JP4637191B2 - Mobile switch, mobile station, mobile communication system, and location registration expansion method - Google Patents

Description

  The present invention relates to registration of a location where a mobile device is located in a mobile communication network, and in particular, performs appropriate location registration corresponding to the mobile device's movement state and communication state, and can efficiently use radio resources. The present invention relates to a mobile exchange, a mobile device, a mobile communication system, and a location registration expansion method.

  A mobile communication system is provided in a mobile station (UE), a base station controller (RNC), a base station (BS), a mobile switch (MSC), and a mobile switch, and registers location information of the mobile station. And a location register (VLR). In such a mobile communication system, the location of the mobile device is not fixed but always moves. For this reason, management of registering the location of the mobile device in advance is necessary on the network (mobile exchange) side so that the communication can be established at the time of incoming to the mobile device.

  Specifically, the location of the mobile station is managed by a regional division called a location registration area as part of the subscriber information in a location register provided in the mobile exchange. The same location registration area information as that of the location register is also recorded on the mobile device side. The location registration procedure of the mobile device is requested and executed from the mobile device side to the network when the mobile device is turned on, and thereafter when the mobile device that is not communicating moves across the location registration area. The

  By the way, in recent years, the number of users using mobile communication systems has increased, and the amount of data on the network has also increased. Here, since radio resources between the mobile station and the base station on the network side are limited, various methods for efficiently using the radio resources are being studied.

  As a conventional location registration method, for example, when a mobile device moves across a location registration area, there is a configuration in which location registration is always performed when the location registration area is crossed. The network always recognizes the area where the mobile device is located in order to determine the area for sending a paging signal for incoming calls to the mobile device.

  FIG. 12 is a sequence diagram for explaining an example of a conventional location registration procedure for a mobile device. The location registration procedure will be described in sequence with reference to FIG. Assume that there are three location registration areas LA1, LA2, and LA3.

  First, (1) the mobile device 100 exists in the location registration area LA1 of the base station (BS1) 101, and the location registration area LA1 is transmitted via the base station 101 and the base station controller (RNC1) 111. Suppose that it is registered in the location register VLR in the mobile switching center (MSC) 104 (step S1200).

  Next, it is assumed that (2) the mobile device 100 has moved to a new location registration area LA2 (step S1201). At this time, the mobile device 100 recognizes that it has entered the new location registration area LA2 based on the notification information D1 of the located area (step S1202). Then, a location information registration request D2 in which the old location registration area LA1 is set is transmitted to the location register VLR of the mobile switch 104 via the base station (BS2) 102 and the base station controller (RNC2) 112.

  Next, (3) the mobile switch 104 that has received the location information registration request D2 from the mobile device 100 recognizes from the received signal that the corresponding mobile device 100 is located in the location registration area LA2, and the location register The final location registration area of the VLR is changed to LA2 (step S1203). After that, the mobile exchange 104 returns a location information registration request response D3 to the mobile device 100 to notify that the final location registration area is LA2.

  Next, (4) the mobile device 100 that has received the location information registration request response D3 recognizes that the location registration has been completed, and writes LA2 as the final location registration area in the location information storage area in the mobile device 100. Store (step S1204).

  Next, it is assumed that (5) the mobile device 100 has moved to the location registration area LA3 (step S1205). At this time, the mobile device 100 recognizes that a new location registration area has entered LA3 based on the notification information D4 of the area where it is located (step S1206). Then, the same location registration procedure as when moving to the location registration area LA2 is performed. First, a location information registration request D5 in which the old location registration area LA2 is set is transmitted to the location register VLR of the mobile switch 104 via the base station (BS3) 103 and the base station controller (RNC3) 113.

  Next, (6) the mobile switch 104 that has received the location information registration request D5 from the mobile device 100 recognizes from the received signal that the corresponding mobile device 100 is located in the location registration area LA3, and the location register The final location registration area of the VLR is changed to LA3 (step S1207). Thereafter, the mobile exchange 104 returns a location information registration request response D6 to the mobile device 100 to notify that the final location registration area is LA3.

  Next, (7) the mobile device 100 that has received the location information registration request response D6 recognizes that the location registration has been completed, and writes LA3 as the final location registration area in the location information storage area in the mobile device 100. Store (step S1208).

  As described above, when the mobile device 100 that has been in the location registration area LA1 moves to the location registration area LA2, the mobile device 100 performs the location registration procedure for the network, and the mobile device 100 and the mobile switch 104 The location information in the location register VLR is updated to the location registration area LA2. As a result, when an incoming call arrives at the corresponding mobile device 100, the network recognizes that the mobile device 100 is located in the location registration area LA2, and calls the relevant location registration area LA2 ( (Paging) procedure. Similarly, when the mobile device 100 moves to a new location registration area LA3, the location information is updated to the location registration area LA3.

  Thus, in the conventional mobile communication, the network grasps the position of the mobile device in units of location registration areas composed of a plurality of base stations. When receiving a call from the network to the mobile device, updating the location registration area is important in order to accurately grasp the location registration area. As technologies related to the update of the location registration area of the mobile device, there are technologies disclosed in Patent Documents 1 to 3 below.

Japanese Patent Laid-Open No. 7-87554 JP-A-7-250365 JP 2000-23234 A

  However, according to the prior art, every time the user moves across the location registration area, the location registration information is uniformly set to determine the incoming paging area for the network regardless of the frequency of the incoming call. Processing related to the update was performed. For this reason, when the mobile device frequently moves in the vicinity of the boundary of the position registration area, the position registration information update process described above is performed every time one of the position registration areas is entered. In particular, when a mobile device with low incoming frequency frequently updates location registration information, it means that network radio resources are wasted and network radio resources cannot be used efficiently. It was.

  The present invention has been made in view of the above-described problems, and can appropriately manage the mobile device's movement state and communication state to efficiently register the location of the mobile device, thereby efficiently using the wireless resources of the network. It is an object of the present invention to provide a mobile exchange, a mobile device, a mobile communication system and a location registration expansion method that can be used.

  In order to solve the above-described problems and achieve the object, the present invention is characterized by the following. The mobile switching unit records the movement state between the incoming call recording means for recording the number of incoming calls to the mobile device for a predetermined period and the past location registration area to which the mobile device has moved each time the mobile device moves to a different location registration area. The moving recording means for recording and the number of incoming calls recorded in the incoming recording means does not exceed a predetermined incoming threshold, and the number of movements between the location registration areas within a predetermined time recorded in the moving recording means is Location registration that combines a new location registration area with the past location registration area and records it in the movement recording means when the predetermined number of thresholds is exceeded, and notifies the mobile device of the location registration area expanded by the combination Area expansion means. The mobile station transmits the location registration area storage means for recording the expanded location registration area notified from the mobile switch, and the mobile switchboard only when moving to a new location registration area not recorded in the location registration area storage means. A location registration requesting unit that requests location registration of a new location registration area and that does not require location registration for the mobile exchange for movement within the location registration area recorded in the location registration area storage unit.

