JP5010440B2 - Wireless terminal device, wireless terminal device program, and wireless base station control device - Google Patents

Description

  In the present invention, when a radio base station control device calls a radio terminal device via the radio base station device, in order to specify an area for calling the radio terminal device, information on the calling area of the radio terminal device is The present invention relates to a radio terminal apparatus that notifies a station control apparatus, a program for a radio terminal apparatus, and a radio base station control apparatus that is notified of call area information from the radio terminal apparatus.

  The wireless communication system includes a plurality of wireless base station devices controlled by the wireless base station control device, and the individual wireless base station devices and wireless terminal devices communicate with each other. A spatial range where one radio base station apparatus and a radio terminal apparatus can communicate is called a radio zone. When calling a certain wireless terminal device, the calling is performed in a wireless zone corresponding to a plurality of wireless base station devices as well as a wireless base station device corresponding to the wireless zone in which the wireless terminal device is located. A plurality of wireless zones in which this call is performed are collectively called a call area.

  When the wireless terminal device moves out of this calling area, the wireless terminal device calls via the wireless base station device that its own wireless terminal device exists in the calling area to which the newly communicating wireless base station device belongs. The information is registered by notifying the radio base station controller that manages the area.

  When the wireless terminal device moves near the boundary of this calling area, the calling area of this wireless terminal device changes frequently, so that the calling area is registered with the wireless base station control device each time (hereinafter referred to as “location registration”). write). For this reason, there has been a problem that a great load is imposed on the network or the radio base station control device connecting the radio base station control device and the radio base station device.

In order to solve the above problem, location registration is performed not only in a call area corresponding to a radio base station apparatus with which a radio terminal apparatus communicates, but also in a call area corresponding to a plurality of radio base station apparatuses capable of communicating across the call area. In addition, a technique for reducing the frequency of location registration by registering with a radio base station controller is known (Patent Document 1).
JP-A-5-122136

  However, in the above prior art, when the wireless terminal device moves to a place that is not near the boundary of the calling area after being registered in a plurality of calling areas held by the wireless base station control device, the position registration is also performed in the unnecessary calling area. However, since a call instruction is issued to an unnecessary radio base station apparatus, there is a problem that a new network load is generated.

  The present invention has been made to solve the above problems, and provides a radio terminal device, a program for a radio terminal device, and a radio base station control device that can reduce a load on a network or a radio base station control device. Objective.

In order to achieve the above object, a radio terminal apparatus according to the present invention is a radio terminal apparatus that communicates with a radio base station apparatus, and includes call area detection means for detecting call area information received from the radio base station apparatus. , A call area information holding means capable of holding a plurality of information of the calling area, and when the information of the calling area detected by the calling area detecting means is changed from the information of the calling area so far, A collating unit for collating whether or not the detected calling area information is held in the calling area information holding unit; and when the calling unit determines that the calling area information is not held by the checking unit, the calling area Information is additionally held in the calling area information holding means, and the additional holding is performed. The additional means for requesting the radio base station control apparatus to additionally hold the call area information via the radio base station apparatus, and a plurality of call area information is held by the call area information holding means. A first deletion unit that is activated when a predetermined time has elapsed and deletes the information of the calling area information holding unit except for the current calling area information, and the calling area information by the adding unit or the first deleting unit If you change the paging area information holding means, it is characterized by having a change request means for requesting to change the information of the paging area of the wireless base station controller is held in the radio base station controller.

A radio terminal apparatus program according to the present invention is a program used in a radio terminal apparatus that communicates with a radio base station apparatus, and includes a call area detection function that detects call area information received from the radio base station apparatus. It is possible to hold a plurality of information of the calling area detected by the calling area detection function, and when the detected information of the calling area is changed from the information of the calling area up to that point, it is newly detected. A collation function for collating whether or not information on the calling area is already held, and when it is determined by the collating function that information on the calling area is not held, information on the calling area is stored in the calling area information holding unit. In addition, the information on the additional held call area is stored in the An additional function for requesting the radio base station control apparatus to additionally hold via the line base station apparatus, and when the information on a plurality of calling areas is held by the additional function, a delete function for deleting the information of the paging area information holding function except information call area, when you change the holding state of the additional function or information paging area by the delete function, the radio base station controller holds And a change request function for requesting the radio base station controller to change the information of the calling area to be changed.

