in one Embodiment of this invention. The flowchart which shows the process sequence at the time of the incoming call in one Embodiment of this invention. The schematic diagram which shows the other example of the position registration procedure in one Embodiment of this invention. The schematic diagram which shows the other example of the position registration procedure in one Embodiment of this invention. The schematic diagram which shows the other example of the position registration procedure in one Embodiment of this invention. The schematic diagram which shows the other example at the time of the incoming call in one Embodiment of this invention. The functional block diagram which shows the other example of the gateway apparatuses 10-30 and the management server 40 of FIG. FIG. 12 is a schematic diagram illustrating a procedure when an incoming call is made to the wireless terminal PS in FIG. 11.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10, 20, 30 ... Gateway apparatus, XN ... Circuit switching network, DN ... IP network, CS (CS1, CS2, CS3, CS4, CSm, CSn) ... Base station, PS (PS1-PS4) ... Wireless terminal, 11 ... Location registration unit, 12 ... Fixed information storage unit, 13 ... Calling method determination unit, 14 ... Individual call unit, 15 ... Simultaneous call unit, 40 ... Management server, 41 ... Terminal information management unit, 42 ... Location registration management unit

Claims (31)

Mobile communication comprising a plurality of base stations forming a calling area of a wireless terminal, and a gateway apparatus that accommodates these base stations via a subscriber network and is connected to a circuit switching network and an IP (Internet Protocol) network A method for calling the wireless terminal in a system, comprising:
The gateway device is
A location registration unit that accepts a location registration request from the wireless terminal;
A fixed information storage unit for storing the use state of the wireless terminal separately for fixed use or otherwise; and
A call method determination unit that determines whether an individual call or a general call area is called based on the content stored in the fixed information storage unit when an incoming call is made to the wireless terminal;
An individual call unit that individually calls the wireless terminal determined to be the individual call from the line on which the location registration of the wireless terminal has been performed,
A method for calling a radio terminal of a mobile communication system, wherein when a call is received to a radio terminal whose usage status is fixed use, the call is individually made from a line on which the location registration of the radio terminal is performed. The said location registration part distinguishes the utilization state of the said radio | wireless terminal according to the separate call information added to the location registration request from a radio | wireless terminal, and memorize | stores it in the said fixed information storage part. For calling a wireless terminal of a mobile communication system. The said location registration part memorize | stores in the said fixed information memory | storage part as a fixed use the utilization state of the radio | wireless terminal which performed the location registration via the line designated beforehand as a specific line. For calling a wireless terminal of a mobile communication system. The mobile communication system comprises a management server accessible from the gateway device,
The management server includes a wireless terminal information management unit that manages location registration information of the wireless terminal,
The location registration unit transmits a location registration request from a wireless terminal to the management server,
The management server determines the use state of the wireless terminal based on information of the wireless terminal information management unit, adds individual call information to the location registration response of the wireless terminal corresponding to fixed use,
2. The wireless terminal call of the mobile communication system according to claim 1, wherein the location registration unit stores a use state of the wireless terminal in the fixed information storage unit depending on presence / absence of individual call information in the location registration response. Method. The location registration unit collates the wireless terminal information with a wireless terminal database held in the own device when receiving a location registration request from the wireless terminal, and if there is a registration in the wireless terminal database, the usage state of the wireless terminal The wireless terminal calling method for a mobile communication system according to claim 1, wherein the fixed information storage unit stores the fixed information as fixed use. The call method determination unit obtains the use state of the destination wireless terminal from the fixed information storage unit when an incoming call is received from the circuit switching network or the IP network, and determines whether to call an individual call or a general call area based on the information. Judgment,
The wireless terminal call of the mobile communication system according to claim 1, wherein if the use state of the destination wireless terminal is fixed use, the call is individually made from a line stored in the fixed information storage unit. Method. In the gateway device, in addition to the call area information, set adjacent radio base station information,
6. The location registration unit, when registering fixed usage information in the fixed information storage unit, stores together line group information that accommodates adjacent radio base stations. A wireless terminal calling method for a mobile communication system according to claim 1. The call method determination unit obtains the use state of the destination wireless terminal from the fixed information storage unit when an incoming call is received from the circuit switching network or the IP network, and determines whether to call an individual call or a general call area based on the information. Judgment,
The method for calling a radio terminal of a mobile communication system according to claim 6, wherein if the usage state of the destination radio terminal is fixed use, the group line stored in the fixed information storage unit is called. A plurality of base stations forming a calling area of a wireless terminal, a gateway device accommodating these base stations via a subscriber network and connected to a circuit switching network and an IP (Internet Protocol) network, and the gateway device A method of calling the wireless terminal in a mobile communication system comprising an accessible management server,
The gateway device is
A call method determination unit that determines whether an individual call or a general call area is called when an incoming call is received to the wireless terminal;
An individual call unit that individually calls the wireless terminal determined to be the individual call from the line on which the location registration of the wireless terminal has been performed,