According to the present invention, the mobile exchange records and manages the movement state every time the mobile station moves to a different location registration area. Only when the mobile station moves to a new location registration area that is not recorded in the location registration area storage means, it requests the mobile exchange to register the location of the new location registration area. Since this mobile station does not request location registration for the mobile exchange for movement within the expanded location registration area, it reduces the communication load on the network due to the location registration request, thereby improving the efficiency of radio resources . Can be used effectively.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic diagram showing the configuration of a mobile device and a network constituting a mobile communication system according to the present invention, and a location registration area. As shown in the figure, the network has a plurality of location registration areas LA1, LA2, LA3 corresponding to communication service areas. A mobile device (UE) 100 such as a cellular phone can make a call while moving in these location registration areas LA1, LA2, and LA3.

  The network has location registration areas LA1, LA2, and LA3, and a plurality of base stations (BS, 101) 101a, 101b, and 101c that perform communication (including telephone calls) using radio waves with each mobile device 100. A base station controller (RNC, 111) 111a, 111b, 111c connected to each base station 101, and an external relay network (and mobile devices 100 inside the network) connected to each base station controller 111. Mobile switching center (MSC) 104 that controls outgoing and incoming calls. In the mobile exchange 104, a location register (VLR) 105 for registering the location information of the mobile device 100 is provided. The location register 105 manages the location of the mobile device 100 as a part of the subscriber information by a regional division called a location registration area.

  Base station 101 has mobile device 100 under its control. The base station control device 111 has means for transmitting a notification signal to the mobile device 100 via the base station 101. The mobile device 100 has means for receiving broadcast information transmitted from the base station control device 111 via the base station 101. The broadcast information includes location registration area information to which the base station 101 that transmitted the broadcast information belongs.

  The mobile device 100 has a means for recognizing a location registration area where the mobile device 100 is located based on the location registration area information and performing a predetermined location registration in the location register 105 when moving to a different location registration area. ing. Further, the mobile device 100 has a means for recording the same position registration area information as the location register 105.

  The mobile switch 104 has means for notifying the mobile device 100 of an incoming call when an incoming call is received from another network to the mobile device 100 under its control. When an incoming signal is received from another network, the final location registration area information of the corresponding mobile device 100 stored in the location register 105 is searched, and the base station controller 111 and the base station 101 corresponding to the entire location registration area are retrieved. The incoming call is notified by paging, and the mobile device 100 is activated to process the incoming call.

  FIG. 2 is a block diagram showing an internal configuration of a mobile device (UE). The mobile device 100 includes an antenna 201, a reception unit 202, a transmission unit 203, a signal analysis unit 204, a location registration area storage unit 205, a location registration request unit 206, and a paging response unit 207. . The mobile device 100 has a function of holding the position registration area in an expanded state.

  FIG. 3 is a block diagram showing the internal configuration of the mobile switching center (MSC). The mobile switch 104 performs incoming calls to the mobile device 100 and outgoing calls from the mobile device 100 with an external relay network, and a base station corresponding to a location registration area where the mobile device 100 is located at the time of incoming and outgoing calls. Network control is performed on a station (BS) via a base station controller (RNC). The mobile switch 104 includes a reception unit 301, a transmission unit 302, a signal analysis unit 303, a subscriber information storage unit 304, a location registration request response unit 305, and a paging request unit 306. A part of the subscriber information storage unit 304 is used as the location register (VLR) 105, and stores information related to the location registration area. In the following description, it is assumed that the subscriber information storage unit 304 has the function of the location register 105.

  Next, a configuration related to expansion of the location registration area, which is a main component of the present invention, will be described. In the present invention, in order to reduce the number of times of location registration of the mobile device 100, for the mobile device 100 having a high movement frequency and a low incoming frequency, a plurality of location registration areas are combined and stored as final location registration area information. For example, when the mobile device 100 moves to the new location registration area LA2 in the old location registration area LA1, the combination is LA1 + LA2, which is referred to as expansion of the location registration area. Thereby, when the mobile device 100 frequently moves between specific location registration areas in a short time, the mobile device 100 does not execute the location registration process each time, and the location registration for the network is performed. The number of times is reduced to enable efficient use of network radio resources. For this reason, the mobile device 100 and the mobile switch 104 are provided with means for executing location registration area expansion and location registration expansion area cancellation described later.

  The subscriber information storage unit 304 of the mobile switch 104 has functions of a movement recording unit that records the movement state of the mobile unit 100 and an incoming call recording unit. This movement recording means records in the subscriber information storage unit 304 the information that the mobile device 100 has moved from one location registration area to another location registration area and the time at which the mobile device 100 moved. When the mobile device 100 executes the location registration process, the mobile recording means sends information added when the location information registration request from the mobile device 100 passes through the base station control device 111 (the cell that received the message). The current location registration area (for example, LA2) of the mobile device 100 can be recognized based on the correspondence information of the location registration area. In addition, since the location information registration request includes old location registration area information (for example, LA1), the mobile recording unit has moved from one location registration area to another location registration area ( For example, the movement from LA1 to LA2) can be recognized, and the information moved to the location registration area and the time moved are recorded.

  The incoming recording unit records that the mobile device 100 has received an incoming call and the time in the subscriber information storage unit 304 (location register 105). The subscriber information storage unit 304 of the mobile switch 104 recognizes that the mobile device 100 has received an incoming call when the mobile device 100 performs incoming call control (call control), and records the occurrence of the incoming call and the incoming time. .

  The signal analysis unit 303 of the mobile switch 104 has a function of location registration area expansion means. The location registration area expansion means expands the location registration area of the mobile device 100 according to the number of incoming calls to the mobile device 100 and the number of times the mobile device 100 has moved. The subscriber information storage unit 304 counts the number of incoming calls to the mobile device 100 within a predetermined time based on the information recorded by the incoming call recording means, and the number of incoming calls does not exceed a predetermined threshold. Confirm. Thereafter, the number of movements of the mobile device 100 within a predetermined time is counted based on the information recorded by the above movement recording means, and when the number of movements exceeds a predetermined threshold, the final position of the mobile device 100 As the registration area, the location registration area is expanded by combining a plurality of location registration areas according to movement. The expanded plurality of location registration areas are notified to the mobile device 100 as location registration completion areas of the mobile device 100.

  Further, the signal analysis unit 303 of the mobile switch 104 has a function of location registration extended area release means (not shown). The location registration extended area releasing means returns the plurality of location registration areas that have been combined and expanded to the original individual location registration areas. The subscriber information storage unit 304 of the mobile exchange 104 counts the number of incoming calls to the mobile device 100 within a predetermined time based on the information recorded by the incoming call recording means when the incoming call arrives at the mobile device 100. Then, when the number of incoming calls exceeds a predetermined threshold value, the location registration extended area releasing means determines to return the extended plurality of location registration areas to the original individual location registration areas. Then, an extension position registration cancellation notification is sent to the corresponding mobile device 100 when a paging request is made.

