JP2022003719A - Call processing control device, tracking area list provision method, and program - Google Patents

Abstract

To make it possible to provide a tracking area list for a terminal according to its mobility characteristics.SOLUTION: Area number acquisition means 12 refers to history information storage means 11 to acquire the number of tracking areas in which a terminal has been present within a predetermined time. Determination means 13 determines whether the number of acquired tracking areas is greater than or equal to a threshold value. List generating means 14 generates a first tracking area list on the basis of the tracking areas stored in the history information storage means 11 when the number of tracking areas is determined to be less than or equal to the threshold value. Transmission means 15 transmits a first tracking area list to the terminal when the number of tracking areas is determined to be less than or equal to the threshold value. The transmission method 15 transmits a second tracking area list to the terminal when the number of tracking areas is determined to be more than the threshold value.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a call processing control device, a tracking area list providing method, and a program.

The MME (Mobility Management Entity) accommodates a base station (eNode B: evolved Node B) and performs terminal movement management and authentication (security control). The MME manages the position of the terminal by using a position registration area called a tracking area (TA). The tracking area is identified by using an identifier called TAI (Tracking Area Identifier). The MME provides a TAI list (tracking area list) including a plurality of TAIs to the terminal. The TAI list of the terminal is updated at the time of the initial connection process and the location registration process (TAU: Tracking Area Update).

Here, when the TA list is statically assigned to the terminal in the MME, there is a possibility that the TA list including the TAI of the TA not in the service area is provided to a certain terminal. In that case, there is a possibility that the area for transmitting the paging signal from the MME to the eNodeB or the terminal is wasted. In addition, unnecessary location registration may occur in the terminal.

To solve the above problem, Patent Document 1 discloses a wireless communication system that recognizes a movement pattern of a mobile device (terminal) and assigns a TAI list according to the movement pattern to the mobile device. In the wireless communication system described in Patent Document 1, the call processing control device selects the TAI of the area along the moving area of each mobile device as the TAI list. By doing so, the call processing control device can make a paging request to the base station on the movement pattern of the mobile device. In addition, it is possible to suppress the occurrence of unnecessary position registration in the mobile device.

Japanese Unexamined Patent Publication No. 2010-245714

However, in Patent Document 1, the wide range of movement of the mobile device is not taken into consideration. When the TAI of the area along the moving area is selected as the TAI list for the mobile machine having a wide moving range, there is a concern that the number of TAI straddles will increase and the frequency of the location registration process will increase.

In view of the above circumstances, an object of the present disclosure is to provide a call processing control device, a tracking area list providing method, and a program capable of providing a tracking area list according to a movement characteristic to a terminal.

In order to achieve the above object, the present disclosure refers to a tracking area in which a terminal exists, a history information storage means for storing time information, and the history information storage means, and the terminal exists within a predetermined time. A determination that determines whether or not the number of tracking areas is equal to or less than the threshold value by comparing the number of acquired tracking areas and the threshold value with the area number acquisition means for acquiring the number of tracking areas. The means, the list generation means for generating the first tracking area list based on the tracking area stored in the history information storage means, and the number of the tracking areas when the number of the tracking areas is equal to or less than the threshold value. Is equal to or less than the threshold value, the first tracking area list is transmitted to the terminal, and when the number of the tracking areas is larger than the threshold value, the second tracking area determined according to the tracking area in which the terminal is present. Provided is a call processing control device including a transmission means for transmitting the tracking area list of the above to the terminal.

The present disclosure stores the tracking area in which the terminal exists and the time information, acquires the number of tracking areas in which the terminal exists within a predetermined time, and obtains the number of acquired tracking areas and the threshold value. When the number of the tracking areas is equal to or less than the threshold value, a first tracking area list is generated based on the stored tracking area, and the number of the tracking areas is equal to or less than the threshold value. In this case, the first tracking area list is transmitted to the terminal, and when the number of the tracking areas is larger than the threshold value, the second tracking area list determined according to the tracking area in which the terminal exists is transmitted to the terminal. Provides a method of providing a tracking area list to be sent to.

