JP6836374B2 - Relay device and program - Google Patents

Description

The present invention relates to a relay device that limits the places where it can be used.

Conventionally, a technique has been proposed in which whether or not a communication device is placed in a place where wireless communication is permitted is determined based on a signal received from the base station by the communication device. According to Patent Document 1, when the wireless relay device acquires area identification information different from the area identification information registered in the initial operation, it acquires position information from an external mobile terminal and determines whether or not there is an actual movement. It is stated that it should be done. In Patent Document 2, a base station to be used for setting the range of use of an electronic device is determined in advance, and the electronic device is used based on the radio field strength and position information received from one or a plurality of base stations. It is stated to determine if it is within range. Patent Document 3 describes that it is determined whether or not the portable PC is in the non-warning area by triangulation using a base station, and if it is determined that the portable PC is outside the non-warning area, user authentication is performed. Has been done. Patent Document 4 describes that the information processing apparatus is forced to log off when it goes out of the wireless service area of the base station after dial-up connection to the base station.

Japanese Unexamined Patent Publication No. 2014-187595 Japanese Unexamined Patent Publication No. 2014-33293 Japanese Unexamined Patent Publication No. 2008-131302 JP-A-2007-88624

However, among the identifiers unique to the base station transmitted by the base station (hereinafter referred to as "base station ID"), the base station ID received by the communication device is not only the movement of the communication device but also the base station ID. It may change due to renewal (for example, replacement of accommodation). Therefore, it is accurate to determine whether or not the communication device has actually moved by simply determining the presence or absence of movement based on the difference between the base station ID determined in advance and the base station ID actually obtained from the base station. It is difficult to judge. Patent Document 1 describes a mechanism for determining whether the base station ID has changed due to movement or the base station ID has changed due to update. However, in this mechanism, in addition to the signal from the base station, it is necessary to acquire the position information from the mobile terminal existing nearby to determine the presence or absence of the actual movement. Patent Documents 2 to 4 do not describe determining the cause of the change in the base station ID.
On the other hand, an object of the present invention is to provide a technique for performing relay processing on the condition that a relay device exists at a predetermined location based on an identifier obtained from a base station.

In order to solve the above-mentioned problems, the relay device of the present invention includes a first communication unit that communicates with a mobile communication network including a plurality of base stations, a second communication unit that communicates with an external wireless communication terminal, and a plurality of the above-mentioned relay devices. Among the identifiers transmitted by each of the base stations, the wireless communication terminal and the mobile communication network are based on the acquisition unit that acquires the identifier received by the first communication unit and the identifier acquired by the acquisition unit. It is provided with a stop control unit for stopping the relay process of relaying the communication performed with and from.

In the relay device of the present invention, the stop control unit may stop the relay process when the number of the identifiers acquired within a predetermined first period exceeds the threshold value.
In this case, the stop control unit may stop the relay process when the number of the identifiers acquired from one or more base stations connected via the first communication unit exceeds the threshold value. Good.
Further, the stop control unit stops the relay process when the number of the identifiers acquired from one or more base stations including the base station not connected via the first communication unit exceeds the threshold value. You may let me.
Further, the relay device of the present invention may include a setting unit that sets the threshold value based on the number of the identifiers acquired from one or more base stations connected via the first communication unit.
In addition, a setting unit that sets the threshold value may be provided based on the number of the identifiers acquired from one or more base stations including the base station that is not connected via the first communication unit.

The relay device of the present invention includes a position specifying unit that specifies the position of the self-relaying device when the identifier is acquired, and the setting unit acquires the position during a period in which the position specified by the position specifying unit does not change. The threshold value may be set based on the given identifier.

In the relay device of the present invention, the setting unit divides the first period into a plurality of unit periods, and the number of the identifiers acquired in one unit period among the plurality of unit periods is the number of other identifiers. When the number of the identifiers acquired in the unit period deviates from a predetermined standard or more, the threshold value may be set without using the acquisition result of the identifiers in the one unit period.

In the relay device of the present invention, the stop control unit may stop the relay process based on the temporal change of the identifier acquired by the acquisition unit.
In this case, the stop control unit starts a predetermined second period when the acquisition unit newly acquires the first identifier, and within the second period, the acquisition unit becomes the first identifier. When newly acquiring a different second identifier, the relay process may be stopped.
Further, if the stop control unit does not stop the relay process within the second period, then when a third identifier different from the first identifier is acquired, the second period May be started.
Further, the stop control unit may stop the relay process based on a change in the level of the radio signal including the first identifier, the second identifier, or the third identifier.
Further, the stop control unit does not have to stop the relay process when the two or more identifiers acquired by the acquisition unit change all at once.
Further, the stop control unit may stop the relay process based on the temporal change of the identifier when the number of the identifiers acquired by the acquisition unit exceeds the threshold value.
You may.

