JP2012170037A - Mobile communication system, mobile communication method, communication processing device, and control method and control program therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a position registration load in a mobile terminal, a base station and a network, by suppressing the frequency of position registration at movement inside and outside a cell range of a compact BTS.SOLUTION: A mobile communication system in which a plurality of cells of different sizes are overlaid includes: a plurality of base stations which control mobile stations respectively existent in a plurality of cells; the mobile stations which moves among a plurality of cells; and a position registration server which registers the existing positions of the mobile stations in the respective cells. Each mobile station includes a position registration controller which notifies the position registration server when moving from a first cell having a first size to a second cell having a second size smaller than the first size included in the first cell, and when moving from the second cell to the first cell, delays notification for a predetermined time before the notification of the movement between the cells to the position registration server, and controls not to notify the position registration server of the movement between the cells, if the mobile station returns to the second cell during the delay of the predetermined time.

Description

  The present invention relates to a mobile station location registration technique in a mobile communication system.

  In the above technical field, Patent Document 1 describes a wide area when trains or buses move across the boundary of a location registration area in a configuration in which location registration areas overlap hierarchically (a narrow area and a wide area including it). A technique for delaying location registration is disclosed. This technique prevents a large amount of location registration from occurring at one time and loads from being concentrated. In Japanese Patent Application Laid-Open No. 2004-228688, the position registration is performed in duplicate in a plurality of layers, so that the position can be confirmed even if the position registration is delayed. On the other hand, Patent Document 2 discloses a technique for setting a middle radio zone of a middle radio base station that covers a small radio zone of a small radio base station so that a mobile terminal can receive a call even outside the small radio zone of the small radio base station. Has been. In Patent Document 2, the location registration is not performed in any of the wireless zones, and the location registration is not repeated in a plurality of layers. When calling a mobile terminal, first call in the small wireless zone, and if there is no response, call the large wireless zone in order, so that if the user's mobile terminal is out of the small wireless zone, it will be located in the middle wireless zone Registration will be carried out.

JP 2006-128897 Japanese Patent No. 2786485

  However, the above prior art has no idea about reducing the location registration process itself by a radio base station (hereinafter referred to as BTS: Base Transceiver Station) in each mobile radio area (so-called cell). For example, in Patent Document 1, location registration in a large location registration area is once delayed, but location registration is performed after the delay because the purpose is to avoid concentration of location registration. On the other hand, in Patent Document 2, unlike Patent Document 1, the process of registering the position overlapping a plurality of hierarchies does not occur. However, in order to enable continuous position confirmation, a new position is always required if the position registration area changes. Location registration in the registration area is performed.

  In the future, when a small BTS that accommodates only a specific small number of users becomes widespread, the following problems will occur. In the technique of Patent Document 2, it is necessary to perform location registration on the network every time a mobile terminal (hereinafter referred to as UE: User Equipment) moves in and out of a cell range formed by a small BTS. This increases the location registration load on the mobile terminal, base station, and network. On the other hand, in the technique of Patent Document 1, a small BTSB is configured in addition to a call for a cell formed by a macro BTS that accommodates an unspecified number of users in a location registration area, which has become a plurality of layers when a UE is called. A call to the cell is also required. Therefore, the load of page signal processing (hereinafter referred to as paging) on the network increases.

  The objective of this invention is providing the technique which solves the above-mentioned subject.

In order to achieve the above object, a system according to the present invention provides:
A mobile communication system in which a plurality of cells having different sizes are superimposed,
A plurality of base stations that control mobile stations located in each of the plurality of cells;
A mobile station moving between the plurality of cells;
A location registration server for registering the location of the mobile station;
When the mobile station moves from a first cell of a first size to a second cell of a second size smaller than the first size included in the first cell, the mobile station notifies the location registration server, and When moving from two cells to the first cell, a delay of a predetermined time is performed before notifying the location registration server of the movement between cells, and the mobile station moves to the second cell during the delay of the predetermined time. It has a location registration control means for controlling not to notify the location registration server of the movement between cells if it returns.

In order to achieve the above object, the method according to the present invention comprises:
A mobile communication method in a mobile communication system in which a plurality of cells having different sizes are overlapped,
When the mobile station moves from the first cell of the first size to the second cell of the second size smaller than the first size included in the first cell, the movement between the cells is within the area of the mobile station When notifying the location registration server for registering the location and moving from the second cell to the first cell, a delay of a predetermined time is performed before notifying the location registration server of the movement between the cells. Controlling to not notify the location registration server of movement between cells if the mobile station returns to the second cell during a delay;
The location registration server registering the location of the mobile station;
The location registration server registers the first cell, the second cell included in the first cell, and the mobile station accommodated in the second cell in association with each other;
In response to a paging instruction to the target mobile station, the location registration server is configured to register the second cell in which the location of the target mobile station is registered and the entire first cell including the second cell or Paging against some, and
It is characterized by including.

In order to achieve the above object, an apparatus according to the present invention provides:
A communication processing apparatus that moves between the plurality of cells in a mobile communication system in which a plurality of cells having different sizes are superimposed,
When moving from the first cell of the first size to the second cell of the second size smaller than the first size included in the first cell, the location of the communication processing device is registered for the movement between the cells. Notification means for notifying the location registration server
When moving from the second cell to the first cell, delay means for delaying a predetermined time before notifying the location registration server of movement between cells by the notification means;
Control means for controlling not to notify the location registration server of movement between cells if the communication processing device returns to the second cell during the delay of the predetermined time;
It is characterized by providing.

In order to achieve the above object, the method according to the present invention comprises:
In a mobile communication system in which a plurality of cells having different sizes are superimposed, a control method for a communication processing apparatus that moves between the plurality of cells,
When moving from the first cell of the first size to the second cell of the second size smaller than the first size included in the first cell, the location of the communication processing device is registered for the movement between the cells. A notification step for notifying the location registration server
When moving from the second cell to the first cell, a delay step of delaying a predetermined time before notifying the location registration server of the movement between cells by the notification step;
A control step of controlling not to notify the location registration server of movement between cells if the communication processing device returns to the second cell during the delay of the predetermined time;
It is characterized by including.

In order to achieve the above object, a program according to the present invention provides:
A control program for a communication processing apparatus that moves between the plurality of cells in a mobile communication system in which a plurality of cells having different sizes are superimposed,
When moving from the first cell of the first size to the second cell of the second size smaller than the first size included in the first cell, the location of the communication processing device is registered for the movement between the cells. A notification step for notifying the location registration server
When moving from the second cell to the first cell, a delay step of delaying a predetermined time before notifying the location registration server of the movement between cells by the notification step;
A control step of controlling not to notify the location registration server of movement between cells if the communication processing device returns to the second cell during the delay of the predetermined time;
Is executed by a computer.