In the present disclosure, the tracking area in which the terminal exists and the time information are stored in the network device, the number of tracking areas in which the terminal exists within a predetermined time is acquired, and the number of the acquired tracking areas is used. , When the number of the tracking areas is equal to or less than the threshold value, a first tracking area list is generated based on the stored tracking area, and the number of the tracking areas is the above-mentioned. If it is equal to or less than the threshold value, the first tracking area list is transmitted to the terminal, and if the number of the tracking areas is larger than the threshold value, the second tracking area determined according to the tracking area in which the terminal exists. A program for executing a process of transmitting a list to the terminal is provided.

The call processing control device, the tracking area list providing method, and the program according to the present disclosure can provide the terminal with the tracking area list according to the movement characteristics.

The block diagram schematically showing the call processing control apparatus which concerns on this disclosure. The block diagram which shows the communication system which includes the call processing control apparatus which concerns on one Embodiment of this disclosure. The block diagram which shows the configuration example of MME. The figure which shows an example of a static TAI list. The flowchart which shows the operation procedure of MME. The figure which shows the movement route of a terminal. The figure which shows the example of the information which is stored in the history information storage part. The figure which shows the example of the information which is stored in the history information storage part. The figure which shows the example of the information which is stored in the history information storage part. The figure which shows the example of the dynamic TAI list sent to the terminal. The figure which shows the other example of the information stored in the history information storage part. The figure which shows the other example of the information stored in the history information storage part. A block diagram showing a configuration example of a network device.

Prior to the description of the embodiments of the present disclosure, the outline of the present disclosure will be described. FIG. 1 schematically shows a call processing control device according to the present disclosure. The call processing control device 10 includes a history information storage unit 11, an area number acquisition unit 12, a determination unit 13, a list generation unit 14, and a transmission unit 15. The history information storage means 11 stores the tracking area in which the terminal exists and the time information. The area number acquisition means 12 refers to the history information storage means 11 and acquires the number of tracking areas in which the terminal was present within a predetermined time.

The determination means 13 compares the number of acquired tracking areas with the threshold value. The determination means 13 determines whether or not the number of acquired tracking areas is equal to or greater than the threshold value. When the number of tracking areas is determined to be equal to or less than the threshold value, the list generation means 14 generates a first tracking area list based on the tracking areas stored in the history information storage means 11.

When the transmission means 15 determines that the number of tracking areas is equal to or less than the threshold value, the transmission means 15 transmits the first tracking area list to the terminal. When it is determined that the number of tracking areas is larger than the threshold value, the transmission means 15 transmits a second tracking area list determined according to the tracking area in which the terminal exists to the terminal.

In the present disclosure, the determination means 13 determines whether or not the number of tracking areas stored in the history information storage means 11 within a predetermined time is equal to or greater than the threshold value. When the transmission means 15 determines that the number of tracking areas is equal to or greater than the threshold value, the transmission means 15 transmits a first tracking area list generated based on the tracking area stored in the history information storage means 11 to the terminal. .. When it is determined that the number of tracking areas is larger than the threshold value, the transmission means 15 transmits a second tracking area list determined according to the tracking area in which the terminal exists to the terminal. The present disclosure can provide a terminal with a tracking area list according to its movement characteristics by changing the tracking area list transmitted to the terminal according to the number of tracking areas.

Hereinafter, embodiments of the present disclosure will be described in detail. FIG. 2 shows a communication system including a call processing control device according to an embodiment of the present disclosure. In the present embodiment, the communication system 100 is configured as, for example, a mobile communication system defined in 3GPP (3rd Generation Partnership Project). The communication system 100 includes a terminal 101, a base station 102, an MME 103, an SGW (Serving Gateway) 104, and a PGW (Packet data network Gateway) 105. In the communication system 100, the MME 103, the SGW 104, and the PGW 105 are arranged in the core network (EPC: Evolved Packet Core).

The terminal 101 is a communication device defined as a mobile terminal device in 3GPP. The terminal 101 is configured as a mobile phone, a smartphone, a tablet terminal, a computer device having a communication function, or the like. The base station 102 is a node device defined as a base station in 3GPP. The base station 102 forms a wireless communication area and performs wireless communication with a terminal 101 located in the wireless communication area managed by the own device.