The program of the present invention comprises a computer of a relay device including a first communication unit that communicates with a mobile communication network including a plurality of base stations and a second communication unit that communicates with an external wireless communication terminal. Among the identifiers transmitted by each of the stations, the step of acquiring the identifier received by the first communication unit and the acquisition are performed between the wireless communication terminal and the mobile communication network based on the acquired identifier. It is a program for executing a step of stopping relay processing for relaying communication.

According to the present invention, it is possible to provide a technique for performing relay processing on condition that a relay device exists at a predetermined location based on an identifier obtained from a base station.

The figure which shows the system which concerns on 1st Embodiment of this invention. The block diagram which shows the structure of the relay device which concerns on the same embodiment. The figure which shows the structure of the table TB1 which concerns on the same embodiment. The flowchart which shows the control which concerns on (operation example 1) performed by the relay device which concerns on this embodiment. FIG. 5 is an explanatory diagram of an example of control according to (operation example 1) performed by the relay device according to the same embodiment. The flowchart which shows the control which concerns on (operation example 2) performed by the relay device which concerns on this embodiment. FIG. 5 is an explanatory diagram of an example of control according to (operation example 2) performed by the relay device according to the same embodiment. The block diagram which shows the structure of the relay device which concerns on 2nd Embodiment of this invention. The flowchart which shows the control which concerns on (operation example 1) performed by the relay device which concerns on the same embodiment. FIG. 5 is an explanatory diagram of an example of control according to (operation example 1) performed by the relay device according to the same embodiment. The flowchart which shows the control which concerns on (operation example 2) performed by the relay device which concerns on the same embodiment. FIG. 5 is an explanatory diagram of an example of control according to (operation example 2) performed by the relay device according to the same embodiment. The flowchart which shows the control which concerns on (operation example 3) performed by the relay device which concerns on the same embodiment. FIG. 5 is an explanatory diagram of an example of control according to (operation example 3) performed by the relay device according to the same embodiment. The block diagram which shows the structure of the relay device which concerns on 3rd Embodiment of this invention. The flowchart which shows the control performed by the relay device which concerns on the same embodiment. The block diagram which shows the structure of the relay device which concerns on 4th Embodiment of this invention. The flowchart which shows the control which concerns on (operation example 1) performed by the relay device which concerns on the same embodiment. FIG. 5 is an explanatory diagram of an example of control according to (operation example 1) performed by the relay device according to the same embodiment. The flowchart which shows the control which concerns on (operation example 2) performed by the relay device which concerns on the same embodiment. FIG. 5 is an explanatory diagram of an example of control according to (operation example 2) performed by the relay device according to the same embodiment. FIG. 5 is an explanatory diagram of an example of control according to (operation example 2) performed by the relay device according to the same embodiment.

The telecommunications carrier provides users with services capable of high-speed wireless communication such as LTE (Long Term Evolution). In order to use such a communication service, the user installs necessary equipment in a facility (for example, home) that uses the service. Even before the introduction of such equipment, in order to enable users to use communication services, telecommunications carriers provide customers with relay devices (for example, mobile Wi-Fi routers) for using high-speed wireless communication. A method of lending is conceivable. In this case, the telecommunications carrier lends the relay device to the customer with the intention of using it at a predetermined place such as the user's home. However, this type of relay device is often constructed to be lightweight and small enough to be freely carried by the user. In this case, this relay device may be used in a place other than the place intended by the telecommunications carrier. Hereinafter, a relay device having a function for reducing the possibility of such unintended use will be described.

[First Embodiment]
<Composition>
FIG. 1 is a diagram showing a system 1 according to the first embodiment.
The system 1 includes a relay device 10, a wireless communication terminal 20, and a mobile communication network 30. The relay device 10 wirelessly connects to the wireless communication terminal 20 and the mobile communication network 30. In the present embodiment, the connection means a state in which a communication path (session) for performing communication is established. The relay device 10 performs relay processing. The relay process is a process of relaying the communication performed between the wireless communication terminal 20 and the mobile communication network 30. The relay process includes processing such as transmission / reception of data with the wireless communication terminal 20 and transmission / reception of data with the mobile communication network 30. The wireless communication terminal 20 is a smartphone here, but may be a wireless communication terminal such as a feature phone or a tablet terminal.
Although FIG. 1 shows one relay device 10 and one wireless communication terminal 20, there are actually a plurality of relay devices 10.