  The location registration area storage unit 205 of the mobile device 100 has a function of extended area storage means (not shown). This extended area storage means stores a plurality of location registration areas notified from the subscriber information storage unit 304 (location register 105) of the mobile switch 104 as location registration completion areas at the time of location registration. The mobile station 100 is notified of a plurality of extended location registration areas as location registration completion areas by the location registration area extension means of the mobile switching device 104 described above. This location registration completion area is written in the storage area of the location registration area storage unit 205 of the mobile device 100 as final location registration area information. Also, when an extended location registration cancellation notification is received by a paging request from the mobile switch 104, information indicating extension cancellation (for example, NULL) is written as location registration area information, and an extended location registration release response is returned to the mobile switch 104 at the time of a paging response. To do.

  Next, the contents of each signal used for location registration expansion will be described. FIG. 4 is a diagram showing signal contents related to expansion and cancellation of a location registration area transmitted / received between a mobile device and a network (mobile exchange). A location registration request signal 401 and a paging response signal 404 are transmitted from the mobile device 100 to the network. From the network to the mobile device 100, a location registration request response signal 402 and a paging request signal 403 are transmitted. In the figure, the information enclosed by the diagonal lines is the information expanded by the present invention.

  The location registration request signal 401 includes information on the old location registration area 401a and the extended old location registration area 401b. The extended old location registration area 401b is provided for transmitting a location registration area indicated by the old location registration area 401a and a list of location registration areas that currently constitute one location registration area from the mobile device 100 to the network. It is done.

  The network-side base station control device 111 is preset with information on the correspondence between the cell that received the message from the mobile device 100 and the location registration area. The location registration area 401c is added to the location registration request signal 401 received from 100 and transmitted.

  The location registration request response signal 402 includes information of a registration completion location registration area 402a and an extended registration completion location registration area 402b. The extended registration completion location registration area 402b provides the mobile device 100 with a location registration area list that constitutes a location registration area that apparently constitutes a location registration area in the registration completion location registration area 402a determined by the network. Provided to transmit.

  The paging request signal 403 includes information on the incoming user identifier 403a and the expanded position registration release notification 403b. The enlarged position registration cancellation notification 403b is provided for notifying the mobile device 100 of a notification that the network side has decided to restore all the enlarged position registration areas.

  The paging response signal 404 includes information on the incoming user identifier 404a and the expanded location registration cancellation response 404b. The enlarged location registration release response 404b receives and identifies the enlarged location registration release notification 403b set in the paging request signal 403, and notifies the network side that all the enlarged location registration areas have been restored. To be provided.

  In this way, each of the above signals, that is, the location registration request signal 401, the location registration request response signal 402, the paging request signal 403, and the paging response signal 404 all include expanded information. Such extended information of the present invention can be used in the existing location registration method without any problem even in the existing (conventional method) mobile device 100 and the network. For example, regarding the information of the extended old location registration area 401b extended in the location registration request signal 401, in the existing network in which this extended information is not considered, the extended portion is discarded and the existing old location registration area 401a is discarded. Only the information of can be interpreted. In addition, with respect to the information of the extended registration completion position registration area 402b extended in the position registration request response signal 402, the existing mobile device 100 that does not consider the extended information discards the extended portion and performs the existing registration. Only the information of the completion position registration area 402a can be interpreted.

  Also, with respect to the information of the extended location registration cancellation notification 403b extended in the paging request signal 403, the existing mobile device 100 that does not consider the extended information discards the extended portion and the existing incoming user identifier 403a. Only the information of can be interpreted. Note that the existing mobile device 100 does not assume the extension of the location registration area itself, and therefore does not perform the processing related to the extension cancellation of the location registration area. Also, with regard to the information of the expanded location registration cancellation response 404b expanded in the paging response signal 404, the existing mobile device 100 does not assume the expansion of the location registration area itself, so that a response to cancel the expansion of the location registration area is sent. Not performed. As described above, even if the present invention is applied to the existing mobile device 100 and the network, the location registration area according to the present invention is not expanded or canceled, so that the location registration by the existing method can be performed without any trouble. Yes.

  FIG. 5 is a diagram showing data relating to the location registration area stored in the subscriber information storage unit of the mobile exchange. Each time a location registration request signal 401 is transmitted from the mobile device 100, the subscriber information storage unit 304 (location register 105) stores various types of information related to the location registration area of the mobile device 100.

  The illustrated subscriber information storage unit 304 is a storage unit provided for each subscriber (user of the mobile device 100), and the information stored in the subscriber information storage unit 304 is the past of the corresponding subscriber. Location registration area transition record 501 for L time, cumulative movement count 502 for past L time, incoming record 503 for past P time, final location registration area information 504, final location registration area information expansion unit 505, and other Subscriber information 506. An arbitrary value (time) is set in advance for the L and P times. The location registration area stored in the final location registration area information 504 stores information on the registration completion location registration area 402a of the location registration request response signal 402 transmitted to the mobile device 100, and the final location registration area information expansion unit 505. Stored in the location registration area is information on the extended registration completion location registration area 402b of the location registration request response signal 402 transmitted to the mobile device 100.

  The mobile device 100 transmits a location registration request signal 401 to the mobile switch 104 when a location registration request is made. As described above, the location registration request signal 401 includes the information on the old location registration area 401a that is the past location of the mobile device 100, the information on the extended old location registration area 401b, and the current location information added by the base station controller 111. It includes information on the location registration area 401c that is the location of the mobile device 100.

  In the location registration area transition record 501 of the past L hours in the subscriber information storage unit 304, information on all location registration areas where the mobile device 100 has moved in the past L hours and the time at the time of movement are recorded. The cumulative number of movements 502 in the past L hours records the number of times the mobile device 100 has moved between specific location registration areas in the past L hours. In the incoming record 503, all the incoming times of the past P hours for the mobile device 100 are recorded (two in the illustrated example). The final location registration area information 504 stores the final location registration area of the mobile device 100. The final location registration area information expansion unit 505 stores a list of location registration areas that apparently constitute one location registration area with the location registration area included in the final location registration area 504.

  FIG. 6 is a diagram showing an internal configuration of a location registration area storage unit provided in the mobile device. The location registration area storage unit 205 includes a final location registration area information unit 601 and a final location registration area information extension unit 602. As described above, the location registration request response signal 402 transmitted from the network includes information of the registration completion location registration area 402a and the extended registration completion location registration area 402b extended (added) according to the present invention. The information of the registration completion position registration area 402a and the extended registration completion position registration area 402b apparently constitutes one position registration area.

