JP2013135279A - Radio base station and method for controlling radio base station - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve such a problem that, for setting addition to an access permission list in a base station controlling accessible mobile stations by the access permission list, it is necessary to set the addition from an access permission list setting device.SOLUTION: For setting addition to an access permission list, a state of a base station is temporarily shifted to a state in which any mobile station can register its location by an operation from an administrative mobile station which is already registered with the base station, and also collation is performed in a femto radio base station by an operation from the mobile station to be added to the access permission list.

Description

  The present invention relates to a radio base station and a radio base station control method, and more particularly to a radio base station with access restriction and a radio base station control method.

  In recent years, the introduction of ultra-small radio base stations (hereinafter referred to as femto radio base stations) having indoor coverage areas as radio base stations has been progressing. Since the femto radio base station is connected to the center station using a home broadband line as a relay network, it can be installed at low cost.

  In a conventional mobile communication system, when a mobile station enters the coverage area of a femto radio base station, handover processing and location registration processing occur, and an unspecified number of mobile stations can use the femto radio base station. .

  Therefore, as is known in Patent Document 1 to limit use by an unspecified number of mobile stations, the femto radio base station allows only specific users to use the femto radio base station. Access restriction function exists. A mode that operates without limiting users is called an open mode, and a mode that allows only a specific user is called a closed mode. Data describing a specific user who is permitted to use the femto radio base station is called an access permission list.

  By the way, FIG. 1 is used for a location registration method when an access permission list exists on a femto radio base station, taking the case of 3GPP2 (Third Generation Partnership Project 2) CDMA (Code Division Multiple Access) 2000 as an example. I will explain.

  In FIG. 1, the mobile station 100 transmits a Registration Message (location registration request) to the femto radio base station 200 (S501). The Registration Message includes mobile device subscriber identification information called IMSI (International Mobile Subscriber Identity).

  The femto radio base station 200 that has received the Registration Message determines whether or not to permit the location registration request of the mobile station 100 (S502). Here, the femto radio base station 200 transmits a Registration Accepted to the mobile station 100 on the assumption that the location registration request of the mobile station 100 is permitted (S503). When the femto radio base station 200 does not permit the location registration request of the mobile station 100, the femto radio base station 200 transmits a Registration Reject to the mobile station 100 in step 503.

  With reference to FIG. 2, a method for determining whether or not to permit a location registration request of a mobile station will be described. In FIG. 2, the femto radio base station 200 confirms whether the own station is set to the open mode or the closed mode (S601).

  If it is set in the open mode, the femto radio base station 200 notifies the information to the exchange 420 (S604). The femto radio base station 200 receives information from the exchange 420 (S605). The femto radio base station 200 confirms reception content confirmation (S606).

  When the information from the switching center 420 is also Accept, the femto radio base station 200 adds the information to the location registration list and transmits Accept to the mobile station 100 (S607). On the other hand, in the case of Reject, the femto radio base station 200 transmits a Reject to the mobile station 100 (S603).

  On the other hand, when the closed mode is set in Step 601, the femto radio base station 200 determines whether or not the IMSI of the mobile station is set in the access permission list (S602). When the determination is YES, the femto radio base station 200 transitions to step 604. When NO at step 602, the femto radio base station 200 transitions to step 603.

  The access permission list will be described with reference to FIG. In FIG. 3, the access permission list held by the femto radio base station 200 is composed of subscriber identification numbers for access permission. The femto radio base station 200 proceeds to the process of step 604 in FIG. 2 for the mobile station 100 whose subscriber identification number is in the access permission list. On the other hand, if the IMSI of the mobile station does not exist in the access permission list, the femto radio base station 200 transmits a reject to the mobile station 100 in step 603.

  When updating the access permission list existing in the femto radio base station 200, it is necessary to set the access permission list from the access permission list setting device connected via the femto GW by an operator's operation.

JP 2011-083005 A

  When the closed mode is set in the femto radio base station 200 placed in the radio wave insensitive zone, only registered users can talk and non-registered users cannot use the service. When a non-registered user who has visited the user's home where the femto radio base station 200 is installed uses the service of the femto radio base station 200, it is necessary to ask the operator to set the registered user from the access permission list setting device There is. Unregistered users cannot provide services until the procedure is completed.