The mobile communication network 30 is a communication network including a plurality of base stations. The mobile communication network 30 is, for example, a communication network conforming to the LTE standard, but may be a communication network conforming to another standard such as 3G. In FIG. 1, base stations BS1 to BS8 are shown as base stations included in the mobile communication network 30. The cell formed by the base station BSi (i is a natural number) is hereinafter referred to as "cell Ci". The relay device 10 existing in the cell Ci wirelessly connects to the base station BSi and communicates with the mobile communication network 30.

There is also a region where a plurality of cells Ci overlap. In the example of FIG. 1, the user's home H exists in an area where cells C1, C2, and C3 overlap. The relay device 10 existing in this area connects to the base station of any one of the base stations BS1, BS2, and BS3 to perform communication. The relay device 10 connects to, for example, the base station having the maximum level of the radio signal received from the base station (for example, the received electric field strength). Even if the position of the relay device 10 is fixed, the base station to which the relay device 10 is connected may change due to a change in the level of the radio signal or the like.
In the present embodiment, the relay device 10 is a relay device lent to the user by the telecommunications carrier for the purpose of being used at home H.

FIG. 2 is a block diagram showing the configuration of the relay device 10.
The relay device 10 includes a control unit 11, a first communication unit 12, a second communication unit 13, a storage unit 14, and an operation unit 15 as a hardware configuration.
The control unit 11 controls each unit of the relay device 10. The control unit 11 includes, for example, a CPU (Central Processing Unit) as an arithmetic processing device, a ROM (Read Only Memory), and a RAM (Random Access Memory) as a work area. The CPU controls each unit of the relay device 10 by reading the program stored in the ROM or the storage unit 14 into the RAM and executing the program.

The first communication unit 12 wirelessly connects to and communicates with the base station. When the relay device 10 is present in a certain cell, the first communication unit 12 may connect to the base station forming the cell. The first communication unit 12 receives, for example, a base station ID from a base station. The base station ID transmitted by the base station is an identifier unique to the base station. Further, the first communication unit 12 may receive the base station ID from the base station even when it is not connected to the base station. For example, even when the first communication unit 12 is not connected to a base station, the first communication unit 12 may receive a base station ID from the base station when the base station is approached by a certain distance or less. The first communication unit 12 includes, for example, a wireless communication circuit and an antenna.

The second communication unit 13 wirelessly connects to and communicates with the wireless communication terminal 20. The second communication unit 13 connects to the wireless communication terminal 20 which is close to a certain distance or less. The standard of communication performed by the second communication unit 13 is not particularly limited, but there are short-range wireless communication such as Wi-Fi (registered trademark) and Bluetooth (registered trademark). The second communication unit 13 includes, for example, a wireless communication circuit and an antenna.

The storage unit 14 stores data. The storage unit 14 includes, for example, a semiconductor memory as a storage device. The storage unit 14 stores the program executed by the control unit 11, the table TB1, and the threshold data. The table TB1 is a table for managing the acquisition history of the base station ID. The threshold data indicates a threshold value for the number of base station IDs acquired by the relay device 10. The threshold value is a value determined at the design stage or the manufacturing stage of the relay device 10.

FIG. 3 is a diagram showing the configuration of the table TB1.
The table TB1 is a table in which the base station ID and the time are associated with each other. The base station ID of the table TB is the base station ID acquired by the relay device 10. The time is the time when the base station ID is acquired by the relay device 10.

The operation unit 15 accepts the user's operation. The operation unit 15 includes, for example, a physical key and a touch sensor.

The control unit 11 realizes functions corresponding to the relay processing unit 111, the acquisition unit 112, and the stop control unit 113.
The relay processing unit 111 controls the first communication unit 12 and the second communication unit 13 to perform relay processing. The acquisition unit 112 acquires the base station ID received by the first communication unit 12 among the base station IDs transmitted by each of the plurality of base stations included in the mobile communication network 30. The acquisition unit 112 supplies the acquired base station ID to the stop control unit 113. The stop control unit 113 stops the relay process based on the base station ID acquired by the acquisition unit 112. The stop control unit 113 performs a process using the table TB1 and the threshold data in the control related to the stop of the relay process. When the relay processing is stopped, the stop control unit 113 supplies an instruction to stop the relay processing to the relay processing unit 111. The relay processing unit 111 stops the communication performed by at least one of the first communication unit 12 and the second communication unit 13 in response to the stop instruction.