The management server
A wireless terminal information management unit for managing location registration information of the wireless terminal;
A location registration management unit that stores a call area, gateway device information, and line information at the time of location registration, and associates the use state of each radio terminal with the wireless terminal information management unit separately for fixed use or otherwise, Prepared,
The call method determination unit inquires of the management server about the use state of the wireless terminal when an incoming call is made to the wireless terminal,
The management server determines the usage state of the wireless terminal that has received the inquiry, and in the case of fixed use, returns the individual call information and line information to the call method determination unit,
The gateway device individually calls a destination wireless terminal from the line on which the location registration of the wireless terminal has been performed based on the individual call information and the line information returned from the management server. A wireless terminal calling method for a mobile communication system. The location registration management unit determines a use state of the wireless terminal when the location registration request is received from the wireless terminal and holds it as internal data, and immediately returns a response from the internal data when inquiring from the gateway device. The radio terminal calling method for a mobile communication system according to claim 9, wherein: The gateway device includes a wireless terminal information storage unit that stores wireless terminal information for each line,
The call method determination unit determines whether or not the destination wireless terminal is registered in the information for each line in the wireless terminal information storage unit when an incoming call is received from the circuit switching network or the IP network. 10. The method for calling a radio terminal of a mobile communication system according to claim 9, wherein the radio terminal is individually called from the line on which the location registration of the radio terminal is performed. The location registration management unit determines whether or not there is individual call information in the location registration request when receiving a location registration request from a wireless terminal, holds the internal call data, and immediately responds from the internal data when inquiring from the gateway device 10. The method for calling a wireless terminal of a mobile communication system according to claim 9, wherein: In a gateway apparatus that accommodates a plurality of base stations forming a calling area of a wireless terminal via a subscriber network and is connected to a circuit switching network and an IP (Internet Protocol) network,
A location registration unit that accepts a location registration request from the wireless terminal;
A fixed information storage unit for storing the use state of the wireless terminal separately for fixed use or otherwise; and
A call method determination unit that determines whether an individual call or a general call area is called based on the content stored in the fixed information storage unit when an incoming call is made to the wireless terminal;
An individual call unit that individually calls the wireless terminal determined to be the individual call from the line on which the location registration of the wireless terminal has been performed,
A gateway device, wherein when a call is received to a wireless terminal whose use state is fixed use, the gateway device is called individually from a line on which the location of the wireless terminal is registered. The said location registration part distinguishes the utilization condition of the said radio | wireless terminal according to the individual call information added to the location registration request from a radio | wireless terminal, and memorize | stores it in the said fixed information storage part. Gateway device. The said location registration part memorize | stores in the said fixed information storage part as a fixed utilization the utilization state of the radio | wireless terminal which performed the location registration via the line designated beforehand as a specific line. Gateway device. The location registration unit collates the wireless terminal information with a wireless terminal database held in the own device when receiving a location registration request from the wireless terminal, and if there is a registration in the wireless terminal database, the usage state of the wireless terminal The gateway apparatus according to claim 13, wherein the fixed information storage unit stores the fixed information as fixed use. The call method determination unit obtains the use state of the destination wireless terminal from the fixed information storage unit when an incoming call is received from the circuit switching network or the IP network, and determines whether to call an individual call or a general call area based on the information. Judgment,
14. The gateway device according to claim 13, wherein if the usage state of the destination wireless terminal is fixed usage, the gateway device is called individually from the line stored in the fixed information storage unit. Set neighboring radio base station information in addition to the calling area information,
18. The location registration unit, when registering fixed usage information in the fixed information storage unit, stores together line group information that accommodates adjacent radio base stations. The gateway device according to claim 1. The call method determination unit obtains the use state of the destination wireless terminal from the fixed information storage unit when an incoming call is received from the circuit switching network or the IP network, and determines whether to call an individual call or a general call area based on the information. Judgment,
18. The gateway device according to claim 17, wherein if the use state of the destination wireless terminal is fixed use, the group line stored in the fixed information storage unit is called. Mobile communication comprising a plurality of base stations forming a calling area of a wireless terminal, and a gateway apparatus that accommodates these base stations via a subscriber network and is connected to a circuit switching network and an IP (Internet Protocol) network In the system,
The gateway device is
A location registration unit that accepts a location registration request from the wireless terminal;
A fixed information storage unit for storing the use state of the wireless terminal separately for fixed use or otherwise; and
A call method determination unit that determines whether an individual call or a general call area is called based on the content stored in the fixed information storage unit when an incoming call is made to the wireless terminal;