A radio base station control apparatus according to the present invention is provided in a radio communication system having a radio base station apparatus that exchanges information with a radio terminal apparatus, and controls the radio base station apparatus. a receiving means for receiving information about the paging area transmitted from the wireless terminal device, the information of the paging area included in the information received by the receiving means, to hold multiple in association with the wireless terminal device Holding means capable of changing the holding information of the holding means when the information received by the receiving means includes information of a request to change the information of the calling area, and the holding having a an instruction unit for instructing the call of the wireless terminal device to the radio base station apparatus based on the information of the calling area held by the means It is characterized in that.

  ADVANTAGE OF THE INVENTION According to this invention, the radio | wireless terminal apparatus, the program for radio | wireless terminal apparatuses, and a radio base station control apparatus which can reduce the load with respect to a network or a radio base station control apparatus can be provided.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram showing an embodiment of a wireless communication system in which wireless terminal apparatuses according to the present invention communicate. In this system, radio base station apparatuses CS11, CS12, CS13, CS21, CS22, and CS23 for radio terminal apparatuses PS1 to PS3 to communicate by radio are connected to the radio base station control apparatus 1 via a communication network 2. It is configured.

  In order for the radio terminal apparatus PS to receive a call, the radio base station control apparatus 1 connects an incoming call to the radio terminal apparatus PS via the communication network 2 and the radio base station apparatus CS. When the radio base station control device 1 calls this radio terminal device PS, it does not call only one radio base station device CS, but uses a plurality of radio base station devices CS as one call area PA. The station control device 1 calls for each calling area PA.

  In FIG. 1, the radio zones of the radio base station apparatuses CS11, CS12, and CS13 are shown as a call area PA1, and the radio zones of the radio base station apparatuses CS21, CS22, and CS23 are shown as a call area PA2.

FIG. 2 is a functional block diagram showing the configuration of the wireless terminal apparatus according to the present embodiment. The wireless terminal device PS includes an interface unit 10, a CPU 11, and a memory 12.
The interface unit 10 is provided with a calling area detection unit 10a (calling area detection means) that detects calling area information transmitted from the radio base station apparatus CS that is in communication.
The memory 12 holds currently held call area information 12a (call area information holding means).
The CPU 11 adds the call area PA detected by the call area detection unit 10a to the call area information 12a stored in the memory 12 and the call area information 12a. An adder 11d (addition means) to be held, a call area change request unit 11b (change request means) for requesting the radio base station controller 1 to change the call area, and call area information held in the memory 12 A timer 11c (first deletion means) is provided for determining the timing (predetermined time) for deleting the calling area information when there are a plurality of 12a.

  Information of a plurality of calling areas can be held in the calling area information 12a of the memory 12 provided in the wireless terminal device PS, and an example thereof is shown in FIG. In FIG. 3, (a) is an example in which two pieces of call area information 12a are held. (B) and (c) are examples in which one piece of call area information is held.

  FIG. 4 is a functional block diagram showing the configuration of the radio base station control apparatus according to the present embodiment. The radio base station control apparatus 1 includes an interface unit 110, a CPU 111, and a memory 112.

The interface unit 110 includes a call area information reception unit 110a (reception unit) that receives information on a call area (requested) transmitted from the radio terminal device PS via the radio base station device CS. .
The memory 112 holds call area management information 112a for managing and holding the wireless terminal device PS and call area information in association with each other (holding means).
The CPU 111 is provided with a calling area management information changing unit 111a (changing means) that changes the calling area management information 112a held in the memory 112 based on the information regarding the calling area received by the calling area information receiving unit 110a. Yes.

  In the call area management information 112a of the memory 112 provided in the radio base station control apparatus 1, information of a plurality of radio terminal apparatuses PS can be held as a call area management table for one call area information. As shown in FIG. That is, in the example of FIG. 5, four wireless terminal devices PS1, PS2, PS3, and PS4 are held for the calling area PA1, and three calling areas PS1, PS3, and PS5 are held for the calling area PA2. Has been.

  Next, referring to FIG. 6, the radio base station apparatus CS2 belonging to the call area PA2 moves from the state in which the radio base station apparatus CS1 and the radio terminal apparatus PS1 communicate with each other, and the radio base station apparatus CS2 belongs to the call area PA2. The flow of the entire system for registering the calling area PA in the radio base station control apparatus 1 by changing the communication will be described.