  The final location registration area information section 601 stores information on the location registration area where the location registration was completed last, that is, the registration completion location registration area 402a transmitted from the network. The final location registration area information expansion unit 602 stores information on the extended registration completion location registration area 402b.

(Operations when expanding the location registration area in a mobile device)
Next, the operation of the mobile device 100 when expanding the location registration area according to the present invention will be described. When the mobile device 100 is in the network location registration area (any one of LA1, LA2, and LA3), the receiving unit 202 receives broadcast information transmitted from the network through the antenna 201 (see FIG. 2). The signal analysis unit 204 uses the final location registration area information unit 601 stored in the location registration area storage unit 205 or the final location registration area information extension unit 602 (the current location registration area information included in the received notification information). (See FIG. 6).

  The signal analysis unit 204 includes the information of the registration completion position registration area 402a stored in the final position registration area information unit 601 and the information of the extended registration completion position registration area 402b stored in the final position registration area information extension unit 602. Perform verification. As a result, when the information on the current location registration area received by the broadcast information is not included in the final location registration area information unit 601 or the final location registration area information extension unit 602, the location registration request unit 206 is notified. And instructing to start location registration processing on the network.

  The location registration request unit 206 extracts information of the registration completion location registration area 402a from the final location registration area information unit 601 of the location registration area storage unit 205, and the old location registration area 401a of the location registration request signal 401 (see FIG. 5). Set to. At the same time, the information of the extended registration completion position registration area 402b recorded in the final position registration area information extension unit 602 is extracted and set in the extended old position registration area 401b, and these are set via the transmission unit 203 and the antenna 201. Transmit to the network (base station 101).

  On the other hand, when the current location registration area information received by the notification information is included in the location registration area storage unit 205, the signal analysis unit 204 determines that the location registration procedure is unnecessary and ends the processing. When the location registration process by the network is completed, the mobile device 100 receives the location registration request response signal 402 transmitted from the network by the receiving unit 202 through the antenna 201. The signal analysis unit 204 recognizes that the location registration has been completed normally, and uses the information on the registration completion location registration area 402 a included in the location registration request response signal 402 as the final location registration area information unit 601 of the location registration area storage unit 205. When the location registration request response signal 402 includes information on the extended registration completion location registration area 402b, the extended registration completion location registration area 402b is written in the final location registration area information extension unit 602. At the time of this writing, all the original information already stored is erased. In this way, the mobile device 100 expands the location registration area information stored in the location registration area storage unit 205 according to a network instruction.

(Operation when canceling expansion of location registration area in mobile device)
Next, the operation of the mobile device 100 for canceling the expansion of the position registration area will be described. The mobile device 100 receives the paging request signal 403 (see FIG. 4) transmitted from the network at the time of an incoming call through the antenna 201 by the receiving unit 202. When the paging request signal 403 includes the information of the enlarged position registration release notification 403b, the signal analysis unit 204 deletes all the information recorded in the position registration area storage unit 205 (see FIG. 2) and performs paging. The response unit 207 instructs the network to transmit the paging response signal 404 (see FIG. 4) including the information of the extended location registration cancellation response 404b via the transmission unit 203 and the antenna 201. In this way, the mobile device 100 erases all the enlarged location registration areas (location registration area information) stored in the location registration area storage unit 205 in accordance with network instructions.

  Next, operations for enlarging and releasing the location registration area on the mobile exchange 104 side will be described. When the mobile exchange 104 receives the location registration request signal 401 from the mobile device 100, the mobile exchange 104 executes processing related to expansion of the location registration area. On the other hand, when an incoming call to mobile device 100 occurs, a process for canceling the enlarged location registration area is executed.

(Operations when expanding the location registration area in a mobile exchange)
FIG. 7 is a flowchart for explaining the operation of the mobile exchange 104 when the location registration area is enlarged. When a location registration request signal 401 (see FIG. 5) is transmitted from the mobile device 100, the location registration request signal 401 is received by the receiving unit 301 of the mobile switch 104 via the base station 101 and the base station controller 111. To do.

  As a result, the signal analysis unit 303 of the mobile switch 104 combines the location registration area included in the old location registration area 401a included in the location registration request signal 401 with the location registration area included in the extended old location registration area 401b. The mobile device 100 is located between the apparent location registration area (referred to as location registration area A) and the location registration area (referred to as location registration area B) included in the information of the location location registration area 401c sent simultaneously. Is recorded together with the time in the subscriber information storage unit 304 (step S701).

  Specifically, as shown in FIG. 5, the subscriber information storage unit 304 records the information of the corresponding transition location registration area and the travel time as the location registration area transition record 501 of the past L hours. In the cumulative number of movements 502 in the past L hours, the corresponding transition position registration area and the total number of movements are recorded.

  Further, the signal analysis unit 303 sets the information on the location registration area 401 c included in the location registration request signal 401 in the final location registration area information 504 of the subscriber information storage unit 304.

  Next, during the past P hours, it is determined whether the number of incoming calls Q to the mobile device 100 exceeds a preset threshold value R (Q> R) (step S702). This determination is made with reference to the incoming record 503 of the past P hours in the subscriber information storage unit 304. Here, when the number of incoming calls Q to the mobile device 100 is equal to or less than a preset threshold value R (Q ≦ R) (step S702: No), the mobile device 100 moves in the past for the past L hours. It is determined whether or not the number M of movements between the registered position registration area A and the current position registration area B exceeds a preset threshold value N (M> N) (step S703). .

  This determination is made with reference to the cumulative number of movements 502 in the past L hours in the subscriber information storage unit 304. Here, when the number of movements M of the mobile device 100 exceeds a preset threshold value N (M> N) (step S703: Yes), the combination of the location registration areas A + B is determined, and this combination result is obtained as the subscriber information. The information is recorded in the storage unit 304 and notified to the mobile device 100 (step S704). Specifically, the location registration area B is recorded in the final location registration area information 504, and the location registration area A to be newly combined is recorded in the final location registration area information expansion unit 505.

  Then, it instructs the location registration request response unit 305 to transmit a location registration request response signal 402 (see FIG. 4) to the mobile device 100. The location registration request response unit 305 extracts the final location registration area information 504 in the subscriber information storage unit 304 and the information recorded in the final location registration area information expansion unit 505, respectively. Then, the location registration area B recorded in the final location registration area information 504 is assigned as information of the registration completion location registration area 402a of the location registration request response signal 402, and the final location registration is used as information of the extended registration completion location registration area 402b. The location registration area A recorded in the area information expansion unit 505 is allocated.

  Thereafter, a location registration request response signal 402 is transmitted from the transmitter 302 to the mobile device 100 via the base station controller (RNC) 111 and the base station (BS) 101, and processing for expanding the location registration area is performed. Exit. In this way, the network expands the apparent location registration area based on the movement record and the incoming call record of the mobile device 100.