An individual call unit that individually calls the wireless terminal determined to be the individual call from the line on which the location registration of the wireless terminal has been performed,
A mobile communication system, wherein when a call is received by a wireless terminal whose use state is fixed use, the mobile communication system is individually called from a line on which the location of the wireless terminal is registered. The location registration unit distinguishes and stores the use state of the wireless terminal in the fixed information storage unit according to individual call information added to a location registration request from a wireless terminal. Mobile communication system. 21. The location registration unit stores, in the fixed information storage unit, a usage state of a wireless terminal that has performed location registration via a line designated in advance as a specific channel as fixed usage. Mobile communication system. The mobile communication system comprises a management server accessible from the gateway device,
The management server includes a wireless terminal information management unit that manages location registration information of the wireless terminal,
The location registration unit transmits a location registration request from a wireless terminal to the management server,
The management server determines the use state of the wireless terminal based on information of the wireless terminal information management unit, adds individual call information to the location registration response of the wireless terminal corresponding to fixed use,
The mobile communication system according to claim 20, wherein the location registration unit stores a use state of the wireless terminal in the fixed information storage unit depending on presence / absence of individual call information in the location registration response. The location registration unit collates the wireless terminal information with a wireless terminal database held in the own device when receiving a location registration request from the wireless terminal, and if there is a registration in the wireless terminal database, the usage state of the wireless terminal The mobile communication system according to claim 20, wherein the fixed information storage unit stores the fixed information as fixed use. The call method determination unit obtains the use state of the destination wireless terminal from the fixed information storage unit when an incoming call is received from the circuit switching network or the IP network, and determines whether to call an individual call or a general call area based on the information. Judgment,
21. The mobile communication system according to claim 20, wherein if the use state of the destination wireless terminal is fixed use, the call is individually called from a line stored in the fixed information storage unit. In the gateway device, in addition to the call area information, set adjacent radio base station information,
25. The location registration unit, when registering fixed usage information in the fixed information storage unit, stores together line group information that accommodates adjacent radio base stations. The mobile communication system according to claim 1. The call method determination unit obtains the use state of the destination wireless terminal from the fixed information storage unit when an incoming call is received from the circuit switching network or the IP network, and determines whether to call an individual call or a general call area based on the information. Judgment,
26. The mobile communication system according to claim 25, wherein a group line stored in the fixed information storage unit is called if the use state of the destination wireless terminal is fixed use. A plurality of base stations forming a calling area of a wireless terminal, a gateway device accommodating these base stations via a subscriber network and connected to a circuit switching network and an IP (Internet Protocol) network, and the gateway device A method of calling the wireless terminal in a mobile communication system comprising an accessible management server,
The gateway device is
A call method determination unit that determines whether an individual call or a general call area is called when an incoming call is received to the wireless terminal;
An individual call unit that individually calls the wireless terminal determined to be the individual call from the line on which the location registration of the wireless terminal has been performed,
The management server
A wireless terminal information management unit for managing location registration information of the wireless terminal;
A location registration management unit that stores a call area, gateway device information, and line information at the time of location registration, and associates the use state of each radio terminal with the wireless terminal information management unit separately for fixed use or otherwise, Prepared,
The call method determination unit inquires of the management server about the use state of the wireless terminal when an incoming call is made to the wireless terminal,
The management server determines the usage state of the wireless terminal that has received the inquiry, and in the case of fixed use, returns the individual call information and line information to the call method determination unit,
The gateway device individually calls a destination wireless terminal from the line on which the location registration of the wireless terminal has been performed based on the individual call information and the line information returned from the management server. Mobile communication system. The location registration management unit determines a use state of the wireless terminal when the location registration request is received from the wireless terminal and holds it as internal data, and immediately returns a response from the internal data when inquiring from the gateway device. The mobile communication system according to claim 28, characterized in that: The gateway device includes a wireless terminal information storage unit that stores wireless terminal information for each line,
The call method determination unit determines whether or not the destination wireless terminal is registered in the information for each line in the wireless terminal information storage unit when an incoming call is received from the circuit switching network or the IP network. 29. The mobile communication system according to claim 28, wherein the mobile communication system is individually called from the line on which the location registration of the wireless terminal is performed. The location registration management unit determines whether or not there is individual call information in the location registration request when receiving a location registration request from a wireless terminal, holds the internal call data, and immediately responds from the internal data when inquiring from the gateway device 29. The mobile communication system according to claim 28, wherein:

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