In order to achieve the above object, an apparatus according to the present invention provides:
In a mobile communication system in which a plurality of cells having different sizes are superimposed, a communication processing device for registering a location of a mobile station moving between the plurality of cells,
Position registration means for registering the location of the mobile station;
Cell registration means for associating and registering a first cell, a second cell included in the first cell, and a mobile station accommodated in the second cell;
In response to the paging instruction to the target mobile station, for the second cell in which the area of the target mobile station is registered and the whole or a part of the first cell including the second cell Paging means for paging;
It is characterized by providing.

  ADVANTAGE OF THE INVENTION According to this invention, the location registration load in a mobile terminal, a base station, and a network can be reduced by suppressing the location registration frequency at the time of moving inside and outside the cell range of a small BTS.

1 is a block diagram showing a configuration of a mobile communication system according to a first embodiment of the present invention. It is a block diagram which shows the structure of the mobile communication system which concerns on 2nd Embodiment of this invention. It is a sequence diagram which shows the position registration operation | movement of the mobile communication system which concerns on 2nd Embodiment of this invention. It is a sequence diagram which shows the paging response operation at the time of the large cell presence of the mobile communication system which concerns on 2nd Embodiment of this invention. It is a sequence diagram which shows the paging response operation | movement at the time of the small cell presence of the mobile communication system which concerns on 2nd Embodiment of this invention. It is a sequence diagram which shows the paging response operation | movement when it leaves to a macrocell from the small cell of the mobile communication system which concerns on 2nd Embodiment of this invention. It is a block diagram which shows the structure of the position registration server which concerns on 2nd Embodiment of this invention. It is a figure which shows the structure of the small BTS accommodation information storage part which concerns on 2nd Embodiment of this invention. It is a figure which shows the structure of the location registration area memory | storage part which concerns on 2nd Embodiment of this invention. It is a flowchart which shows the process sequence of the location registration server which concerns on 2nd Embodiment of this invention. It is a flowchart which shows the process sequence of the paging signal transmission process which concerns on 2nd Embodiment of this invention. It is a flowchart which shows the process sequence of the call response reception process which concerns on 2nd Embodiment of this invention. It is a flowchart which shows the process sequence of the call response waiting timer timeout process which concerns on 2nd Embodiment of this invention. It is a block diagram which shows the structure of the small BTS which concerns on 2nd Embodiment of this invention. It is a figure which shows the structure of the small BTS accommodation information storage part which concerns on 2nd Embodiment of this invention. It is a flowchart which shows the process sequence of small BTS which concerns on 2nd Embodiment of this invention. It is a block diagram which shows the structure of UE which concerns on 2nd Embodiment of this invention. It is a figure which shows the position registration algorithm which concerns on 2nd Embodiment of this invention. It is a flowchart which shows the process sequence of UE which concerns on 2nd Embodiment of this invention. It is a flowchart which shows the process sequence of the position registration process which concerns on 2nd Embodiment of this invention. It is a block diagram which shows the structure of the mobile communication system which concerns on 3rd Embodiment of this invention. It is a figure which shows the structure of the small BTS accommodation information storage part of the location registration server which concerns on 3rd Embodiment of this invention. It is a flowchart which shows the process sequence of the call response waiting timer timeout process which concerns on 3rd Embodiment of this invention. It is a flowchart which shows the process sequence of the call response waiting timer timeout process which concerns on 4th Embodiment of this invention.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the components described in the following embodiments are merely examples, and are not intended to limit the technical scope of the present invention only to them.

[First Embodiment]
A mobile communication system 100 as a first embodiment of the present invention will be described with reference to FIG. The mobile communication system 100 is a system in which a plurality of cells 111 and 121 having different sizes are superimposed.

  As shown in FIG. 1, the mobile communication system 100 moves between a plurality of base stations 110 and 120 that control mobile stations located in each of the plurality of cells 111 and 121 and a plurality of cells 111 and 121. Mobile stations 130-1 to 130-4 and a location registration server 140 for registering the location of the mobile station.

  The mobile stations 130-1 to 130-4 have a location registration control unit 130a. When the location registration control unit 130a moves from the first cell 111 of the first size to the second cell 121 of the second size smaller than the first size included in the first cell 111 (130-1 → 130-2) ), And notifies the location registration server 140 of the movement between cells. On the other hand, when moving from the second cell 121 to the first cell 111 (130-2 → 130-3), a delay t0 of a predetermined time is performed before notifying the location registration server 140 of the movement between the cells. If the mobile station 130-3 returns to the second cell 121 during the delay t0 of the predetermined time, control is performed so as not to notify the location registration server 140 of the movement between the cells.

  According to the present embodiment, the location registration load in the mobile terminal, the base station, and the network can be reduced by suppressing the location registration frequency when moving inside and outside the small second cell range.

[Second Embodiment]
In the second embodiment, a location registration area (hereinafter also referred to as a large cell) composed of a plurality of macro cells controlled by a plurality of macro radio base stations (hereinafter referred to as macro BTSs) that are basically fixed, and one movable cell A mobile communication system including a small cell controlled by a small radio base station (hereinafter, small BTS). Many small cells are set in large cells. A mobile terminal (hereinafter referred to as UE) located in a small cell is controlled only by the corresponding small BTS, and communication between the macro BTS of the UE and the small BTS is performed exclusively. In such a mobile communication system, when a UE frequently enters and exits a large cell by a macro cell from a small cell, the location registration is delayed when moving from the small cell to the location registration area. In addition, when a UE is called by a page signal (hereinafter also referred to as paging), a cell registered at the current location is first called, and if there is no response, a neighboring cell is called. According to the present embodiment, the location registration load in the mobile terminal, the base station, and the network is reduced by suppressing the location registration frequency when moving in and out of the small cell range and reducing the recall due to paging failure. Can be reduced.

<< Configuration of Mobile Communication System of this Embodiment >>
FIG. 2 is a block diagram showing the configuration of the mobile communication system 200 according to this embodiment. In FIG. 2, the mobile communication system 200 includes a UE 230, a macro BTS 210, a small BTS 220, a BTS controller 250, a core network (CN) 260, and a location registration server 240. The UE 230 is a wireless terminal for a user to perform mobile communication. The macro BTS 210 and the small BTS 220 are radio base stations that perform conversion between data transmitted / received wirelessly to / from the UE 230 and data transmitted / received wiredly between the network side. The BTS control device 250 is a device for controlling the macro BTS 210 and the small BTS 220. The location registration server 240 stores the location information of each UE 230. And it is an apparatus for implementing a call (Paging) with respect to the location registration area where UE230 exists at the time of UE230 call. In addition, each apparatus which comprises the mobile communication system 200 can be named generically as a communication processing apparatus.