The PGW 105 is a node device located at the boundary between the mobile communication system and the external network. The PGW 105 transmits the data transmitted from the external network to the node device in the mobile communication system. The PGW 105 sets a communication bearer with the SGW 104. The PGW 105 transmits the data transmitted from the external network to the SGW 104 via the communication bearer.

When the SGW 104 is notified of the incoming packet to the terminal 101, the SGW 104 notifies the MME 103 of the incoming message. Further, the SGW 104 transmits data destined for the terminal 101 to the base station 102 that communicates with the terminal 101.

The MME 103 defines a position registration area (tracking area) for managing the position of the terminal 101. The MME 103 manages the position where the terminal 101 exists by using the tracking area identifier (TAI). Each tracking area may consist of a plurality of base station groups. In other words, each tracking area may include a plurality of radio communication areas formed by the plurality of base stations 102. The MME 103 provides the terminal 101 with a tracking area list (TAI list) including one or more tracking area identifiers (TAIs). When there is an incoming call to the terminal 101, the MME 103 sends a page message for the incoming call to an area included in the TAI list.

The terminal 101 holds the TAI list provided by the MME 103. When the terminal 101 moves to a tracking area not included in the TAI list, the terminal 101 executes a TAU procedure and sends a location registration request message to the MME 103. Upon receiving the location registration request message, the MME 103 registers the location of the terminal 101. The MME 103 corresponds to the call processing control device 10 shown in FIG.

FIG. 3 shows a configuration example of the MME 103. The MME 103 includes a history information storage unit 131, a TAI number acquisition unit 132, a determination unit 133, a dynamic TAI list generation unit 134, a static TAI list holding unit 135, and a TAI list transmission unit 136.

The history information storage unit 131 includes a storage device, and for each terminal 101 (see FIG. 2), the identifier (TAI) of the tracking area in which the terminal exists (exists) and the time information (time stamp) are stored. Remember. The history information storage unit 131 receives, for example, a TAI notification S1AP (S1 Application Protocol) signal (for example, S1AP_Initial UE Message) by executing an Attach procedure or a TAU procedure. The history information storage unit 131 stores the TAI included in the received signal together with the type stunt. The history information storage unit 131 corresponds to the history information storage means 11 shown in FIG.

The TAI number acquisition unit 132 refers to the history information storage unit 131 and acquires the number of TAIs within a predetermined time. For example, when the TAU procedure is executed, the TAI number acquisition unit 132 refers to the history information storage unit 131 and acquires the number of TAIs within a predetermined time from the time when the TAU procedure is executed. The TAI number acquisition unit 132 corresponds to the area number acquisition means 12 shown in FIG.

The determination unit 133 compares the number of TAIs acquired by the TAI number acquisition unit 132 with a predetermined threshold value. The determination unit 133 determines whether or not the number of TAIs is equal to or less than the threshold value. The threshold indicates, for example, the maximum number of TAIs that can be included in the TA list. The determination unit 133 corresponds to the determination means 13 shown in FIG.

When the determination unit 133 determines that the number of TAIs is equal to or less than the threshold value, the dynamic TAI list generation unit 134 refers to the history information storage unit 131 and makes a TAI list for the terminal 101 on which the TAU procedure is executed (No. 1). 1 Tracking area list; hereinafter also referred to as a dynamic TAI list) is generated. The dynamic TAI list generation unit 134 uses, for example, a dynamic TAI list for a TAI list including the latest "maximum number of TAIs that can be included in the TA list" among the TAIs stored in the history information storage unit 131. Generate as. The dynamic TAI list generation unit 134 does not generate the dynamic TAI list when the determination unit 133 determines that the number of TAIs is larger than the threshold value. The dynamic TAI list generation unit 134 corresponds to the list generation means 14 shown in FIG.