<Operation>
(Operation example 1)
FIG. 4 is a flowchart showing the control performed by the relay device 10 (operation example 1). FIG. 5 is an explanatory diagram of an example of control according to this (operation example 1).
In the relay device 10, the relay processing unit 111 starts the relay processing (step S1). The trigger for starting the relay process is, for example, a user's instruction by turning on the power of the relay device 10 or operating the operation unit 15.

Next, the acquisition unit 112 acquires the base station ID transmitted by the base station to which the first communication unit 12 is connected (step S2). Next, the stop control unit 113 records the base station ID acquired by the acquisition unit 112 in the table TB1 in association with the time when the base station ID is acquired (step S3). When the acquired base station ID is already stored in the table TB1, the stop control unit 113 updates the time stored in the table TB1 according to the time when the base station ID is acquired. Next, the stop control unit 113 determines whether or not the number of acquired base station IDs exceeds the threshold value indicated by the threshold value data (step S4). Here, the number of acquired base station IDs is the number of types of base station IDs acquired by the relay device 10. For example, even if only the base station ID "ID001" is acquired a plurality of times, the number of acquisitions of the base station ID is "1". The threshold is determined based on the number of base stations that may be connected if the relay device 10 is located at home H. In the case shown in FIG. 1, the relay device 10 placed at the home H can be connected to the base stations BS1, BS2, and BS3. Therefore, it is assumed that the threshold value is set to at least "3" or more, here "4".

Here, consider a case where the relay device 10 is placed in the home H and the table TB1 is in the state shown in the upper part of FIG. That is, the table TB1 stores three base station IDs, "ID001", "ID002", and "ID003". In this case, the stop control unit 113 determines “NO” in step S4. Then, the process of the relay device 10 returns to step S2. That is, during the period when the number of acquired base station IDs is equal to or less than the threshold value, the processes of steps S2 to S4 (“NO” in step S4) are repeatedly executed assuming that the relay device 10 is not moving, and the relay process continues. Will be done.

Next, consider the case where the relay device 10 placed in the home H is taken out by the user. Here, it is assumed that the relay device 10 has moved to an area where the cell C4 of the base station BS4 and the cell C5 of the base station BS5 overlap, as shown in the lower part of FIG. At this time, in addition to "ID001", "ID002", and "ID003" as base station IDs, the table TB1 stores a total of five "ID004" and "ID005" acquired while the relay device 10 is moving. Has been done. In this case, the stop control unit 113 determines in step S4 that the number of acquired base station IDs exceeds the threshold value (step S4; YES). Then, the stop control unit 113 stops the relay process (step S5).
The stop control unit 113 may delete the base station ID from the base station in which the relay device 10 is not located and which the acquisition unit 112 no longer acquires, from the table TB1. If the number of base station IDs acquired within the period from the start of the relay process (corresponding to the first period of the present invention) can be specified, the data stored in the table TB1 and the management of the table TB1 The method does not matter. Further, the stop control unit 113 may determine whether or not the relay device 10 is moving based on the number of base station IDs acquired within the period after the time other than the start of the relay process. As this time point, for example, there is a time point when the acquisition history of the base station ID (that is, table TB1) in the relay device 10 is reset.

By the way, depending on the setting of the threshold value, it is possible to stop the relay process when the relay device 10 moves into the cell C4 of the base station BS4. However, the number of overlapping cells at the same point varies from place to place. Further, if the relay process is stopped even though the relay device 10 is not moving, it is inconvenient for the user. Therefore, in the present embodiment, the threshold value is set to be larger than the number of base stations that the relay device 10 can actually connect to.

(Operation example 2)
FIG. 6 is a flowchart showing the control performed by the relay device 10 (operation example 2). FIG. 7 is an explanatory diagram of an example of control according to this (operation example 2).
In the relay device 10, the relay processing unit 111 starts the relay processing (step S11). The trigger for starting the relay process is, for example, a user's instruction by turning on the power of the relay device 10 or operating the operation unit 15.