  In the mobile communication system 200 of FIG. 2, 211 is a macro cell indicating the control range of the macro BTS 210. A location registration area A (212), which is a large cell, is formed by a plurality of macro cells 211 formed by a plurality of macro BTSs 210. On the other hand, reference numeral 221 denotes location registration areas B to F which are small cells corresponding to the small cells indicating the respective control ranges of the small BTS 220. Each BTS of the macro BTS 210 and the small BTS 220 transmits unique broadcast information for each location registration area to the UE 230 in the cell. The UE 230 knows the location registration area where the UE 230 itself exists based on the broadcast information transmitted from each BTS. When detecting a change in the location registration area, the UE 230 transmits a location registration request to the corresponding BTS, and forwards it to the location registration server 240 via the BTS and the BTS control device 250. Thereby, the location registration server 240 always knows the location registration area where each UE 230 exists.

<< Sequence of Mobile Communication System According to this Embodiment >>
Hereinafter, the operation sequence of each component of the present embodiment in the mobile communication system 200 of FIG. 2 will be described.

(Location registration operation sequence)
FIG. 3 is a sequence diagram showing the location registration operation. In FIG. 3, the UE 230 location registration process when the UE 230 enters the small cell 221 of the small BTS 220 that accommodates the UE 230 and the UE 230 location registration process when the UE 230 exits the small cell 221 of the small BTS 220 are shown. It is shown in the figure.

  First, in order to implement the location registration process of the present embodiment, the small BTS 220 is connected to the mobile communication system 200 in step S301. At this time, in step S303, the small BTS 220 transmits the small BTS accommodation information in which the UE 230 accommodated in the small BTS 220 is registered to the location registration server 240. In step S305, the location registration server 240 updates the small BTS accommodation information held in the location registration server 240 with the received small BTS accommodation information. Such small BTS accommodation information is updated when a new small BTS 220 is connected to the mobile communication system 200 or disconnected from the mobile communication system 200, or the small BTS accommodation information registered in the small BTS 220 is changed. It is executed when

  In step S307 in FIG. 3, the UE 230 moves from one of the macro cells 211 constituting the location registration area A (212) to one of the small cells 221 (members) that accommodates the UE 230. In step S309, the UE 230 that has received the notification information from the small BTS 220 notifies the location registration server 240 of the location registration via the small BTS 220 and the BTS control device 250 as the transmission source. The location registration server 240 receives the location registration notification, and updates the location information of the UE 230 registered in the location registration server 240 to the source small BTS 220 in step S311.

  Here, assuming that the UE 230 leaves the small cell 221 and moves to one of the macro cells 211 constituting the location registration area A (212), the UE 230 detects by receiving broadcast information from the macro BTS 210 in step S313. . In step S315, the UE 230 starts a timer. In step S317, the UE 230 determines from the received broadcast information whether the UE 230 has returned to the original small cell 221 before timeout. If the original small cell 221 is returned before the time-out, the location registration is not updated and the location registration server 240 maintains the location information of the original small cell 221. On the other hand, if time-out occurs, in step S319, the location registration server 240 is notified of location registration via the macro BTS 210 and BTS control device 250 that are the transmission source of the received notification information. The location registration server 240 receives the location registration notification, and updates the location information of the UE 230 registered in the location registration server 240 to the source macro BTS 210 in step S321.

(Sequence of paging response operation when a large cell is located)
FIG. 4 is a sequence diagram showing a paging response operation when the large cell 212 is present. This paging response operation is performed in the state before the UE 230 enters the small cell 221 in FIG. 3 or in the state where the small cell 221 is timed out and the location registration area of the UE 230 is updated to the large cell 212 by the macro BTS 210. Is the operation.

  When a call to the target mobile station UE 230 (Paging) occurs in step S401, the location registration server 240 reads the registered location registration area of the target UE 230 in step S403. When the large cell 212 is present, paging to a plurality of macro BTSs 210 constituting the large cell 212 is instructed. In step S405, paging is executed via the BTS control device 250 and the plurality of macro BTSs 210. In step S407, a response waiting timer is started in order to determine a timeout of a response to paging.

  In step S409, the UE 230 that has received the page signal responds to the page signal for checking the location. In step S <b> 411, the UE 230 returns a response signal to the location registration server 240 via the macro BTS 210 and the BTS control device 250 that are the source of the page signal received by the UE 230.

  When receiving the response signal, the location registration server 240 stops the response waiting timer in step S413, and confirms that the UE 230 is in the registered location registration area. Since the communication path passing through the macro BTS 210 and the BTS control device 250 has been confirmed, the call connection process is continued through the communication path in step S415.

(Sequence of paging response operation when a small cell is located)
FIG. 5 is a sequence diagram showing a paging response operation when the small cell is in the service area. This paging response operation is an operation in the state after the UE 230 enters the small cell 221 in FIG. 3 or the state after returning from the small cell 221 to the original small cell 221 before timeout.

  When a call (Paging) to the UE 230 occurs in step S501, the location registration server 240 reads the location registration area of the registered target UE 230 in step S503. When the small cell 221 is located, paging to the small BTS 220 corresponding to the small cell 221 in the area is instructed. In step S505, paging is executed via the BTS control device 250 and the small BTS 220. In step S507, a response waiting timer is started in order to determine a timeout of a response to paging.

  In step S509, the UE 230 that has received the page signal responds to the page signal to confirm the location. In step S <b> 511, the UE 230 returns a response signal to the location registration server 240 via the small BTS 220 and the BTS control device 250 that are the transmission source of the page signal received by the UE 230.

  When receiving the response signal, the location registration server 240 stops the response waiting timer in step S513, and confirms that the UE 230 is located in the registered location registration area. Since the communication path passing through the small BTS 220 and the BTS control device 250 has been confirmed, the call connection process is continued through the communication path in step S515.

(Sequence of paging response operation when moving from small cell to large cell)
FIG. 6 is a sequence diagram showing a paging response operation when the small cell 221 leaves the large cell 212. This paging response operation is an operation in the state when the UE 230 exits the small cell 221 after entering the small cell 221 and performing location registration in FIG.

  When a call (Paging) to the UE 230 occurs in step S601, the location registration server 240 reads the registered location registration area of the target UE 230 in step S603. When the small cell 221 is located, paging to the small BTS 220 corresponding to the small cell 221 in the area is instructed. In step S605, paging is executed via the BTS controller 250 and the small BTS 220. In step S607, a response waiting timer is started in order to determine a timeout of a response to paging.

  Since the UE 230 has left the small cell 221, it cannot receive the page signal and cannot respond. If the UE 230 remains outside the small cell 221, the response waiting timer times out in step S609. When time-out occurs, in step S611, the location registration server 240 associates and registers the large cell, the small cell included in the large cell, and the UE accommodated in each small cell (FIG. 8). Read). Then, a large cell (or macro cell) adjacent to the small cell that has timed out is set as a paging destination. In step S613, paging is executed via the BTS controller 250 and the plurality of macro BTSs 210. In step S615, a response waiting timer is started to determine a timeout for a response to paging.