  First, when the wireless terminal device PS1 is turned on in an area where the wireless terminal device PS1 can communicate with the wireless base station device CS1 belonging to the calling area PA1 (S101), the wireless terminal device PS1 receives radio waves from the wireless base station device CS1 (S102). It detects that it is located in area PA1. The detected call area information PA1 is held in the call area information 12a as shown in FIG. Thereafter, the radio terminal apparatus PS1 notifies the radio base station control apparatus 1 via the radio base station apparatus CS1 that it is located in the calling area PA1 (S103, S104). The radio base station control device 1 that has received the notification registers the radio terminal device PS1 in the call area PA1 of the call area management table (FIG. 5) that it manages (S105).

  Thereafter, when the wireless terminal device PS1 moves to an area communicable with the wireless base station device CS2 belonging to the calling area PA2 and detects that the wireless terminal device PS1 is located in the calling area PA2, the calling area information 12a as shown in FIG. Is added and held (S106). At this time, the memory 12 holds two call area information PA1 and PA2.

  When the information held in the calling area information 12a in the memory 12 is changed, the wireless terminal device PS requests the wireless base station control device 1 to change the information in the calling area management table (FIG. 5) (S107, S108). This is because the calling area management information 112a corresponding to the wireless terminal device PS1 is held in the same information as the calling area information 12a held in the wireless terminal device PS1.

  The change request includes the call area information to be added or deleted in the information of the change request and adds or deletes the call area information, or changes all the call area information held by the wireless terminal device PS1. Either of the forms in which the call area management table is updated may be included in the request information.

  Receiving the change request, the radio base station control device 1 changes the call area management table (FIG. 5) managed by itself based on the change request. At this time, information on the wireless terminal device PS1 is held in both the call areas PA1 and PA2 in the call area management table (S110).

  Further, when the wireless terminal device PS1 makes a change request to the wireless base station control device 1, the wireless terminal device PS1 starts a timer 11c that determines the timing for changing the information of the calling area held in the calling area information 12a. (S109).

  Thereafter, when the wireless terminal device PS1 moves to the calling area PA1 (S111), the wireless terminal device PS1 detects that it is located in the calling area PA1. However, at this time, since the calling area information PA1 is already held in the calling area information 12a of the wireless terminal device PS1, the location registration to the wireless base station control device 1 is not performed. When the wireless terminal device PS1 moves to the calling area PA2 again (S112), the wireless terminal device PS1 detects that its own calling area PA1 has changed to the calling area PA2. However, at this time, since the calling area PA2 is already held in the calling area information 12a of the wireless terminal device PS1, the location registration to the wireless base station control device 1 is not performed.

  Thereafter, when the timer 11c of the wireless terminal device PS1 times out (S113), the wireless terminal device PS1 calls the information on the calling area held in the calling area information 12a, excluding the information on the calling area PA2 currently located. The information of area PA1 is deleted (S114).

  Since the wireless terminal device PS1 has changed the holding information of the calling area information 12a, the wireless terminal device PS1 thereafter requests the wireless base station control device 1 to change the information in the calling area management table (FIG. 5) (S115, S116). The radio base station apparatus 1 that has received this change request changes the call area management table that it manages based on the change request. At this time, information on the wireless terminal device PS1 held in the calling area management table is held only in the calling area PA2 (S117).

  Next, a processing flow of the wireless terminal device PS will be described with reference to FIG. First, when the power is turned on (F101), it is detected in which calling area PA the wireless terminal device PS is located (F102). When the calling area PA is detected, it is determined whether the calling area information is detected (F103). If detected, the calling area information is held in the memory 12. Thereafter, the wireless terminal device PS1 performs location registration with the wireless base station control device 1 (F104). If the calling area information is not detected in step F103, the process returns to step F102.

  After performing the location registration to the radio base station control device 1 in the procedure F104, the call area information is detected again (F105). When the calling area information is detected, it is determined whether the calling area information has changed (F106). When changed, the call area information already held in the call area information 12a is held, and the current call area information is added and held. Thereafter, the radio base station controller 1 is requested to change the current calling area information (F107). If there is no change in the calling area information in step F106, the process returns to step F105.