The static TAI list holding unit (tracking area list holding means) 135 includes a storage device and stores a plurality of TAI lists (second tracking area list, hereinafter also referred to as static TAI list) managed by the MME 103. do. FIG. 4 shows an example of a static TAI list. In FIG. 4, for example, the static TAI list 201 includes TAI # 1, # 5, # 6, # 7, # 12, # 26, # 60, # 2044, and # 2045. The static TAI list 202 includes TAI # 11, # 16, # 17, # 18, # 110, and # 118. The static TAI list 203 includes TAI # 2, # 3, # 8, # 9, # 20, and # 100. The static TAI list 204 includes TAI # 10, # 15, # 19, and # 120.

The TAI list transmission unit 136 transmits the dynamic TAI list generated by the dynamic TAI list generation unit 134 or the static TAI list held by the static TAI list holding unit 135 to the terminal 101. When the determination unit 133 determines that the number of TAIs is equal to or less than the threshold value, the TAI list transmission unit 136 transmits the dynamic TAI list to the terminal 101. When the determination unit 133 determines that the number of TAIs is greater than the threshold value, the TAI list transmission unit 136 acquires a static TAI list including the TAI in which the terminal 101 is present from the static TAI list holding unit 135. .. The TAI list transmission unit 136 transmits the acquired static TAI list to the terminal 101.

The TAI list transmission unit 136 may transmit the static TAI list to the terminal 101 until a predetermined time elapses after the registration of a new subscriber by the first Attach procedure or the TAU procedure. In that case, the TAI number acquisition unit 132 does not have to acquire the TAI number. The TAI list transmission unit 136 corresponds to the transmission means 15 shown in FIG.

Next, the operation procedure will be described. FIG. 5 shows an operation procedure (tracking area list providing method) of the MME 103. When the Attach procedure or the TAU procedure is executed in the terminal 101, the history information storage unit 131 acquires the TAI in which the terminal 101 is located via the base station 102 (see FIG. 2) (step S1). The history information storage unit 131 acquires TAI from, for example, S1AP_Initial UE Message. The history information storage unit 131 stores the acquired TAI and the time stamp (step S2).

The TAI number acquisition unit 132 determines whether or not a certain time has elapsed after the registration of a new subscriber for the terminal 101 that has performed the Attach procedure or the TAU procedure (step S3). When the TAI number acquisition unit 132 determines that a certain time has elapsed, it acquires the number of TAIs stored in the history information storage unit 131 within a predetermined time (step S4). For example, in step S4, the TAI number acquisition unit 132 acquires the number of TAIs whose time stamp indicates the time for the past predetermined time.

The determination unit 133 determines whether or not the number of acquired TAIs is equal to or less than a predetermined threshold value (step S5). When the number of TAIs is determined to be equal to or less than the threshold value in step S5, the dynamic TAI list generation unit 134 generates a dynamic TAI list based on the history of TAI stored in the history information storage unit 131 ( Step S6). The TAI list transmission unit 136 transmits the dynamic TAI list generated in step S6 to the terminal 101 that has executed the Attach procedure or the TAU procedure (step S7).

When the TAI list transmission unit 136 determines in step S5 that the number of TAIs is greater than the threshold value, the TAI list transmission unit 136 acquires a static TAI list from the static TAI list holding unit 135 (step S8). Even if it is determined in step S3 that a certain time has not passed since the new subscriber registration, the process proceeds to step S8 and the static TAI list is acquired. The TAI list transmission unit 136 transmits the acquired static TAI list to the terminal 101 that has executed the Attach procedure or the TAU procedure (step S9).

Hereinafter, the above operation will be described with reference to specific examples. FIG. 6 shows the movement route of the terminal 101. In the following, as shown in FIG. 6, the terminal 101 performs new subscriber registration at TAI # 5, and then TAI # 6, # 7, # 12, # 11, # 18, # 10, # 3, And # 2 shall be moved in this order. It is assumed that the static TAI list is similar to the example of FIG.