  On the other hand, when the number of incoming calls Q to the mobile device 100 exceeds a preset threshold value R (Q> R) in step S702 (step S702: Yes), and the number of movements of the mobile device 100 in step S703. When M is less than or equal to a preset threshold value N (M ≦ N) (step S703: No), the final location registration area information of this mobile device 100 is set to B and notified to the mobile device 100 (step S705). The process for enlarging the position registration area is terminated.

(Operations at the time of canceling location registration area expansion in a mobile switching system)
FIG. 8 is a flowchart for explaining the operation of the mobile exchange when the location registration area expansion is canceled. When there is an incoming call to the mobile device 100 from the external relay network, the receiving unit 301 of the mobile switch 104 receives an incoming call request from the relay network. Then, the signal analysis unit 303 recognizes which subscriber (mobile device 100) received the incoming call from the incoming call request, and thereafter, the final location registration area included in the subscriber information storage unit 304 for the corresponding subscriber. The information expansion unit 505 confirms whether or not the expansion position registration area is being applied (step S801).

  When the information is set in the final location registration area information expansion unit 505, it is determined that the expansion location registration area is being applied (step S801: Yes), and the reference is expanded with reference to the incoming record 503 of the past P time of the corresponding subscriber. Decide whether to cancel the location registration area. It is determined whether the number of incoming calls Q in the past P time exceeds a preset threshold value R (Q> R) (step S802).

  Here, when the number of incoming calls Q in the past P time exceeds the threshold value R (Q> R) (step S802: Yes), in order to cancel the enlarged position registration area, all the enlarged position registration areas are used as a basis. Decide to return. Then, the paging request unit 306 notifies the corresponding mobile device 100 via the base station (BS) from the transmitting unit 302 of the paging request signal 403 including the information of the expanded location registration release notification 403b (see FIG. 4). (Step S803).

  Thereafter, it is determined whether or not the paging response signal 404 including the information of the enlarged position registration cancellation response 404b is received from the mobile device 100 (step S804). When the reception unit 301 receives the paging response signal 404 from the mobile device 100 and the signal analysis unit 303 detects that the paging response signal 404 includes the information of the enlarged position registration release response 404b (step (S804: Yes), all the enlarged location registration areas are returned (step S805). Specifically, after all the information recorded in the final location registration area information expansion unit 505 of the subscriber information storage unit 304 is erased, normal incoming call processing is performed (step S806). In this way, the network restores the expanded location registration area for the mobile device 100 with a high incoming frequency based on the incoming frequency of the mobile device 100, and ends the processing for canceling the expansion of the location registration area.

  By the way, if no information is set in the final location registration area information extension unit 505 in step S801, it is determined that the extended location registration area is not applied (step S801: No), and normal incoming call processing is performed (step S801). S806). Similarly, when the number of incoming calls Q in the past P time is equal to or less than the threshold value R (Q ≦ R) in step S802 (step S802: No), and in step S804, the paging response signal 404 from the mobile device 100 is received. If not (step S804: No), next, normal incoming call processing is performed (step S806), and the location registration area enlargement cancellation processing is terminated.

  Next, an overall processing procedure for expanding and releasing the location registration area described above will be described. In the following description, the subscriber information storage unit 304 corresponds to the location register 105 in which the location information of the mobile device 100 is registered, and the mobile switch 104 accesses the subscriber information storage unit 304 as the location register 105 to access the location information. The registration area shall be extended and canceled.

  FIG. 9 is a sequence diagram showing the procedure for expanding the location registration area. In the figure, a mobile device (UE) 100, base stations (BS1 to 3) 101a to 101c covering each location registration area (LA1 to LA3), base station controllers (RNC1 to 3) 111a to 111c, A mobile switch (MSC) 104 and a location register (VLR) 105 are shown and the exchange of signals between the devices is described. Hereinafter, the procedure for expanding the location registration area when the mobile device 100 has moved will be described in detail.

  First, it is assumed that the mobile device 100 has been registered in the location registration area LA1 (step S901). Thereafter, it is assumed that the mobile device 100 has moved into the new location registration area LA2 (step S902). At this time, the mobile device 100 receives broadcast information (LA2) from the base station controller (RNC2) 111b in the location registration area LA2 via the base station (BS2) 101b.

  Based on this notification information, the mobile device 100 recognizes that it has entered a new location registration area (LA2) (step S903). Then, the location registration request signal 401 shown in FIG. 5 is transmitted. The information of the old location registration area 401a of the location registration request signal 401 is the old registration location area LA1. This location registration request signal 401 is sent from the base station (BS2) 101b in the location registration area LA2 to the mobile switching center (MSC) 104 via the base station controller (RNC2) 111b.

  When the subscriber information storage unit 304 (location register 105) in the mobile exchange (MSC) 104 receives the location registration request signal 401, the final location of the mobile unit 100 in the subscriber information storage unit 304 shown in FIG. The registration area information 504 is changed to LA2. Further, the movement of the location registration areas LA1 to LA2 is recorded together with the time in the location registration area transition record 501 for the past L hours (step S904).

  Next, with reference to the incoming record 503 of the past P hours for this mobile device 100, the number of incoming calls Q per unit time does not exceed the threshold R (corresponding to step S702: No in FIG. 7), and the past L It is satisfied that the number M of movements between the location registration areas LA1 to LA2 per unit time exceeds the threshold value N (corresponding to step S703: Yes in FIG. 7) with reference to the cumulative number of movements 502 of time. Judge. If both are satisfied, it is determined that the location registration areas LA1 and LA2 are the same location registration area (LA1 + LA2) (step S905).

  At this time, LA2 is recorded in the final location registration area information 504 of the subscriber information storage unit 304, and LA1 is recorded in the final location registration area information expansion unit 505. Then, the mobile exchange 104 transmits a location registration request response signal 402 shown in FIG. LA2 recorded in the final location registration area information 504 is set as information on the registration completion location registration area 402a of the location registration request response signal 402, and information on the extended registration completion location registration area 402b is used as information on the final location registration area 402b. LA1 recorded in the information expansion unit 505 is set. The location registration request response signal 402 is transmitted from the base station controller (RNC2) 111b in the location registration area LA2 to the mobile device 100 via the base station (BS2) 101b.

  When receiving the location registration request response signal 402, the mobile device 100 writes LA2, which is information on the registration completion location registration area 402a, in the final location registration area information unit 601 of the location registration area storage unit 205. Also, LA1, which is information of the extended registration completion position registration area 402b, is written in the final position registration area information extension unit 602 (step S906).

  Thereafter, it is assumed that the mobile device 100 has moved again to the position registration area LA1 (step S907). At this time, the mobile device 100 receives broadcast information (LA1) from the base station controller (RNC1) 111a in the location registration area LA1 via the base station (BS1) 101a. Based on this notification information, the mobile device 100 recognizes that it has entered the location registration area (LA1). At this time, in the location registration area storage unit 205 of the mobile device 100, LA2 is already written in the final location registration area information unit 601 and LA1 is written in the final location registration area information extension unit 602. That is, when the mobile device 100 moves within the expanded location registration area LA1 + LA2, the mobile device 100 determines that the mobile device 100 moves within the same location registration area and does not activate the location registration procedure (step S908).