  When the additional registration is completed in step F107, a timer for determining the timing for changing the call area information held in the call area information 12a is started (F108).

  Then, the calling area where the wireless terminal device PS1 is located is detected (F109), and it is determined whether the calling area is the same as the calling area already held in the memory 12 (F110). If they are different, the call area information held in the call area information 12a the oldest is deleted, and the current call area information is added and held. Thereafter, the radio base station controller 1 is requested to change the calling area management table (F111). Thereafter, the process returns to step F108.

  If it is the same as the calling area already stored in the calling area information 12a in the procedure F110, it is determined whether or not the timer 11c has timed out (F112). When a time-out occurs, information on other calling areas is deleted by excluding the current calling area information from the calling area information 12a of the own wireless terminal device PS. As a result, the call area information 12a holds only information on the current call area. Thereafter, the radio base station control device 1 is requested to change the calling area management table (F113). Thereafter, the process returns to step F105. If the process has not timed out in step F112, the process returns to step F109.

  As described above, when a plurality of calling area information held by the wireless terminal device PS is held, the timer 11c is activated, and when a time-out occurs after a predetermined time elapses, the information on the current calling area is excluded. By deleting this call area information, it is possible to reduce the load on the network and the radio base station control device 1 due to many unnecessary calls.

  In the first embodiment, when there are a plurality of call area information held in the call area information 12a of the wireless terminal device PS, the current call area of the call area information 12a after a predetermined time has elapsed using a timer. It was configured to delete other call area information except for the information.

  However, if the setting of the timer is fixed to a certain time, information on other calling areas other than the information on the current calling area in the calling area information 12a may not be deleted. In other words, according to the first embodiment, the information on the other calling area is deleted when the timer times out even if both calling areas are frequently detected in the vicinity of the boundary between the two calling areas. Will be. After that, since it is necessary to add again by moving to the other calling area, a change request to the radio base station control apparatus 1 frequently occurs. Therefore, in the second embodiment, the wireless terminal device PS can determine by itself the appropriate timing for deleting the calling area information.

FIG. 8 is a functional block diagram showing the configuration of the wireless terminal apparatus according to the present embodiment. The wireless terminal device PS includes an interface unit 10, a CPU 11, and a memory 12.
The configuration of the interface unit 10 is the same as that shown in FIG.
In the memory 12, the currently held calling area information 12a (calling area information holding means) and the calling area history information 12b (change history information holding) that is a history in which the time when the calling area is detected is associated with the calling area information. Means).
The CPU 11 adds the call area PA detected by the call area detection unit 10a to the call area information 12a stored in the memory 12 and the call area information 12a. And an adder 11d (addition means) to be held, a call area change request unit 11b (change request means) for requesting the radio base station controller 1 to change the call area, and a call held in the call area information 12a When there is a plurality of area information, a deletion unit 11e that determines a trigger for deleting the calling area information and deletes information on other calling areas excluding the information on the current calling area in the calling area information 12a (second section) Deletion means).

  FIG. 9 shows a process in which the wireless terminal device PS learns and decides when the call area information held in the call area information 12a deletes information on other call areas excluding information on the current call area. It is a flowchart which shows a procedure. In addition, the wireless terminal device PS holds the call area history information 12b in the memory 12 so that the wireless terminal device PS learns and determines the deletion timing by itself. An example of the call area history information 12b is shown in FIG. The call area history information 12b is for holding the time when the call area information is detected and the detected call area information in association with each other.

  Next, a processing procedure of the wireless terminal device PS will be described with reference to FIG. However, steps F201 to F207 are the same as steps F101 to F107 of FIG.

  The procedure F208 sets the counter necessary for determining the trigger for deleting the information of other calling areas excluding the information of the current calling area from the calling area information held in the calling area information 12a to the initial value n = 0. To do. Next, position information is detected (F209), and it is determined whether or not it is the same as the call area information 12a already held (F210). If they are different, the oldest call area information held in the call area information 12a is deleted, and the current call area PA is added and held. Thereafter, the radio terminal device PS requests the radio base station control device 1 to change the calling area management table (F211).