FIG. 7-9 shows an example of information stored in the history information storage unit 131. As shown in FIG. 7, the history information storage unit 131 stores the TAI “5” for which new subscriber registration has been performed and the time stamp “2020/1/1 6:00” in association with each other. The terminal 101 then implements the TAU procedure, for example at TAI # 11. In that case, the MME 103 (history information storage unit 131) acquires the TAI "11" in step S1 (see FIG. 5). In step S2, the history information storage unit 131 stores the TAI “11” and the time stamp “2020/1/1 12:30” in association with each other.

The TAI number acquisition unit 132 compares the time stamp of TAI "11" with the time stamp of new subscriber registration (that is, the time stamp of TAI "5"). When the fixed time is set to 24 hours, the TAI number acquisition unit 132 determines in step S3 that a fixed time has not passed since the new subscriber registration. In that case, the process proceeds to step S8, and the TAI list transmission unit 136 acquires the static TAI list from the static TAI list holding unit 135. The TAI list transmitter 136 acquires the static TAI list 202 (see FIG. 6) when the terminal 101 is present at TAI # 11. The TAI list transmission unit 136 transmits the acquired static TAI list 202 to the terminal 101 in step S9.

It is assumed that the terminal 101 proceeds from TAI # 2 to TAI # 5, and the TAU procedure is executed at TAI # 5 at 6:00 on 1/2/2020. In that case, the history information storage unit 131 acquires the TAI "5" in step S1. In step S2, the history information storage unit 131 stores the TAI “5” and the time stamp “2020/1/2 6:00” in association with each other (see FIG. 8).

The TAI number acquisition unit 132 compares the time stamp of TAI "5" with the time stamp of new subscriber registration. When the fixed time is set to 24 hours, the TAI number acquisition unit 132 determines in step S3 that a fixed time has passed since the new subscriber registration. In that case, the process proceeds to step S4, and the TAI number acquisition unit 132 acquires the number of TAIs within a predetermined time, for example, within 24 hours from the history information storage unit 131. More specifically, the TAI number acquisition unit 132 acquires the number of TAIs whose time stamp indicates the time after 6:00 on 2020/1/1. In the example of FIG. 8, the movement pattern in the last 24 hours is nine TAIs surrounded by a broken line, and the TAI number acquisition unit 132 acquires "10" including the latest TAI as the number of TAIs within a predetermined time. do.

In step S5, the determination unit 133 compares the number of TAIs with the threshold value. For example, the maximum number of TAIs that can be included in the threshold and TAI list is "10". In that case, the determination unit 133 determines in step S5 that the number “10” of TAI is equal to or less than the threshold value “10”. The dynamic TAI list generation unit 134 generates a dynamic TAI list in step S6. More specifically, the dynamic TAI list generation unit 134 generates a TAI list including the latest "10" TAIs surrounded by a solid line in FIG. 9 as a dynamic TAI list. The TAI list transmission unit 136 transmits the generated dynamic TAI list to the terminal 101 in step S7.

FIG. 10 shows an example of a dynamic TAI list transmitted to the terminal 101. In the above case, the TAI list transmitter 136 sends a dynamic TAI list 210 including TAI # 5, # 6, # 7, # 12, # 11, # 18, # 10, # 3, and # 2 to the terminal 101. Send. When the terminal 101 moves in the same movement pattern as the previous day (2020/1/1), the terminal 101 moves within the TAI included in the dynamic TAI list. Assuming that the static TAI list shown in FIG. 6 is transmitted to the terminal 101, the TAI list straddle occurs four times, and the TAU procedure is executed every time the terminal 101 moves across the TAI list. .. By transmitting the dynamic TAI list to the terminal 101, it is possible to suppress the occurrence of unnecessary location registration requests without crossing the TAI.

FIG. 11-12 shows another example of the information stored in the history information storage unit 131. In FIG. 6, it is assumed that the terminal 101 has moved from TAI # 2 to TAI # 20 and # 26. In that case, as shown in FIG. 11, the history information storage unit 131 associates the TAI “20” with the time stamp “2020/1/2 2:30” in addition to the information shown in FIG. Remember. Further, the history information storage unit 131 stores the TAI “26” and the time stamp “2020/1/2 4:30” in association with each other.