Next, the acquisition unit 112 acquires the base station ID received from the base station (step S12). In step S12, the acquisition unit 112 acquires not only the base station to which the first communication unit 12 is connected, but also the base station ID transmitted by the base station to which the first communication unit 12 is not connected. Next, the stop control unit 113 specifies the level of the radio signal (radio wave) including the acquired base station ID (step S13). When the specified level exceeds a predetermined level, the stop control unit 113 records the base station ID acquired in step S11 in the table TB1 in association with the time when the base station ID is acquired. (Step S14). When the acquired base station ID is already stored in the table TB1, the stop control unit 113 updates the time stored in the table TB1 according to the time when the base station ID is acquired. On the other hand, when the specified level is equal to or lower than the predetermined level, the stop control unit 113 does not record the base station ID acquired in step S12 in the table TB1.

Next, the stop control unit 113 determines whether or not the number of acquired base station IDs exceeds the threshold value indicated by the threshold value data (step S15). The threshold value is determined based on the number of base station IDs that may be acquired when the relay device 10 is placed at home H. In this (operation example 2), the threshold value is set to a value larger than the threshold value of (operation example 1). The threshold is, for example, "6".

Here, consider a case where the relay device 10 is placed in the home H and the table TB1 is in the state shown in the upper part of FIG. 7. That is, five base station IDs, "ID001", "ID002", "ID003", "ID004", and "ID007", are stored in the table TB1. In this case, the stop control unit 113 determines “NO” in step S15. Then, the process of the relay device 10 returns to step S12. That is, during the period when the number of acquired base station IDs is equal to or less than the threshold value, the process of steps S12 to S15 (“NO” in step S15) is repeatedly executed in the relay device 10, and the relay process is continued.

Next, consider the case where the relay device 10 placed in the home H is taken out by the user. Here, it is assumed that the relay device 10 has moved to an area where the cell C3 of the base station BS3 and the cell C7 of the base station BS7 overlap, as shown in the lower part of FIG. At this time, seven base station IDs "ID001" to "ID007" are stored in the table TB1. In this case, the stop control unit 113 determines in step S15 that the number of acquired base station IDs exceeds the threshold value (step S15; YES). Then, the stop control unit 113 stops the relay processing performed by the relay processing unit 111 (step S16).
Also in this operation example 2, the stop control unit 113 deletes the base station ID from the base station in which the relay device 10 is not located and which the acquisition unit 112 no longer acquires from the table TB1. You may. Further, the stop control unit 113 may determine whether or not the relay device 10 is moving based on the number of base station IDs acquired within the period after the time other than the start of the relay process.

In this (operation example 2), the relay device 10 also records the base station ID transmitted by the base station that is not connected in the table TB1. Therefore, the relay device 10 acquires the base station ID from many base stations existing in the vicinity as compared with the case of (operation example 1). Therefore, even a slight movement of the relay device 10 makes it easy for the base station ID acquired by the relay device 10 to change. That is, according to this (operation example 2), even if the distance traveled by the relay device 10 is short, the relay process can be easily stopped according to the movement.

By the way, the reason why the base station ID is recorded in the table TB1 only for the base stations whose radio signal level exceeds a predetermined level is that the radio signal level is not always constant and may fluctuate. according to. By stopping the relay processing based on the number of acquisitions of the base station ID included in the radio signal of the predetermined level or higher, it is unlikely that the relay processing will be stopped even though the relay device 10 has not moved. Become.

In the system 1 described above, even if the relay device 10 does not acquire the position information indicating the current position from the wireless communication terminal 20 or the like, the self-relay device is placed in a predetermined location based on the base station ID acquired from the base station. Relay processing can be performed on condition that it exists.

[Second Embodiment]
The relay device of the present embodiment has a configuration in which a threshold value for the number of acquired base station IDs is variable and this threshold value is set. The number of overlapping cells at the same point varies from place to place. Therefore, the relay device of the present embodiment sets a threshold value according to the place where the self-relay device is placed.

<Composition>
FIG. 8 is a block diagram showing the configuration of the relay device 10A of the present embodiment. The hardware configuration of the relay device 10A is the same as that of the relay device 10. The control unit 11 of the relay device 10A realizes a function corresponding to the setting unit 114 in addition to the functions corresponding to the relay processing unit 111, the acquisition unit 112, and the stop control unit 113. The acquisition unit 112 supplies the acquired base station ID to the setting unit 114 in addition to the stop control unit 113. The setting unit 114 sets the threshold value based on the number of base station IDs received from the base station via the first communication unit 12. The setting unit 114 updates the threshold data stored in the storage unit 14 according to the set threshold value.