  In step S617, the UE 230 that has received the page signal responds to the page signal for checking the location. In step S <b> 619, the UE 230 returns a response signal to the location registration server 240 via the macro BTS 210 and the BTS control device 250 that are the source of the page signal received by the UE 230.

  When receiving the response signal, the location registration server 240 stops the response waiting timer in step S621 and confirms that the UE 230 is in the registered location registration area. Since the communication path passing through the macro BTS 210 and the BTS control device 250 has been confirmed, in step S623, the call connection process is continued through the communication path.

<< Configuration of location registration server >>
FIG. 7 is a block diagram showing the configuration of the location registration server 240 according to this embodiment.

  The location registration server 240 of FIG. 7 includes a location registration / call processing unit 710 that processes location registration of the UE 230 and paging to the UE 230. Further, the location registration server 240 includes a signal transmission / reception interface 720 for communicating with the UE 230 via the core network 260, the BTS control device 250, the macro BTS 210, and the small BTS 220. The signal transmission / reception interface 720 has a function of distributing a signal received from the outside to each processing unit and a function of transmitting a signal received from each processing unit to the outside.

  The location registration / call processing unit 710 includes a call signal receiving unit 711 that receives a call signal from the UE 230 and activates a call signal transmission process by the call signal transmission unit 712. Moreover, it has the location registration area memory | storage part 713 for managing the location registration area where each UE230 exists. In addition, there is a small BTS accommodation information storage unit 714 that is also a small cell registration unit for managing the correspondence between small BTSs existing (adjacent) in each location registration area and UE identifiers accommodated by each small BTS. In addition, a call signal transmission unit 712 that determines a call signal transmission destination cell from the information on the location registration area where the UE 230 is located and the small BTS accommodation information, transmits a call signal, and activates a response waiting timer. Further, it has a call response receiving unit 716 that receives a call signal response from the UE 230 and stops the timer of the call response waiting timer unit 715. Further, it has a small BTS accommodation information receiving unit 717 that receives accommodation information from the small BTS 220 and updates the small BTS accommodation information. Moreover, it has the location registration signal receiving part 718 which receives the location registration signal from UE230 and updates the location registration information of the said UE230. In addition, it has a response waiting time 715a for waiting for a paging signal response, and has a paging response waiting timer unit 715 for starting a paging signal transmission process for a macro BTS constituting a large cell when a timeout occurs.

  Each functional component of the location registration server 240 includes a part realized by hardware or a part realized by software by the CPU executing a program. 7 is an essential element in the present embodiment, and components corresponding to other functions of the location registration server 240 are not illustrated.

(Configuration of small BTS accommodation information storage unit)
FIG. 8 is a diagram illustrating a configuration of the small BTS accommodation information storage unit 714.

  In FIG. 8, 801 stores a large cell, which is a location registration area composed of a plurality of macro BTSs 210 in this example. In association with this large cell, a small cell 802, which is a location registration area of a small BTS included in the large cell, and mobile terminal information 803 accommodated in each small cell are registered. The mobile terminal information 803 accommodated in each small cell is notified from each small cell when the small cell is connected to the mobile communication system 200, and is stored in association with the large cell including the small cell.

(Configuration of location registration area storage unit)
FIG. 9 is a diagram illustrating the configuration of the location registration area storage unit 713.

  In FIG. 9, 901 stores the identifiers of all UEs in the area to be managed by the location registration server 240. A location registration area 903 notified by the UE is registered in association with the identifier 901 of each UE. “B”, “A”, and “E” in FIG. 9 correspond to the cells in FIG.

<< Processing procedure of location registration server >>
FIG. 10 is a flowchart showing a processing procedure of the location registration server 240 according to the present embodiment. This flowchart is executed by the CPU that controls the location registration server 240 while using the RAM as a temporary storage, thereby realizing the processing of each functional component of FIG.

  First, in step S1010, it is determined whether the accommodation information indicating the UE to be accommodated from the small BTS has been received. If it is reception of accommodation information, it will progress to step S1012 and will memorize | store the received accommodation information in the small BTS accommodation information storage part 714 (refer FIG. 8).

  In step S1020, it is determined whether location registration information from the UE is received via the macro BTS or the small BTS. If it is position registration information, the process proceeds to step S1022, and the received position registration information is stored in the position registration area storage unit 713 (see FIG. 9).

  In step S1030, it is determined whether or not the UE is paging. If it is a paging process, it will progress to step S1032 and will perform the transmission process of a calling signal (refer FIG. 11). Thereafter, in steps S1034 and S2038, it is determined whether a response signal to the paging from the UE has been received or whether the response waiting timer has timed out. If a response signal is received, the process proceeds to step S1036 and a call response reception process is performed (see FIG. 12). On the other hand, if timed out, the process proceeds to step S1040 to perform a time-out process for the call response waiting timer (see FIG. 13). In step S1042, it is determined whether or not a page response waiting flag that is set when the small BTS or macro BTS is paged is ON. If the page response waiting flag is ON, the process returns to step S1034 to determine again whether the response is received or timed out. If the page response wait flag is OFF, the process is terminated.

(Call signal transmission processing procedure)
FIG. 11 is a flowchart showing the processing procedure of the call signal transmission processing (S1032).

  When a call event occurs, first, in step S1101, the location registration area storage unit 713 is accessed to confirm the location registration area where the UE to be called exists. Next, in step S1103, the small BTS accommodation information storage unit 714 is accessed, and the location registration area configured by the small BTS accommodating the UE to be called is confirmed. In step S1105, it is determined whether or not both match.

  If they match, the process proceeds to step S1107, and Page signal transmission is performed only for the corresponding small BTS. In step S1109, the page response waiting flag for the small BTS is turned ON. In step S1111, the response waiting timer is started and the process returns. On the other hand, if they do not match, the process proceeds to step S1113, and Page signal transmission is performed for all macro BTSs in the corresponding location registration area. In step S1115, the macro BTS page response wait flag is set to ON. In step S1117, a response wait timer is started and the process returns.

(Processing procedure for call response reception processing)
FIG. 12 is a flowchart showing the procedure of the call response reception process (S1036).

  When a call response is received from the UE, the page response wait flag is turned OFF in step S1201. Then, after confirming the terminal presence cell in step S1203, the call connection process is continued in step S1205 and the process returns.

(Processing procedure for call response waiting timer timeout processing)
FIG. 13 is a flowchart showing the processing procedure of the call response wait timer timeout processing (S1040).

  When a call response wait time-out occurs, the BTS type in which the time-out has occurred is determined in step S1301 (that is, whether the page response wait flag is for a macro BTS or a small BTS). The operation is as follows according to the BTS type in which a timeout has occurred according to the determination result.