  Next, FIG. 10 is a sequence diagram showing a procedure for further expanding the location registration area. The procedure for further expanding the extended position registration area shown in FIG. 9 will be described below.

  It is assumed that the mobile device 100 has been registered in the expanded state of the location registration area LA1 + LA2, and then this mobile device 100 has moved into a new location registration area LA3 (step S1001). At this time, the mobile device 100 receives broadcast information (LA3) from the base station controller (RNC3) 111c in the location registration area LA3 via the base station (BS3) 101c.

  Based on this notification information, the mobile device 100 recognizes that it has entered a new location registration area (LA3) (step S1002). Then, the location registration request signal 401 shown in FIG. 5 is transmitted. The information of the old location registration area 401a of the location registration request signal 401 is the old location registration area LA2, and the information of the extended old location registration area 401b is LA1. This location registration request signal 401 is sent from the base station (BS3) 101c in the location registration area LA3 to the mobile switching center (MSC) 104 via the base station controller (RNC3) 111c.

  When receiving the location registration request signal 401, the subscriber information storage unit 304 in the mobile switching center (MSC) 104 changes the final location registration area information 504 of the mobile device 100 to LA3 as shown in FIG. Further, the movement of the position registration area (LA1 + LA2) ⇔LA3 is recorded together with the time in the position registration area transition record 501 for the past L hours (step S1003).

  Next, with reference to the incoming record 503 of the past P hours for this mobile device 100, the number of incoming calls Q per unit time does not exceed the threshold R (corresponding to step S702: No in FIG. 7), and the past L Referring to the cumulative number of times of movement 502, the number of movements M between the position registration area (LA1 + LA2) 累積 LA3 per unit time has exceeded the threshold value N (corresponding to step S703: Yes in FIG. 7). Determine if it is met. If both are satisfied, it is determined that the location registration areas LA1 + LA2 and LA3 are the same location registration area (LA1 + LA2 + LA3) (step S1004).

  At this time, LA3 is recorded in the final location registration area information 504 of the subscriber information storage unit 304, and LA1 and LA2 are recorded in the final location registration area information expansion unit 505. Then, the mobile exchange 104 transmits a location registration request response signal 402 shown in FIG. LA3 recorded in the final location registration area information 504 is set as information of the registration completion location registration area 402a of the location registration request signal 401, and final location registration area information is set as information of the extended registration completion location registration area 402b. LA1 + LA2 recorded in the expansion unit 505 is set. The location registration request response signal 402 is transmitted from the base station controller (RNC3) 111c in the location registration area LA3 to the mobile device 100 via the base station (BS3) 101c.

  When receiving the location registration request response signal 402, the mobile device 100 writes LA3, which is information of the registration completion location registration area 402a, in the final location registration area information unit 601 of the location registration area storage unit 205. Also, (LA1 + LA2), which is information of the extended registration completion position registration area 402b, is written in the final position registration area information extension unit 602 (step S1005).

  According to the above procedure, each time the frequency of movement of the mobile device 100 with low incoming frequency between different location registration areas exceeds a preset threshold value, these different location registration areas are combined. When the mobile device 100 moves within the newly expanded location registration area, the mobile device 100 does not perform the location registration procedure. Thus, the location registration area is expanded as the mobile device 100 has a higher movement frequency and a lower incoming frequency. In such a mobile device 100, since the ratio of the registered location within the expanded location registration area increases every time the mobile device 100 moves between the location registration areas, the number of times the location registration procedure is activated is reduced. Therefore, useless transmission / reception for location registration between the mobile device 100 and the network can be omitted, and wireless resources can be used efficiently.

  Next, an overall processing procedure for canceling the expansion of the position registration area described above will be described. FIG. 11 is a sequence diagram showing the procedure for canceling the extension of the location registration area. The procedure for canceling the extension of the extended position registration area shown in FIG. 10 will be described below.

  The mobile device 100 is used as one location registration area that is an extension of the location registration area LA1 + LA2 + LA3. Further, it is assumed that the mobile device 100 is located under the location registration area LA2 (step S1101). When an incoming call request to the mobile device 100 is generated, the mobile exchange 104 records the incoming call in the past P time incoming record 503 of the subscriber information storage unit 304 together with the time (step S1102). In addition, referring to the incoming record 503 of the past P time, it is determined whether the number of incoming calls Q of the mobile device 100 within a certain time exceeds a preset threshold value R (corresponding to step S802 in FIG. 8). If so, the mobile exchange 104 determines to restore all location registration areas including the enlarged location registration area (step S1103).

  Then, the mobile exchange 104 activates the paging procedure for all the expanded location registration areas (LA1, LA2, LA3). The mobile switch 104 includes the information of the enlarged position registration release notification 403b in the paging request signal 403 (see FIG. 4) transmitted to the mobile device 100. This enlarged position registration cancellation notification 403b notifies the mobile device 100 that all the position registration areas have been restored.

  The mobile device 100 that has received this information writes information indicating extension cancellation (for example, NULL) to the final location registration area information unit 601 and the final location registration area information extension unit 602 of the location registration area storage unit 205, respectively. (Step S1104). Then, the mobile device 100 includes the information of the extended location registration release response 404b in the paging response signal 404 (see FIG. 4), and confirms that the mobile switch 104 has received the information of the extended location registration release notification 403b normally. Notice.

  Thereafter, the mobile exchange 104 receives the paging response signal 404 including the information of the expanded location registration cancellation response 404b, thereby deleting the information on all the location registration areas related to the mobile device 100 and expanding the location registration area. Are all returned (step S1105). Specifically, the final location registration area information 504 in the subscriber information storage unit 304 and the information stored in the final location registration area information expansion unit 505 are deleted. In this state, mobile device 100 receives the incoming call and is in communication (step S1106).

  Then, after the end of communication, the mobile device 100 recognizes that the location is not currently registered in the network based on the fact that the final location registration area stored in the mobile device 100 is in the extended cancellation state (NULL). Then, a new location registration procedure is started (step S1107). At this time, since the mobile device 100 is located in the location registration area LA2, the mobile device 100 receives broadcast information (LA2) from the corresponding base station control device (RNC2) 111b via the base station (BS2) 101b. The mobile device 100 recognizes that the current location registration area is LA2 based on the notification information, and transmits a location registration request signal 401 (see FIG. 5). At this time, the information of the old location registration area 401a and the extended old location registration area 401b of the location registration request signal 401 is NULL.