After that, it is assumed that the history information storage unit 131 has acquired TAI "5" in step S1. In step S2, the history information storage unit 131 stores the TAI “5” in association with the time stamp “2020/1/2 6:00” (see FIG. 12). In step S3, the TAI number acquisition unit 132 determines whether or not 24 hours have passed since the new subscriber registration. The TAI number acquisition unit 132 determines in step S3 that a certain period of time has passed since the new subscriber registration. In that case, the TAI number acquisition unit 132 acquires the number of TAIs whose time stamp indicates the time after 6:00 on 2020/1/1. In the example of FIG. 12, the TAI number acquisition unit 132 acquires the number “11” of TAI enclosed by the broken line.

In step S5, the determination unit 133 compares the number of TAIs “12” and the threshold value “10”, and determines that the number of TAIs is larger than the threshold value. In that case, the process proceeds to step S8, and the TAI list transmission unit 136 acquires the static TAI list from the static TAI list holding unit 135. In step S8, the TAI list transmission unit 136 acquires a static TAI list 201 (see FIG. 6) including TAI # 5. The TAI list transmission unit 136 transmits the acquired static TAI list 201 to the terminal 101 in step S9.

In the present embodiment, the history information storage unit 131 stores the TAI in which the terminal 101 is located, and the determination unit 133 determines whether or not the number of TAIs within a predetermined time is equal to or less than the threshold value. The dynamic TAI list generation unit 134 is stored in the history information storage unit 131 for the terminal 101 in which the number of TAIs within a predetermined time is determined to be equal to or less than the threshold value, that is, the terminal 101 that moves in a narrow range. Generate a dynamic TAI list based on the TAI. The TAI list transmission unit 136 transmits the generated dynamic TAI list to the terminal 101. It is considered that a terminal having a narrow movement range within a predetermined time has a narrow movement range after that, and is unlikely to go out of the movement range within the predetermined time. Therefore, by transmitting a dynamic TAI list including TAIs in the service area within a predetermined time to such a terminal, it is possible to suppress the occurrence of crossing the TAI list and suppress unnecessary location registration opportunities. can.

In the present embodiment, the TAI list transmission unit 136 is a static TAI list holding unit for a terminal 101 in which the number of TAIs within a predetermined time is determined to be larger than the threshold value, that is, a terminal 101 that moves in a wide range. Send the static TAI list obtained from 135. It is considered that a terminal that moves in a wide range is likely to move to a tracking area different from the tracking area that has been moved so far. In this case, it is considered that the occurrence of TAI straddling can be suppressed by transmitting the static TAI list held by the MME to the terminal 101 rather than transmitting the dynamic TAI list including the TAIs in the service area within the predetermined time. Be done. As described above, in the present embodiment, by transmitting the dynamic TAI list or the static TAI list to the terminal 101 according to the movement characteristics of the terminal 101, the TAI list capable of suppressing the occurrence of crossing the TAI list is transmitted to the terminal 101. Can be provided.

Next, the hardware configuration of the MME will be described. FIG. 13 shows a configuration example of a network device that can be used as the MME 103. The network device 500 includes a network interface 510, a processor 530, and a memory 550. The network interface 510 is used for communication with network nodes such as base station 102 and SGW 104. The processor 530 reads software (computer program) from the memory 550 and executes it to realize at least a part of the functions in the MME 103 described in the above-described embodiment.

The memory 550 includes a volatile memory and a non-volatile memory. The memory 550 stores a group of software modules. The memory 550 may include storage located away from the processor 530. Processor 530 may access memory 550 via an I / O (Input / Output) interface (not shown).

The computer program is stored using various types of non-transitory computer-readable media and can be supplied to a network device. Non-transient computer-readable media include various types of tangible storage media. Examples of non-temporary computer-readable media are magnetic recording media such as flexible disks, magnetic tapes, or hard disks, such as magneto-optical recording media such as magneto-optical disks, CDs (compact discs), or DVDs (digital versatile disks). Includes optical disk media such as, and semiconductor memory such as mask ROM (read only memory), PROM (programmable ROM), EPROM (erasable PROM), flash ROM, or RAM (random access memory). The program may also be supplied to the network device using various types of temporary computer-readable media. Examples of temporary computer-readable media include electrical, optical, and electromagnetic waves. The temporary computer-readable medium can supply the program to the network device via a wired communication path such as an electric wire and an optical fiber, or a wireless communication path.