  If the macro BTS page response wait timeout has occurred, the process advances to step S1303 to turn off the macro BTS page response wait flag. Then, in step S1305, the call processing failure determination is made, and the process returns. On the other hand, if the page response wait timeout for small BTS, the process proceeds to step S1307, and the page response wait flag for small BTS is first turned OFF. Thereafter, in step S1309, a Page signal is transmitted to all macro BTSs in the position registration area adjacent to the position registration area of the small BTS, and in step S1311, the macro BTS page response wait flag is turned ON. In step S1313, the macro BTS page response wait timer is started and the process returns.

<< Configuration of small BTS >>
FIG. 14 is a block diagram showing a configuration of a small BTS 220 according to the present embodiment.

  The small BTS 220 in FIG. 14 includes a location registration processing unit 1410 that processes location registration of the UE 230. In addition, a radio signal transmission / reception unit 1420 for the small BTS 220 to perform radio communication with the UE 230 and a signal transmission / reception interface 1430 for the small BTS 220 to communicate with the location registration server 240 are provided. The signal transmission / reception interface 1430 has a function of distributing a signal received from the outside to each processing unit and a function of transmitting a signal received from each processing unit to the outside.

  The location registration processing unit 1410 includes a notification information transmission unit 1411 that transmits notification information to the UE 230. Moreover, it has the small BTS accommodation information storage part 1412 which memorize | stores the small BTS accommodation information of this small BTS220. In addition, a small BTS accommodation information transmission unit 1413 that transmits small BTS accommodation information, which is information of UEs accommodated in the small BTS 220, to the location registration server 240 is provided. Moreover, it has the location registration receiving part 1414 which receives the location registration from UE230. Further, it has a location registration transmission unit 1415 that is activated by reception of the location registration by the location registration reception unit 1414 and transmits the location registration to the location registration server 240.

  In addition, a page signal receiving unit 1416 that receives a page signal from the location registration server 240 is provided. Moreover, it has the page signal transmission part 1417 started by the received page signal and unicasting a page signal to object UE. Further, it has a call response receiver 1418 for receiving a response signal in response to reception of the page signal from the UE. Further, it has a call response transmission unit 1419 that transmits a response signal activated and received by the call response reception unit 1418 to the location registration server 240.

  Each functional component of the small BTS 220 includes a part realized by hardware or a part realized by software by a CPU executing a program. 14 is an indispensable element for this embodiment, and components corresponding to other functions of the small BTS 220 are not shown.

(Configuration of small BTS accommodation information storage unit)
FIG. 15 is a diagram illustrating a configuration of the small BTS accommodation information storage unit 1412.

  In FIG. 15, 1501 stores identifiers of all UEs accommodated in the small BTS 220. Location information indicating whether or not the UE is located in the small cell of the small BTS 220 is registered in association with the identifier 1501 of each UE. The small BTS accommodation information transmission unit 1413 transmits the identifiers 1501 of all the accommodated UEs, and the location registration transmission unit 1415 transmits the area information 1502 when the area information is in the area. Equivalent to.

《Small BTS processing procedure》
FIG. 16 is a flowchart showing a processing procedure of the small BTS according to the present embodiment. This flowchart is executed by the CPU that controls the small BTS 220 while using the RAM as a temporary storage, thereby realizing the processing of each functional component in FIG.

  First, in step S1610, it is determined whether the initial setting is made when the small BTS 220 is connected to the mobile communication system 200 (or when the small BTS 220 is powered on). If it is initial setting, it will progress to step S1612 and will read the information about UE accommodated in this small BTS as small BTS accommodation information from the small BTS accommodation information storage part 1412. In step S <b> 1614, the small BTS accommodation information is transmitted to the location registration server 240 via the signal transmission / reception interface 1430.

  In step S1620, it is determined whether notification information is transmitted. If it is the transmission of the broadcast information, the process proceeds to step S1622, and broadcast information that can identify the small BTS 220 is broadcast to the range of the small cell 221 via the radio signal transmitting / receiving unit 1420. In step S1630, it is determined whether the location registration is received from the UE. If the position registration is received, the process proceeds to step S1632, and the position registration is transmitted to the position registration server 240 via the signal transmission / reception interface 1430.

  In step S1640, it is determined whether a page signal for paging is received from position registration server 240. If it is reception of a page signal, it will progress to step S1642 and will unicast a page signal to object UE. In step S1650, it is determined whether a call response is received from the UE that has received the page signal. If a call response is received from the UE, the process proceeds to step S1652, and a call response signal is transmitted to the location registration server 240.

<< Configuration of UE >>
FIG. 17 is a block diagram showing a configuration of the UE 230 according to the present embodiment.

  17 includes a location registration processing unit 1710 that processes location registration in the location registration server 240. In addition, UE 230 includes a radio signal transmission / reception unit 1420 for radio communication with macro BTS 210 or small BTS 220, and a signal transmission / reception interface 1430 for small BTS 220 to communicate with location registration server 240.

  The location registration processing unit 1710 includes a notification information receiving unit 1711 that receives notification information from the macro BTS 210 or the small BTS 220 and activates the position registration transmission unit. Further, it has a position information storage unit 1713 for storing the position registration information last notified to the position registration server 240. Also, a position registration transmission delay time 1714a is held, the elapsed time after moving from the position registration area under the small BTS to the position registration area under the macro BTS is monitored, and the position registration transmission unit 1712 is activated after a predetermined time has elapsed. A registration transmission timer unit 1714 is included. In addition, it has a location registration transmission unit 1712 that is activated from the notification information reception unit 1711 or the location registration transmission timer unit 1714 and that transmits location registration and updates location information managed by the location information storage unit 1713. The location registration transmission unit 1712 holds a location registration algorithm 1712a for controlling location registration in the present embodiment.

  Each functional component of the UE 230 includes a part realized by hardware or a part realized by software by a CPU executing a program. 17 is an essential element in the present embodiment, and components corresponding to other functions of the UE 230 are not illustrated.

(Location registration algorithm)
FIG. 18 is a diagram showing the location registration algorithm 1712a. In FIG. 18, in each column, the right column is a column of information 1801 last registered by the UE stored in the location information storage unit 1713. The next middle column is a column of the notification information 1802 received by the UE notified from the notification information receiving unit 1711. The right column shows an operation 1803 taken by the location registration transmission unit 1712 of the UE of the present embodiment from the information 1801 last registered by the UE and the notification information 1802 received by the UE.