  Upon receiving the location registration request signal 401, the mobile switch 104 performs a normal location registration procedure, and changes the final location registration area information 504 of the mobile device 100 in the subscriber information storage unit 304 to LA2 (step S1108). ). Then, the mobile exchange 104 transmits a location registration request response signal 402 shown in FIG. As information of the registration completion position registration area 402a of the position registration request response signal 402, LA2 recorded in the final position registration area information 504 is set. The mobile device 100 writes LA2 as the final location registration area in the final location registration area information unit 601 of the location registration area storage unit 205 (step S1109).

  In this way, the expanded location registration area can be cleared, that is, restored to the original when the frequency of incoming calls to the mobile device 100 exceeds a preset threshold. That is, for the mobile device 100 with a high incoming frequency, the expansion of the location registration area is cancelled. Therefore, it is possible to avoid an increase in the paging signal transmitted from the base station (BS) in a plurality of location registration areas to the mobile device 100 when the mobile device 100 receives a call. As a result, the communication burden on the network is reduced, and wireless resources can be used efficiently.

  As described above, the present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the mobile device 100 does not clear the location registration area information stored in the final location registration area information unit 601 shown in FIG. It is also possible to clear only the information of the enlarged location registration area stored in the. If it is determined whether the location registration area located at the time of clearing is the same as the location registration area recorded in the final location registration area information unit 601, in this case, the location registration request signal is not transmitted to the network. Thus, more efficient use of radio resources can be achieved.

  Further, the above-described method for expanding and canceling the location registration area can be realized by executing a program prepared in advance on a computer such as a personal computer or a workstation. This program is recorded on various recording media and executed by being read from the recording media by a computer. Further, this program may be a transmission medium that can be distributed via a network such as the Internet.

  As described above, according to the present invention, an optimum position registration area can be set in accordance with the moving state of the mobile device. For a mobile device that has a low incoming frequency and moves frequently between location registration areas, the location registration request frequency from the mobile device to the network is reduced by combining a plurality of location registration areas. For mobile devices with high frequency of incoming calls, the combination of multiple location registration areas is canceled at the time of incoming calls, preventing simple expansion of the location registration area and increasing the paging signal transmitted from the network to the mobile device at the time of incoming calls. Can be avoided. Therefore, it is possible to reduce the network communication load and to efficiently use radio resources.

  As described above, according to the present invention, even when the mobile device moves between different location registration areas in the mobile communication network, appropriate location registration corresponding to the moving state is performed, and a new location registration area is created. The present invention is suitable for providing a mobile exchange that can efficiently use radio resources by performing new location registration for the mobile device only when it has moved. In addition, even when the present invention moves between different location registration areas in the mobile communication network, the present invention performs appropriate location registration corresponding to the moving state, and only moves to a new location registration area. It is suitable for providing a mobile device that can efficiently use radio resources by transmitting a registration request. In addition, the present invention performs appropriate location registration corresponding to the moving state in the mobile switch even when the mobile device moves between different location registration areas in the mobile communication network. The present invention is suitable for providing a mobile communication system and a location registration expansion method capable of requesting a new location registration only when moving to a location registration area and efficiently using radio resources.

It is a schematic diagram showing each configuration of a mobile device and a network constituting a mobile communication system according to the present invention, and a location registration area. It is a block diagram which shows the internal structure of a moving apparatus. It is a block diagram which shows the internal structure of a mobile switching device. It is a figure which shows the signal content regarding the expansion and cancellation | release of the location registration area transmitted / received between a mobile device and a network (mobile exchange). It is a figure which shows the data regarding the location registration area stored in the subscriber information storage part of a mobile switch. It is a figure which shows the internal structure of the position registration area memory | storage part provided in a moving apparatus. It is a flowchart explaining operation | movement of the mobile switching device at the time of position registration area expansion. It is a flowchart explaining operation | movement of the mobile switching device at the time of cancellation of position registration area expansion. It is a sequence diagram which shows the expansion procedure of a location registration area. It is a sequence diagram which shows the procedure which further expands a position registration area. It is a sequence diagram which shows the extension cancellation | release procedure of a location registration area. It is a sequence diagram for demonstrating an example of the position registration procedure of the conventional mobile apparatus.

Claims (22)