  In the procedure F210, if the same as the call area information 12a already held, the call area history information 12b (FIG. 10) held in the memory 12 is referred to whether the call area information is the same as the call area information detected in the previous procedure F205. (F212). If the calling area information is different, n = 0 is substituted into the counter to initialize the counter, and the process returns to step F209. When the calling area information is the same, the counter is incremented by 1 (F213), and it is determined with reference to the calling area history information 12b held in the memory 12 whether or not the same calling area information is detected a predetermined number N times or more (see FIG. F214). If it is less than the predetermined number N times, the process returns to step F209. In step F214, if it is a predetermined number N times or more, it is detected that the user stays in the same calling area for a long time, and the wireless terminal device PS deletes other calling area information except the current calling area information. . Thereafter, the radio terminal device PS requests the radio base station control device 1 to change the calling area management table (F215). Thereafter, the process returns to procedure F205.

  When such a process is performed, while the wireless terminal device frequently goes around the boundary between the calling area PA1 and the calling area PA2 at the position PS2 in the system diagram of FIG. It is possible to lengthen the time until deleting the information of a plurality of calling areas, thereby reducing the frequent location registration. When the wireless terminal device moves to a position that is not near the boundary of the calling area such as the position of PS1 or PS3, it is detected that the staying time in the same calling area is long, and information on the current calling area is excluded. Since the information of other calling areas is deleted, the time for which the information of the wireless terminal device PS is held in the calling area where the calling area management information 112a is not necessary can be shortened.

  As described above, when the wireless terminal device PS holds a plurality of calling area information, the wireless terminal device PS refers to the calling area history information 12b and stores information on the plurality of calling areas held in the calling area information 12a. By autonomously determining the timing of deletion, the load on the network due to unnecessary calls can be further reduced.

  In the first and second embodiments, the number of registrations of the wireless terminal device PS in the call area information 12a held by the wireless terminal device PS and the calling area management table managed by the wireless base station control device 1 is two. Although only the case has been described, three or more may be used. In that case, it is possible to determine by referring to the call area history information 12b of the wireless terminal device PS in order to determine the timing for deleting the information of the plurality of call areas held in the call area information 12a. is there. For example, the call area of the call area history information 12b can be determined with reference to the time interval and frequency at which the call area is changed, and to which call area the call area is changed.

  In addition, this invention is not limited to the above structure, A various deformation | transformation is possible.

The figure of the mobile communication system which concerns on 1st embodiment of this invention. 1 is a functional block diagram showing a configuration of a wireless terminal device according to a first embodiment of the present invention. The table of the calling area information which the radio | wireless terminal apparatus which concerns on 1st embodiment of this invention hold | maintains. 1 is a functional block diagram of a configuration of a radio base station control device according to a first embodiment of the present invention. The table of the call area management information which the radio | wireless base station control apparatus which concerns on 1st embodiment of this invention hold | maintains. The sequence diagram of the mobile communication system which concerns on 1st embodiment of this invention. The flowchart which shows the process of the radio | wireless terminal apparatus which concerns on 1st embodiment of this invention. The functional block diagram of the structure of the radio | wireless terminal apparatus which concerns on 2nd embodiment of this invention. The flowchart which shows the process of the radio | wireless terminal apparatus which concerns on 2nd embodiment of this invention. The table of the call area history information which the radio | wireless terminal apparatus which concerns on 2nd embodiment of this invention hold | maintains.

Explanation of symbols

PA, PA1, PA2, PA3, PA4, PAn ... calling area, PS, PS1, PS2, PS3, PS4, PSm, PSn ... wireless terminal device, CS, CS1, CS2, CS11, CS12, CS13, CS21, CS22, CS23 DESCRIPTION OF SYMBOLS ... Wireless base station apparatus, 1 ... Wireless base station control apparatus, 2 ... Communication network, 10, 110 ... Interface part, 10a ... Call area detection part, 110a ... Call area information detection part, 11, 111 ... CPU, 11a ... Collation 111a ... calling area management information changing part, 11b ... calling area change requesting part, 11c ... timer, 11d ... adding part, 11e ... deleting part, 12, 112 ... memory, 12a ... calling area information, 112a ... calling area management Information, 12b ... Call area history information

Claims (5)