  Further, when registering the access permission list, it is necessary to register with an IMSI having a subscriber identification number different from the mobile station telephone number. However, the IMSI cannot be known by a general user, and cannot be easily added to the access permission list existing on the femto radio base station by the operation of only the user.

  The present invention provides a femto radio base station 300 having a method of registering an accessible mobile station only by a user's operation for a femto radio base station 200 with access restriction that solves the above-described problems, and the function thereof. .

  The femto radio base station 300 has a function of shifting the femto radio base station 300 to the access permission list registration mode by an operation from the registered administrator mobile station 100-1. Here, the access permission list registration mode is a state of operating as an access permission even if a location registration request is received from any mobile station. Further, the operation is performed from the mobile station 100-2 to be added to the access permission list, and the femto radio base station 300 performs collation. Thereby, the registration operation by the operator's access permission list setting device is not required, and the registered user can be immediately added to the access permission list by the terminal operation from the user.

  The above-described problem is that a radio base station that restricts accessible mobile stations based on the access permission list shifts to a mode in which a mobile station is added to the access permission list by an operation from a specific mobile station, and moves to be added When a location registration request is received from a station, it is added to the location registration list. When an access permission request is received from a mobile station to be added, this can be achieved by the radio base station that registers the mobile station to be added to the access permission list.

  Further, in the control method in the radio base station that restricts accessible mobile stations based on the access permission list, a step of transitioning to a mode for adding a mobile station to the access permission list by an operation from a specific mobile station, and addition Adding a location registration request from the mobile station to be added to the location registration list, and receiving an access permission request from the mobile station to be added to register the mobile station to be added to the access permission list. This can be achieved by the control method of the radio base station.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to use the service of a femto radio base station with respect to the unregistered user who visited the user's house by user's terminal operation.

It is a sequence diagram explaining the location registration of a CDMA2000 1x system. It is a flowchart of the position registration process of a femto radio base station. It is a figure explaining an access permission list. It is a block diagram explaining the structure of a femtocell system. It is a block diagram explaining the structure of a femto base station. It is a block diagram of a location registration control unit. It is a figure explaining an access permission list table. It is a state transition diagram of a femto radio base station. It is a sequence diagram until it reaches access permission. It is a flowchart explaining a process when there is transmission operation in closed mode. It is a flowchart explaining a process when there exists transmission operation in access permission list addition mode. It is a flowchart explaining a process when the access permission list change mode ends or the access permission list change mode is entered and a certain time elapses.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings using examples. Note that the same reference numerals are assigned to substantially the same parts and the description will not be repeated. The configuration of the wireless communication system will be described with reference to FIG. In FIG. 4, the radio communication system 500 includes a mobile station 100, a femto radio base station 300, and a center station 400. The center station 400 includes a femto GW 410, a switching center (MSC) 420, and an access permission list setting device 430. The mobile station 100-1 is a management mobile station for the femto radio base station 300. The mobile station 100-2 is a mobile station that is not registered in the access list.

The IMSI of the mobile station 100-1 is AAAAAAAAAAA. The IMSI of the mobile station 100-2 is CCCCCCCCCC. The IMSI of the mobile station 100-2 is not registered in the access permission list of FIG.
A plurality of switching center MSCs 420 may exist and may be connected to each other, but only one is shown and simplified for convenience of explanation.

  The configuration of the femto radio base station will be described with reference to FIG. In FIG. 5, the femto radio base station 300 includes an antenna unit 310, a reception unit 320, a transmission unit 330, a communication control unit 340, a base station information management unit 350, a location registration control unit 360, and a location registration list. A management unit 370, an access permission list management unit 380, and a wired communication unit 390 are configured.

  The antenna unit 310 transmits a radio signal output from the transmission unit 330. The antenna unit 310 also receives a radio signal and outputs it to the receiving unit 320. The receiving unit 320 reads data from the received signal and outputs it to the communication control unit 340. The transmission unit 330 converts the data from the communication control unit 340 into a radio signal and outputs it to the antenna unit 310. The communication control unit 340 performs communication control. The base station information management unit 350 manages base station parameters such as the open mode, the closed mode state, and the transmission power. The location registration control unit 360 controls location registration determination based on the location registration signal of the mobile station 100 received via the communication control unit 340, the data of the location registration list management unit, and the data of the access permission list management unit. The location registration list management unit 370 manages data of mobile terminals whose locations are registered on the femto radio base station. The access permission list management unit 380 manages data of mobile terminals and administrator mobile terminals that are allowed access during the closed mode. The wired communication unit 390 is an interface with a wired line.