  The first row 1810 is an operation when the last location registration is under the macro BTS and the received broadcast information is also from the macro BTS, that is, when the last location registration is continuously under the macro BTS. The process is terminated without executing.At this time, if the position registration transmission timer is activated, the timer is stopped. " The second row 1820 is an operation when the last location registration is under the small BTS and the received broadcast information is also from the small BTS, that is, when the last location registration is still under the small BTS. Will end without processing. " The third line 1830 is an operation when the last location registration is under the macro BTS and the received broadcast information is from the small BTS, that is, when the macro BTS is moved into the small BTS. Send and update location information storage to sent location registration. " The last row 1840 is an operation when the last location registration is under the small BTS and the received broadcast information is from the macro BTS, that is, when the mobile terminal once enters the small BTS but comes out under the macro BTS. “The location registration transmission timer is started without immediate transmission of location registration. When the location registration transmission timer expires, the location registration transmission timer section starts to transmit the location registration and to the transmitted location registration. Update the location information storage section of “. If the received broadcast information is from the small BTS before the location registration transmission timer expires, the location is not registered because the condition changes to the second row 1820.

《UE processing procedure》
FIG. 19 is a flowchart showing a processing procedure of the UE according to the present embodiment. This flowchart is executed by the CPU that controls the UE 230 while using the RAM as a temporary storage, thereby realizing the processing of each functional component in FIG.

  First, in step S1910, it is determined whether the broadcast information is received from the macro BTS or the small BTS. If it is notification information, it will progress to step S1912 and will perform a location registration process according to the location registration algorithm shown in FIG. 18 (refer FIG. 20). In step S1920, it is determined whether a page signal is received from the macro BTS or the small BTS. If a page signal is received, it will progress to step S1922 and will perform a response process.

(Location registration processing procedure)
FIG. 20 is a flowchart showing the procedure of the location registration process (S1912). FIG. 20 is a flowchart for executing the location registration algorithm of FIG.

  First, in step S2001, it is determined whether the broadcast information received in step S1910 of FIG. 19 is from a small BTS or a macro BTS. If it is determined from the small BTS, the process proceeds to step S2003 to determine whether the final location registration stored in the position information storage unit 1713 has been transmitted to the small BTS / macro BTS. If the small BTS is the final location registration, the process returns without doing anything as shown in the second row 1820 of FIG. If the macro BTS is the final location registration, the process proceeds to step S2005, and as shown in the third row 1830 of FIG. 18, the macro BTS has moved from the subordinate of the macro BTS to the subordinate of the small BTS. Therefore, it is transmitted to the location registration server 240.

  In step S2007, it is determined whether the final location registration stored in the location information storage unit 1713 is transmitted to the small BTS / macro BTS when the received broadcast information is from the macro BTS. . If the macro BTS is the final location registration, the process proceeds to step S2017, where it is determined that the macro BTS has continued to be under the macro BTS as shown in the first row 1810 in FIG. 18, and the location registration transmission timer is reset without performing location registration. . If the small BTS is final position registration, the process of the last line 1840 in FIG. 18 is performed. First, in step S, a location registration transmission timer is started. In step S2011, it is determined whether there is broadcast information from the small BTS, and if there is broadcast information from the small BTS, the location registration is not performed assuming that the mobile phone has once gone out of the small cell but returned again.

  In step S2013, the time-out of the location registration transmission timer is monitored, and if time-out occurs without receiving the notification information from the small BTS, the processing proceeds to step S2015, and the location information of the large selmer created by the plurality of macro BTSs is stored in the location registration server 240. Send to.

[Third Embodiment]
In the second embodiment, when a UE leaves a small cell, a large cell formed by a plurality of macro BTSs is handled as one, and paging by the macro BTS is performed on the entire large location registration area. Therefore, after a call is performed immediately after moving from the small BTS to the macro BTS and the call to the small BTS fails, the call is performed for all the macro BTSs under the adjacent location registration area. However, after moving from the subordinate of the small BTS to the subordinate of the macro BTS, the time from the subordinate of the macro BTS to the location registration is limited to a certain time. Therefore, it can be inferred that it exists under the macro BTS around the small BTS, resulting in a waste of resources and an unnecessary load on the far macro BTS. In the present embodiment, a reserve location registration area consisting of a group of smaller macro cells is set in a large cell. According to this embodiment, in addition to the effects of the second embodiment, unnecessary waste of resources can be eliminated, and unnecessary load for a distant macro BTS can be reduced.

<< Configuration of Mobile Communication System According to this Embodiment >>
FIG. 21 is a block diagram showing a configuration of a mobile communication system 2100 according to this embodiment.

  21 is different from FIG. 2 in that the spare position registration areas A-1 and A-2 (2112) are newly created, and the position registration server 2140 is changed to control it. It is. Note that the location registration server 2140 differs from the location registration server 240 of FIG. 7 in that the location registration area, which is a large cell in the small BTS accommodation information storage unit, is further divided. Other constituent elements are the same as those of the second embodiment shown in FIG.

<< Configuration of Small BTS Accommodation Information Storage Unit of Location Registration Server >>
FIG. 22 is a diagram showing a configuration of the small BTS accommodation information storage unit 2214 of the location registration server 2140 according to the present embodiment.

  In FIG. 22, 2201 stores spare position registration areas A-1 and A-2 which are a part of a large cell constituted by a plurality of macro BTSs 210 in this example. Corresponding to the spare location registration areas A-1 and A-2, the small cells 2202 which are the location registration areas of the small BTSs included in the spare location registration areas A-1 and A-2 and the small cells are accommodated. Mobile terminal information 2203 to be registered is registered. The mobile terminal information 2203 accommodated in each small cell is notified from each small cell when the small cell is connected to the mobile communication system 2100, and is stored in association with the large cell including the small cell.

<< Processing procedure of call response waiting timer timeout processing according to this embodiment >>
FIG. 23 is a flowchart showing a processing procedure of the call response waiting timer timeout processing (S1040) according to the present embodiment. In order to realize the processing of the present embodiment, the flowchart of FIG. 23 may be executed instead of FIG. In FIG. 23, the steps with the same reference numbers as in FIG. 13 are the same as the processes in FIG.

  In FIG. 23, unlike step S1309 of FIG. 13, in step S2309, the macro BTS that instructs transmission of the Page signal is limited to the macro BTS that controls the reserve position registration area. As is clear from FIG. 22, the spare location registration area in which the page signal is transmitted is selected according to the condition adjacent to the small BTS in which the UE has been located so far.

[Fourth Embodiment]
In the second and third embodiments, attention is paid only to the movement from the small BTS to the macro BTS in the paging process. Therefore, the call to the macro BTS is executed only when the call to the small BTS fails. However, when the movement from the subordinate of the macro BTS to the subordinate of the small BTS and the call compete at the same timing, it may be assumed that the call to the macro BTS fails. Therefore, in this embodiment, when the call to the location registration area adjacent to the small BTS fails, the call to the small BTS is performed again. According to the present embodiment, even when movement from a macro BTS subordinate to a small BTS and a call compete at the same timing, it is possible to eliminate increase or decrease in processing load due to paging failure and failure. Note that the system configuration, device configuration, and the like of this embodiment can be assumed from the second and third embodiments, and a description thereof will be omitted.