Incoming call recording means for recording the number of incoming calls for a predetermined period for a mobile device movable between a plurality of location registration areas;
Each time the mobile device moves to a different location registration area, movement recording means for recording a movement state between past location registration areas to which the mobile device has moved,
Based on the number of incoming calls recorded in the incoming call recording means and the movement record between the location registration areas, it is determined whether or not a new location registration area is to be combined with the past location registration area. A location registration area expansion means for recording and notifying the mobile device of a location registration area expanded by the combination;
A mobile exchange characterized by comprising:   The location registration area expanding means does not exceed a predetermined threshold for incoming calls recorded in the incoming call recording means, and between location registration areas within a predetermined time recorded in the moving recording means. The mobile switching device according to claim 1, wherein when the number of times of movement exceeds a predetermined number of times, a new location registration area is combined with a past location registration area.   The paging request means for notifying an incoming call to all of the location registration areas of the mobile device recorded in the mobile recording means when receiving an incoming call to the mobile device. Mobile switch.   Each time the mobile device moves to a new location registration area and receives a location registration request from the mobile device, the movement recording means stores the current location registration area related to the mobile device and the current location registration area. 2. All the old location registration areas that were moved in the past, and information that moved between the old location registration area and the current location registration area are recorded together with time. The mobile switch according to any one of to 3.   When the number of incoming calls recorded in the incoming call recording unit exceeds the incoming threshold when the mobile unit receives an incoming call, the location registration area recorded in the mobile recording unit is cleared, and 4. The mobile switching device according to claim 1, further comprising location registration area expansion cancellation means for notifying cancellation of the expanded location registration area.   6. The mobile switching system according to claim 5, wherein said incoming call recording means records the incoming call information and the incoming call time every time there is an incoming call to said mobile station. The movement recording means is a position registration area storage means for storing a current position registration area to notify the mobile device of a position registration area;
Extended location registration area storage means for storing the location registration area extended by the location registration area extension means;
The mobile switching device according to any one of claims 1 to 3, further comprising: When a location registration request is received from a mobile device, a location registration request response means for notifying the mobile device of a location registration area using a location registration request response signal,
The location registration request response means sets one location registration area currently located in the location registration area storage means as a registration completion location registration area of the location registration request response signal, and the extended location registration The extended location registration area stored in the area storage means is set as an extended registration completion location registration area expanded by the location registration request response signal and notified to the mobile device. 8. The mobile switch according to item 7. A mobile device that is movable between a plurality of location registration areas, wherein the number of incoming calls for a predetermined period to the mobile device does not exceed a predetermined incoming threshold value, and movement between location registration areas within a predetermined time A network including a mobile switch that, when the number of times exceeds a predetermined number of times threshold, combines a new location registration area with a past location registration area and notifies the mobile device of the location registration area expanded by the combination. In a mobile device that can communicate within a plurality of location registration areas having, management of location information during movement by the mobile switch, and exchange control of outgoing / incoming calls,
Each time the registration of the location registration area is notified from the mobile exchange, the location registration area that has been moved in the past is recorded by adding the notified new location registration area, and the location registration expanded from the mobile exchange If the area is notified, the location registration area storage means for recording the expanded location registration area ;
When moving to a new location registration area not recorded in the location registration area storage means, the mobile switch is requested to register the location of the new location registration area, and is recorded in the location registration area storage means. A location registration requesting unit that does not require location registration for the mobile switch, for the movement in the location registration area and the expanded location registration area ;
A mobile device characterized by comprising: The location registration area storage means, and the final location registration area storage means for storing the registration-completed position registration area indicating the location registration area of the one that is currently serving contained in position registration request response signal,
A final location registration area extension storage means for storing an extension registration completion location registration area indicating all location registration areas that have moved in the past included in the location registration request response signal;
The mobile device according to claim 9, further comprising:   When receiving a paging request signal that is an incoming notification from the mobile switch, if the paging request signal includes an expanded location registration release notification, the final location registration area storage means and the final location registration area extension 11. The mobile device according to claim 10, further comprising extended position registration area releasing means for clearing all position registration areas stored in the storage means.   The extended location registration area release means, when all location registration areas have been cleared, includes an extended location registration release response in a paging request response signal transmitted to the mobile switch, and notifies the mobile switch. The mobile device according to the eleventh range. When the extended location registration area release means clears all location registration areas, it writes identification information for re-registration for re-requesting location registration in the location registration area storage means,
The location registration requesting unit requests the location registration of a location registration area currently located in the mobile exchange based on the writing of the re-registration identification information to the location registration area storage unit. The mobile device according to claim 11 or claim 12. A mobile device that can communicate with each other while moving within a plurality of location registration areas of the network, and a mobile switch that manages location information of the mobile device and performs outgoing / incoming exchange control with the mobile device. In a mobile communication system,
The mobile switch is
Incoming call recording means for recording the number of incoming calls for a predetermined period to the mobile device;
Each time the mobile device moves to a different location registration area, a movement recording means for recording a movement state between past location registration areas to which the mobile device has moved,
The number of incoming calls recorded in the incoming recording unit does not exceed a predetermined incoming threshold, and the number of movements between location registration areas within a predetermined time recorded in the movement recording unit is a predetermined number of times. A location registration area extension that combines a new location registration area with a past location registration area and records it in the movement recording means when the threshold is exceeded, and notifies the mobile device of the location registration area expanded by the combination. Means and
The mobile device is
Location registration area storage means for recording the expanded location registration area notified from the mobile switch;
When moving to a new location registration area not recorded in the location registration area storage means, the mobile switch is requested to register the location of the new location registration area and recorded in the location registration area storage means. A mobile communication system, comprising: a location registration requesting unit that does not require location registration for the mobile exchange for movement within a location registration area. The mobile switch is
When the number of incoming calls recorded in the incoming call recording means exceeds the incoming threshold when the incoming call to the mobile device, the location registration area recorded in the mobile recording means is cleared, and the mobile device A location registration area expansion cancellation means for notifying the cancellation of the expanded location registration area,
The mobile device is
When an incoming call notification is received from the mobile exchange, if the incoming call notification includes a notification of cancellation of the location registration area, all location registration areas stored in the location registration area storage means are cleared. 15. The mobile communication system according to claim 14, further comprising extended location registration area releasing means. A location registration expansion method in a mobile switching device that performs communication with a mobile device, manages position information of the mobile device, and performs exchange control of outgoing / incoming calls with the mobile device,
An incoming call recording step for recording the number of incoming calls for a predetermined period to the mobile device;
Each time the mobile device moves to a different location registration area, a movement recording step of recording a movement state between the location registration areas where the mobile device has moved in the past;
When the number of incoming calls does not exceed a predetermined threshold for incoming calls and the number of movements between location registration areas within a predetermined time exceeds a predetermined number of thresholds, a new location is added to the past location registration area. A location registration area expansion step of combining registration areas and notifying the mobile device of a location registration area expanded by the combination;
A location registration expansion method comprising: An incoming call detection step for detecting an incoming call to the mobile device;
Location registration area extension that refers to the number of incoming calls when the incoming call is detected and clears the location registration area recorded for the mobile device when the number of incoming calls exceeds a predetermined threshold of incoming calls Release process,
A location registration area extension cancellation notification step for notifying the mobile device of the cancellation of the extended location registration area;
17. The location registration expansion method according to claim 16, further comprising: A mobile device that is movable between a plurality of location registration areas, wherein the number of incoming calls for a predetermined period to the mobile device does not exceed a predetermined incoming threshold value, and movement between location registration areas within a predetermined time A network including a mobile switch that, when the number of times exceeds a predetermined number of times threshold, combines a new location registration area with a past location registration area and notifies the mobile device of the location registration area expanded by the combination. moving at plural location registration areas with, a location registration extension method in the mobile device for requesting a location registration to the mobile exchange managing the location information by the mobile,
A location registration requesting step for requesting a new location registration for the mobile exchange when moving to a new location registration area with reference to a record of a location registration area moved in the past;
Based on the notification of the location registration request response from the mobile exchange, the location registration area that has been moved in the past is added and recorded , and the location registration area expanded from the mobile exchange is recorded. If notified, a location registration area storage step for recording the expanded location registration area ;
A location registration expansion method comprising:   When receiving an incoming call notification from the mobile switch, if the incoming call notification includes an extended location registration release notification, an extended location registration area release that clears all location registration areas recorded in the mobile device 19. The location registration expansion method according to claim 18, further comprising a step. A location registration expansion method in which a mobile device moves within a plurality of location registration areas of a network, and location information related to the mobile device is managed by a mobile exchange,
A movement recording step of recording a location registration area where the mobile device has moved in the past;
An incoming call recording step for recording the number of incoming calls for a predetermined period to the mobile device;
When the number of incoming calls does not exceed a predetermined threshold for incoming calls and the number of movements between location registration areas within a predetermined time exceeds a predetermined number of thresholds, a new location is added to the past location registration area. A moving record expansion process that records by combining registration areas;
An extended notification step of notifying the mobile device of the location registration area expanded by the combination;
A location registration expansion method comprising:   Including a location registration requesting step for making a request for a new location registration from the mobile unit to the mobile switch only when moving to a new location registration area based on the record of the combined location registration area. 21. The location registration expansion method according to claim 20, characterized in that the location registration is extended.   A location registration area extension cancellation step of clearing the extended location registration area when the number of incoming calls to the mobile device exceeds the incoming call threshold when receiving an incoming call to the mobile device. Item 21. The location registration expansion method according to item 20.

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