  With reference to FIG. 6, the configuration of the location registration control unit that determines access permission will be described. In FIG. 6, the location registration control unit 360 includes a location registration request receiving unit 361, a location registration processing unit 362, an exchange interface 363, and a location registration response transmitting unit 364.

  The location registration request receiving unit 361 receives a location registration request. The location registration processing unit 362 refers to the access permission list management unit 380 and determines location registration. The location registration processing unit 362 accesses the location registration list management unit 370 and registers the mobile station 100 that has accepted location registration in the location registration list. The switching center interface 363 is an interface with the switching center. The location registration response transmission unit 364 transmits an Accept or Reject response.

  The access permission list table of the access permission list management unit 380 will be described with reference to FIG. In FIG. 7, the access permission list in which mobile stations that permit location registration in the closed mode are registered is the access permission IMSI, the administrator flag indicating the administrator mobile station, and the access permission list when it is added to the access permission list. Has an expiration date that exists on the access list. In the access permission list, at least one administrator mobile station needs to be registered in advance by the operator. Here, the mobile station 100-1 is an administrator mobile station registered in advance.

  The state transition of the femto radio base station will be described with reference to FIG. In FIG. 8, the femto radio base station 300 includes a closed mode and an access permission list addition mode. This state transition is caused by a command for state transition from the administrator mobile station 100-1 or a transmission operation for a specific number.

  With reference to FIG. 9, an operation for registering a mobile station whose location is not registered in the femto radio base station in the access permission list will be described. In FIG. 9, the administrator mobile station 100-1 performs a call operation including the number that the femto radio base station 300 recognizes in advance as the access permission list registration work and the password that follows it (S101). The femto radio base station 300 confirms whether it is an access permission list addition operation, and transitions to the access permission list registration mode (S102). The mobile station 100-2 enters the cell search operation of the radio base station by a user operation. The mobile station 100-2 detects the femto radio base station 300 and transmits a location registration request to the femto radio base station 300 (S103). This location registration request includes the IMSI of the mobile station.

  Receiving the location registration request, the femto radio base station 300 transmits an authentication request to the switching center 420 (S104). The exchange 420 performs an authentication operation. In this case, since authentication is OK, the exchange 420 transmits a location registration Accept response to the femto radio base station 300 (S106). The femto radio base station 300 adds to the location registration list (S107). The femto radio base station 300 transmits a location registration permission response to the mobile station 100-2 (S108).

  By the operation on the user side, the mobile station 100-2 allows the femto radio base station 300 to recognize the access permission list registration work and the password included in the outgoing call from the administrator mobile station 100-1. A calling operation is performed using the number (109). The femto radio base station 300 performs authentication based on the code number included in step 102 and the code number in step 109, and sets the expiration date that sets the IMSI of the mobile station and one day later in the access permission list. Perform (S110). The femto radio base station 300 transmits an ACK of normal termination to the mobile station 100-2 (S111).

  When a certain period has elapsed since the start of the access permission list registration mode, the femto radio base station 300 ends the access permission list change mode and enters the closed mode (S112). It should be noted that the closed mode can also be returned by inputting a command from the administrator mobile station 100-1 or making a specific number transmission operation.

  With the above operation, the addition work to the access permission list is completed, and the terminal to be registered can be registered in the access permission list. It should be noted that the expiration date of the user in the added access permission list can be updated when there is a call operation from the mobile station or a location registration continuation request from the terminal periodically. The femto radio base station 300 deletes the mobile station in the access permission list that has expired.

  With reference to FIG. 10, an operation when the femto radio base station performs a transmission operation while in the closed mode will be described. This flow is started when the femto radio base station 300 receives a call operation during the closed mode. In FIG. 10, when it is a transmission operation from a mobile station, the femto radio base station 300 determines whether the mobile station is an administrator mobile station (S201). If the mobile station is not the administrator mobile station (NO), the femto radio base station 300 continues the normal call operation (S204).