<< Processing procedure of call response waiting timer timeout processing according to this embodiment >>
FIG. 24 is a flowchart showing the processing procedure of the call response waiting timer timeout processing (S1040) according to the present embodiment. In order to realize the processing of the present embodiment, the flowchart of FIG. 23 may be executed instead of FIG. In FIG. 23, the steps with the same reference numbers as in FIG. 13 are the same as the processes in FIG.

  In FIG. 24, when the paging by the macro BTS fails in step S1305, the paging process is not terminated. Next, in step S2401, Page signal transmission is performed only for the corresponding small BTS. In step S2403, the page response wait flag for small BTS is turned ON, and in step S2405, a response wait timer is started and the process returns.

  By adding such processing, even when the movement from the macro BTS subordinate to the small BTS and the call compete at the same timing, the paging failure is reduced and the load on the BTS and the network is reduced.

  In addition, the reduction of the location registration load according to the present embodiment depends on the frequency with which the UE moves between location registration areas and the time setting for suppressing location registration transmission after moving the macro BTS. The longer the suppression time (corresponding to the location registration transmission delay time 1714a), the greater the suppression effect of the location registration process. However, since it takes time to recognize the movement to the macro BTS, there is a small size where there is no UE. There is a high possibility that a call will be made to the BTS. The suppression time is set by estimating the time that can be assumed as the time to return to the cover area of the small BTS when it temporarily moves out of the cover area of the small BTS from the characteristics of the cover area of the small BTS. Thereby, an effect can be heightened.

[Other Embodiments]
As mentioned above, although embodiment of this invention was explained in full detail, the system or apparatus which combined the separate characteristic contained in each embodiment how was included in the category of this invention.

  Further, the present invention may be applied to a system constituted by a plurality of devices, or may be applied to a single device. Furthermore, the present invention can also be applied to a case where a control program that realizes the functions of the embodiments is supplied directly or remotely to a system or apparatus. Therefore, in order to realize the functions of the present invention with a computer, a control program installed in the computer, a medium storing the control program, and a WWW (World Wide Web) server for downloading the control program are also included in the scope of the present invention. include.

[Other expressions of embodiment]
A part or all of the above-described embodiment can be described as in the following supplementary notes, but is not limited thereto.

(Appendix 1)
A mobile communication system in which a plurality of cells having different sizes are superimposed,
A plurality of base stations that control mobile stations located in each of the plurality of cells;
A mobile station moving between the plurality of cells;
A location registration server for registering the location of the mobile station;
When the mobile station moves from a first cell of a first size to a second cell of a second size smaller than the first size included in the first cell, the mobile station notifies the location registration server, and When moving from two cells to the first cell, a delay of a predetermined time is performed before notifying the location registration server of the movement between cells, and the mobile station moves to the second cell during the delay of the predetermined time. A mobile communication system, comprising: location registration control means for controlling not to notify the location registration server of movement between cells when returning.
(Appendix 2)
The location registration server
Position registration means for registering the location of the mobile station;
Cell registration means for associating and registering the first cell, the second cell included in the first cell, and the mobile station accommodated in the second cell;
In response to the paging instruction to the target mobile station, for the second cell in which the area of the target mobile station is registered and the whole or a part of the first cell including the second cell Paging means for paging;
The mobile communication system according to supplementary note 1, wherein the mobile communication system includes:
(Appendix 3)
The paging means, after paging the second cell in which the area of the target mobile station is registered, when there is no response from the target mobile station for a predetermined time, The mobile communication system according to attachment 2, wherein paging is performed on the entire first cell to be included.
(Appendix 4)
The first cell includes a plurality of macro cells controlled by a plurality of macro radio base stations,
The paging means performs paging on the second cell in which the target mobile station is registered, and when there is no response from the target mobile station for a predetermined time, The mobile communication system according to appendix 2, wherein paging is performed on a group of macro cells adjacent to the second cell, which is a part and in which the area of the target mobile station is registered.
(Appendix 5)
The paging means performs the target movement again when there is no response from the target mobile station for a predetermined time after paging all or part of the first cell including the second cell. The mobile communication system according to any one of appendices 2 to 4, wherein paging is performed on the second cell in which the station location is registered.
(Appendix 6)
A mobile communication method in a mobile communication system in which a plurality of cells having different sizes are overlapped,
When the mobile station moves from the first cell of the first size to the second cell of the second size smaller than the first size included in the first cell, the movement between the cells is within the area of the mobile station When notifying the location registration server for registering the location and moving from the second cell to the first cell, a delay of a predetermined time is performed before notifying the location registration server of the movement between the cells. Controlling to not notify the location registration server of movement between cells if the mobile station returns to the second cell during a delay;
The location registration server registering the location of the mobile station;
The location registration server registers the first cell, the second cell included in the first cell, and the mobile station accommodated in the second cell in association with each other;
In response to a paging instruction to the target mobile station, the location registration server is configured to register the second cell in which the location of the target mobile station is registered and the entire first cell including the second cell or Paging against some, and
A mobile communication method comprising:
(Appendix 7)
A communication processing apparatus that moves between the plurality of cells in a mobile communication system in which a plurality of cells having different sizes are superimposed,
When moving from the first cell of the first size to the second cell of the second size smaller than the first size included in the first cell, the location of the communication processing device is registered for the movement between the cells. Notification means for notifying the location registration server
When moving from the second cell to the first cell, delay means for delaying a predetermined time before notifying the location registration server of movement between cells by the notification means;
Control means for controlling not to notify the location registration server of movement between cells if the communication processing device returns to the second cell during the delay of the predetermined time;
A communication processing apparatus comprising:
(Appendix 8)
In a mobile communication system in which a plurality of cells having different sizes are superimposed, a control method for a communication processing apparatus that moves between the plurality of cells,
When moving from the first cell of the first size to the second cell of the second size smaller than the first size included in the first cell, the location of the communication processing device is registered for the movement between the cells. A notification step for notifying the location registration server
When moving from the second cell to the first cell, a delay step of delaying a predetermined time before notifying the location registration server of the movement between cells by the notification step;
A control step of controlling not to notify the location registration server of movement between cells if the communication processing device returns to the second cell during the delay of the predetermined time;
A control method for a communication processing apparatus, comprising:
(Appendix 9)
A control program for a communication processing apparatus that moves between the plurality of cells in a mobile communication system in which a plurality of cells having different sizes are superimposed,
When moving from the first cell of the first size to the second cell of the second size smaller than the first size included in the first cell, the location of the communication processing device is registered for the movement between the cells. A notification step for notifying the location registration server
When moving from the second cell to the first cell, a delay step of delaying a predetermined time before notifying the location registration server of the movement between cells by the notification step;
A control step of controlling not to notify the location registration server of movement between cells if the communication processing device returns to the second cell during the delay of the predetermined time;
A control program for causing a computer to execute.
(Appendix 10)
In a mobile communication system in which a plurality of cells having different sizes are superimposed, a communication processing device for registering a location of a mobile station moving between the plurality of cells,
Position registration means for registering the location of the mobile station;
Cell registration means for associating and registering a first cell, a second cell included in the first cell, and a mobile station accommodated in the second cell;
In response to the paging instruction to the target mobile station, for the second cell in which the area of the target mobile station is registered and the whole or a part of the first cell including the second cell Paging means for paging;
A communication processing apparatus comprising:
(Appendix 11)
In a mobile communication system in which a plurality of cells having different sizes are overlapped, a control method for a communication processing apparatus for registering a location of a mobile station moving between the plurality of cells,
A location registration step of registering the location of the mobile station;
A cell registration step of registering the first cell, the second cell included in the first cell, and the mobile station accommodated in the second cell in association with each other;
In response to the paging instruction to the target mobile station, for the second cell in which the area of the target mobile station is registered and the whole or a part of the first cell including the second cell A paging step to page,
A control method for a communication processing apparatus, comprising:
(Appendix 12)
In a mobile communication system in which a plurality of cells having different sizes are superimposed, a control program for a communication processing apparatus for registering a location of a mobile station moving between the plurality of cells,
A location registration step of registering the location of the mobile station;
A cell registration step of registering the first cell, the second cell included in the first cell, and the mobile station accommodated in the second cell in association with each other;
In response to the paging instruction to the target mobile station, for the second cell in which the area of the target mobile station is registered and the whole or a part of the first cell including the second cell A paging step to page,
A control program for causing a computer to execute.