Although the embodiments of the present disclosure have been described in detail above, the present disclosure is not limited to the above-described embodiments, and changes and modifications are made to the above-described embodiments without departing from the spirit of the present disclosure. Are also included in this disclosure.

For example, some or all of the above embodiments may be described as, but not limited to, the following appendixes.

10: Call processing control device 11: History information storage means 12: Area number acquisition means 13: Determination means 14: List generation means 15: Transmission means 100: Communication system 101: Terminal 102: Base station 103: MME
104: SGW
105: PGW
131: History information storage unit 132: TAI number acquisition unit 133: Judgment unit 134: Dynamic TAI list generation unit 135: Static TAI list holding unit 136: TAI list transmission unit

Claims (10)

A tracking area where a terminal exists, a history information storage means for storing time information, and
With reference to the history information storage means, an area number acquisition means for acquiring the number of tracking areas in which the terminal was present within a predetermined time, and an area number acquisition means.
A determination means for comparing the number of acquired tracking areas with the threshold value and determining whether or not the number of the tracking areas is equal to or less than the threshold value.
When the number of the tracking areas is equal to or less than the threshold value, the list generation means for generating the first tracking area list based on the tracking areas stored in the history information storage means, and the list generation means.
When the number of the tracking areas is equal to or less than the threshold value, the first tracking area list is transmitted to the terminal, and when the number of the tracking areas is larger than the threshold value, the tracking area in which the terminal exists A call processing control device including a transmission means for transmitting a second tracking area list determined accordingly to the terminal. The call processing control device according to claim 1, wherein the area number acquisition means acquires the number of tracking areas in which the terminal has existed within a predetermined time after a certain time has elapsed from the registration of a new subscriber of the terminal. The call processing control device according to claim 1 or 2, wherein the transmission means transmits the second tracking area list to the terminal from the registration of a new subscriber of the terminal to the elapse of a certain time. The call processing control according to any one of claims 1 to 3, wherein the area number acquisition means acquires the number of tracking areas in which the terminal has existed within a predetermined time when a location registration request is received from the terminal. Device. The call processing control device according to any one of claims 1 to 4, wherein the threshold value indicates the maximum value of the number of tracking areas accommodated in the first tracking area list. From claim 1, the list generation means includes, among the tracking areas stored in the history information storage means, a tracking area in which the time information indicates after the time before the predetermined time in the first tracking area list. 5. The call processing control device according to any one of the following items. Further has a tracking area list holding means for storing a plurality of tracking area lists,
A claim that the transmission means acquires a tracking area list including a tracking area in which the terminal exists from the tracking area list holding means, and transmits the acquired tracking area list to the terminal as the second tracking area list. The call processing control device according to any one of 1 to 6. 13. Call processing control device. Memorize the tracking area where the terminal is located and the time information,
Get the number of tracking areas where the device was present within the specified time,
Compare the number of acquired tracking areas with the threshold value and
When the number of the tracking areas is equal to or less than the threshold value, a first tracking area list is generated based on the stored tracking areas.
When the number of the tracking areas is equal to or less than the threshold value, the first tracking area list is transmitted to the terminal.
A method for providing a tracking area list for transmitting a second tracking area list determined according to a tracking area in which the terminal is present to the terminal when the number of the tracking areas is larger than the threshold value. For network devices,
Memorize the tracking area where the terminal is located and the time information,
Get the number of tracking areas where the device was present within the specified time,
Compare the number of acquired tracking areas with the threshold value and
When the number of the tracking areas is equal to or less than the threshold value, a first tracking area list is generated based on the stored tracking areas.
When the number of the tracking areas is equal to or less than the threshold value, the first tracking area list is transmitted to the terminal.
When the number of the tracking areas is larger than the threshold value, a program for executing a process of transmitting a second tracking area list determined according to the tracking area in which the terminal exists to the terminal.

Images