  If the mobile station is an administrator mobile station in step 201 (YES), the femto radio base station 300 determines whether the destination number is an access permission list registration work number (S202). If it is not the access permission list registration work number, the femto radio base station 300 continues normal transmission processing. On the other hand, in the case of the number including the access permission list registration work, the femto radio base station 300 stores the personal identification number and transitions to the access permission list addition mode (S203).

  With reference to FIG. 11, the operation when the femto radio base station accepts a call operation during the access permission list registration mode will be described. In FIG. 11, when there is a call operation during the access permission list addition mode, the femto radio base station 300 determines whether or not the caller mobile station is a mobile station registered in the access permission list (S301). If the mobile station is registered in the access permission list (YES), the normal call operation is continued (S302).

  If it is determined in step 301 that the terminal is not registered in the access permission list (NO), the femto radio base station 300 determines a call destination number and a password (S303). In step 303, the femto radio base station 300 matches the personal identification number inserted when the destination number is the access permission list addition number and the administrator mobile station 100-1 changes to the access permission list addition mode. Judgment is made.

  In the case of NO in step 303, since the mobile station is not a terminal that adds to the access permission list, the femto radio base station 300 performs a call operation reject and a location registration unregister (S304). If the determination in step 303 is YES, the IMSI of the mobile station is registered in the access permission list (S305).

  The femto radio base station 300 in the access permission list addition mode is in a state where any terminal accepts location registration. For this reason, when location registration of an unintended mobile station occurs and no transmission operation is performed, location registration remains in the femto radio base station, which is not convenient.

  A terminal that wishes to be registered during a certain period of time, such as 3 minutes, when there is a call including a state transition number from the administrator mobile station, and the administrator mobile station has changed to the access permission list in the access permission list. If there is no location registration or transmission operation from, the femto radio base station 300 needs to cancel the mobile station where unnecessary location registration has occurred.

  With reference to FIG. 12, the flow of the femto radio base station when the access permission list change mode ends or when the access permission list change mode ends and a certain time elapses will be described. In FIG. 12, the femto radio base station 300 changes to the closed mode (S401). As a result, the femto radio base station 300 does not permit location registration even if there is a location registration request from a mobile station other than those in the access permission list when a new location registration occurs.

  The femto radio base station 300 checks whether the mobile station has a location registration but does not exist in the access permission list (S402). When there is a mobile station, the femto radio base station 300 performs an operation for deleting the location registration of the mobile station (S403). If it does not exist, the femto radio base station 300 ends as it is.

  According to the present embodiment, the service of the femto radio base station can be used for a non-registered user who has visited the user's home by the user's terminal operation.

  DESCRIPTION OF SYMBOLS 100 ... Mobile station, 200 ... Femto radio base station, 300 ... Femto radio base station, 310 ... Antenna part, 320 ... Reception part, 330 ... Transmission part, 340 ... Communication control part, 350 ... Base station information management part, 360 ... Location registration control unit, 361 ... location registration request receiving unit, 362 ... location registration processing unit, 363 ... switching center interface, 364 ... location registration response transmission unit, 370 ... location record list management unit, 380 ... access permission list management unit, 390 ... Wired communication unit, 400 ... Center station, 410 ... Femto GW, 420 ... Switching station (MSC), 430 ... Access permission setting device, 500 ... Wireless communication system.

Claims (4)

In a radio base station that restricts accessible mobile stations based on an access permission list,
Transition to a mode for adding a mobile station to the access permission list by an operation from a specific mobile station. When a location registration request is received from a mobile station to be added, the mobile station is added to the location registration list and accessed from the mobile station to be added. A radio base station that registers the mobile station to be added to the access permission list when a permission request is received. In the radio base station according to claim 1,
A radio base station that transmits an authentication request to an exchange when a location registration request is received from a mobile station to be added. In the radio base station according to claim 1 or 2,
The mode for adding a mobile station to the access permission list is changed to a normal mode by a timer. In a control method in a radio base station that restricts accessible mobile stations based on an access permission list,
Transition to a mode of adding a mobile station to the access permission list by an operation from a specific mobile station;
When receiving a location registration request from the mobile station to be added, adding to the location registration list;
And registering the mobile station to be added to the access permission list when an access permission request is received from the mobile station to be added.

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