A wireless terminal device that communicates with a wireless base station device,
Call area detection means for detecting information of a call area received from the radio base station device;
Calling area information holding means capable of holding a plurality of information of the calling area;
Whether or not the information of the newly detected calling area is held in the calling area information holding means when the information of the calling area detected by the calling area detecting means is changed from the information of the calling area so far A matching means for matching
When it is determined by the collating means that the call area information is not held, the call area information is additionally held in the call area information holding means, and the additional held call area information is stored in the radio base station. Additional means for requesting the radio base station control device to additionally hold via the station device ;
First deletion means that is activated when information of a plurality of calling areas is held by the calling area information holding means, and that deletes the information of the calling area information holding means except for the current calling area information after a predetermined time has elapsed. When,
If you change the paging area information of the paging area information holding means by said addition means or the first deletion means, the radio base station controller to change the information of the paging area of the wireless base station controller holds And a change request means for requesting to the wireless terminal device. A wireless terminal device that communicates with a wireless base station device,
Call area detection means for detecting information of a call area received from the radio base station device;
Calling area information holding means capable of holding a plurality of information of the calling area;
Whether or not the information of the newly detected calling area is held in the calling area information holding means when the information of the calling area detected by the calling area detecting means is changed from the information of the calling area so far A matching means for matching
When it is determined by the collating means that the call area information is not held, the call area information is additionally held in the call area information holding means, and the additional held call area information is stored in the radio base station. Additional means for requesting the radio base station control device to additionally hold via the station device ;
Change history information holding means for holding call area information change history information when a change in the calling area is detected by the calling area detecting means and the matching means;
It is activated when information on a plurality of calling areas is held by the calling area information holding means, and when it is detected that the call area information holding means stays in the same calling area for a long time with reference to the change history information, A second deletion unit that determines a trigger to delete the information of the calling area information holding unit excluding the information of the area, and deletes the information of the calling area information holding unit except the information of the current calling area;
If you change the paging area information of the paging area information holding means by said addition means or said second deleting means, the radio base station controller to change the information of the paging area of the wireless base station controller holds And a change request means for requesting to the wireless terminal device. A program used in a wireless terminal device that communicates with a wireless base station device,
A call area detection function for detecting call area information received from the radio base station device;
It is possible to hold a plurality of information of the calling area detected by the calling area detection function, and when the detected information of the calling area changes from the information of the calling area so far, a newly detected calling area A collation function that collates whether or not the information is already stored,
When it is determined that the call area information is not held by the verification function, the call area information is additionally held in the call area information holding means, and the additional call area information is stored in the radio base station. An additional function for requesting the radio base station control device to additionally hold via the station device ;
A deletion function that is activated when information of a plurality of calling areas is held by the additional function, and that deletes the information of the calling area information holding function except for the information of the current calling area after a predetermined time, and
When you change the holding state of the additional function or information paging area by the delete function, change request function of requesting to change the information of the paging area of the wireless base station controller is held in the radio base station controller A program for a wireless terminal device, comprising: A program used in a wireless terminal device that communicates with a wireless base station device,
A call area detection function for detecting call area information received from the radio base station device;
It is possible to hold a plurality of information of the calling area detected by the calling area detection function, and when the detected information of the calling area changes from the information of the calling area so far, a newly detected calling area A collation function that collates whether or not the information is already stored,
When it is determined that the call area information is not held by the verification function, the call area information is additionally held in the call area information holding means, and the additional call area information is stored in the radio base station. An additional function for requesting the radio base station control device to additionally hold via the station device ;
A holding function that causes the change history information holding means of the wireless terminal device to hold change history information of information of a call area in which a call area is detected by the call area detection function;
It is activated when information of a plurality of calling areas is held by the additional function, and when it is detected that the user has stayed in the same calling area for a long time with reference to the change history information, information on the current calling area A delete function for deleting the information of the call area information holding function except for,
When you change the holding state of the additional function or information paging area by the delete function, change request function of requesting to change the information of the paging area of the wireless base station controller is held in the radio base station controller A program for a wireless terminal device, comprising: A radio base station control device that is provided in a radio communication system having a radio base station device that exchanges information with a radio terminal device and controls the radio base station device,
Receiving means for receiving information about a calling area sent from the wireless terminal device;
Holding means capable of holding a plurality of call area information included in the information received by the receiving means in association with the wireless terminal device;
Changing means for changing the holding information of the holding means when the information received by the receiving means includes information of a request to change the information of the calling area;
A radio base station control apparatus comprising: instruction means for instructing the radio base station apparatus to call a radio terminal apparatus based on information on a call area held in the holding means.

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