Claims (10)

A mobile communication system in which a plurality of cells having different sizes are superimposed,
A plurality of base stations that control mobile stations located in each of the plurality of cells;
A mobile station moving between the plurality of cells;
A location registration server for registering the location of the mobile station;
When the mobile station moves from a first cell of a first size to a second cell of a second size smaller than the first size included in the first cell, the mobile station notifies the location registration server, and When moving from two cells to the first cell, a delay of a predetermined time is performed before notifying the location registration server of the movement between cells, and the mobile station moves to the second cell during the delay of the predetermined time. A mobile communication system, comprising: location registration control means for controlling not to notify the location registration server of movement between cells when returning. The location registration server
Position registration means for registering the location of the mobile station;
Cell registration means for associating and registering the first cell, the second cell included in the first cell, and the mobile station accommodated in the second cell;
In response to the paging instruction to the target mobile station, for the second cell in which the area of the target mobile station is registered and the whole or a part of the first cell including the second cell Paging means for paging;
The mobile communication system according to claim 1, comprising:   The paging means, after paging the second cell in which the area of the target mobile station is registered, when there is no response from the target mobile station for a predetermined time, 3. The mobile communication system according to claim 2, wherein paging is performed on the whole of the first cell to be included. The first cell includes a plurality of macro cells controlled by a plurality of macro radio base stations,
The paging means performs paging on the second cell in which the target mobile station is registered, and when there is no response from the target mobile station for a predetermined time, 3. The mobile communication system according to claim 2, wherein paging is performed for a group of macro cells adjacent to the second cell, which is a part and where the target mobile station is registered.   The paging means performs the target movement again when there is no response from the target mobile station for a predetermined time after paging all or part of the first cell including the second cell. 5. The mobile communication system according to claim 2, wherein paging is performed on the second cell in which the location of the station is registered. A mobile communication method in a mobile communication system in which a plurality of cells having different sizes are overlapped,
When the mobile station moves from the first cell of the first size to the second cell of the second size smaller than the first size included in the first cell, the movement between the cells is within the area of the mobile station When notifying the location registration server for registering the location and moving from the second cell to the first cell, a delay of a predetermined time is performed before notifying the location registration server of the movement between the cells. Controlling to not notify the location registration server of movement between cells if the mobile station returns to the second cell during a delay;
The location registration server registering the location of the mobile station;
The location registration server registers the first cell, the second cell included in the first cell, and the mobile station accommodated in the second cell in association with each other;
In response to a paging instruction to the target mobile station, the location registration server is configured to register the second cell in which the location of the target mobile station is registered and the entire first cell including the second cell or Paging against some, and
A mobile communication method comprising: A communication processing apparatus that moves between the plurality of cells in a mobile communication system in which a plurality of cells having different sizes are superimposed,
When moving from the first cell of the first size to the second cell of the second size smaller than the first size included in the first cell, the location of the communication processing device is registered for the movement between the cells. Notification means for notifying the location registration server
When moving from the second cell to the first cell, delay means for delaying a predetermined time before notifying the location registration server of movement between cells by the notification means;
Control means for controlling not to notify the location registration server of movement between cells if the communication processing device returns to the second cell during the delay of the predetermined time;
A communication processing apparatus comprising: In a mobile communication system in which a plurality of cells having different sizes are superimposed, a control method for a communication processing apparatus that moves between the plurality of cells,
When moving from the first cell of the first size to the second cell of the second size smaller than the first size included in the first cell, the location of the communication processing device is registered for the movement between the cells. A notification step for notifying the location registration server
When moving from the second cell to the first cell, a delay step of delaying a predetermined time before notifying the location registration server of the movement between cells by the notification step;
A control step of controlling not to notify the location registration server of movement between cells if the communication processing device returns to the second cell during the delay of the predetermined time;
A control method for a communication processing apparatus, comprising: A control program for a communication processing apparatus that moves between the plurality of cells in a mobile communication system in which a plurality of cells having different sizes are superimposed,
When moving from the first cell of the first size to the second cell of the second size smaller than the first size included in the first cell, the location of the communication processing device is registered for the movement between the cells. A notification step for notifying the location registration server
When moving from the second cell to the first cell, a delay step of delaying a predetermined time before notifying the location registration server of the movement between cells by the notification step;
A control step of controlling not to notify the location registration server of movement between cells if the communication processing device returns to the second cell during the delay of the predetermined time;
A control program for causing a computer to execute. In a mobile communication system in which a plurality of cells having different sizes are superimposed, a communication processing device for registering a location of a mobile station moving between the plurality of cells,
Position registration means for registering the location of the mobile station;
Cell registration means for associating and registering a first cell, a second cell included in the first cell, and a mobile station accommodated in the second cell;
In response to the paging instruction to the target mobile station, for the second cell in which the area of the target mobile station is registered and the whole or a part of the first cell including the second cell Paging means for paging;
A communication processing apparatus comprising:

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