Further, the storage unit 14 stores the table TB2. The table TB2 is a table in which the base station ID and the time are associated with each other, as in the table TB1. Table TB2 differs from table TB1 in that data used to set the threshold is recorded.

<Operation>
(Operation example 1)
FIG. 9 is a flowchart showing the control performed by the relay device 10A (operation example 1). FIG. 10 is an explanatory diagram of an example of control according to this (operation example 1).
In the relay device 10A, the relay processing unit 111 starts the relay processing (step S21). The trigger for starting the relay process is, for example, a user's instruction by turning on the power of the relay device 10A for the first time or operating the operation unit 15. Next, the setting unit 114 determines whether or not to set the threshold value (step S22). The setting unit 114 determines that the threshold value is set when the threshold value is not set, for example, when the relay device 10A first turns on the power, or when a predetermined update timing arrives.

If "YES" is determined in step S22, the acquisition unit 112 acquires the base station ID transmitted by the base station to which the first communication unit 12 is connected (step S23). Next, the stop control unit 113 records the base station ID acquired by the acquisition unit 112 in the table TB2 in association with the time when the base station ID is acquired (step S24). When the acquired base station ID is already stored in the table TB2, the stop control unit 113 updates the time stored in the table TB2 according to the time when the base station ID is acquired.

Next, the setting unit 114 determines whether or not the base station ID collection period has elapsed since the process related to the threshold setting was started (step S25). The collection period of the base station ID is a period in which the relay device 10A collects the base station ID from the surrounding base stations, and corresponds to the first period of the present invention. This collection period is set to be long enough to grasp the situation of the base station around the place where the relay device 10A is installed, for example, 24 hours.

If "NO" is determined in step S25, the process of the relay device 10A returns to step S23. That is, until the base station ID collection period elapses, the processes of steps S23 to S25 (“NO” in step S25) are repeatedly executed in the relay device 10A. During this base station ID collection period, the relay process is continuously performed.

If "YES" is determined in step S25, the setting unit 114 sets the threshold value based on the number of base station IDs acquired during the base station ID collection period (step S26). Specifically, the setting unit 114 sets the threshold value by a predetermined method using the number of acquired base station IDs based on the table TB2. The threshold value is, for example, a value obtained by adding or multiplying a predetermined value to the number of acquired base station IDs. When the relay device 10A is placed at the home H, the table TB2 is in the state shown in FIG. 10, for example. That is, the table TB2 stores three base station IDs, "ID001", "ID002", and "ID003". In this case, the setting unit 114 adds "1" to the number of acquired base station IDs and sets the threshold value to "4", for example. When the threshold value is set, the process of the relay device 10A proceeds to step S2. Even if it is determined in step S22 that the threshold value is not set (step S22; NO), the process of the relay device 10A proceeds to step S2. Then, the processes of steps S2 to S5 are executed in the same manner as in the above-described first embodiment (operation example 1).

(Operation example 2)
FIG. 11 is a flowchart showing the control performed by the relay device 10A (operation example 2). FIG. 12 is an explanatory diagram of an example of control according to this (operation example 2).
In the relay device 10A, the relay processing unit 111 starts the relay processing (step S31). The trigger for starting the relay process is, for example, a user's instruction by turning on the power of the relay device 10A or operating the operation unit 15. Next, the setting unit 114 determines whether or not to set the threshold value (step S32). The setting unit 114 determines that the threshold value is set when, for example, the relay device 10A has not set the threshold value when the power is turned on for the first time, or when a predetermined update timing has arrived.

If "YES" is determined in step S32, the acquisition unit 112 acquires the base station ID received from the base station by the first communication unit 12 (step S33). In step S33, the acquisition unit 112 acquires not only the base station to which the first communication unit 12 is connected, but also the base station ID transmitted by the base station to which the first communication unit 12 is not connected. Next, the setting unit 114 specifies the level of the radio signal including the acquired base station ID (step S34). When the specified level exceeds a predetermined level, the setting unit 114 records the base station ID acquired in step S33 in the table TB2 in association with the time when the base station ID is acquired (step S35). ). When the acquired base station ID is already stored in the table TB2, the setting unit 114 updates the time stored in the table TB2 according to the time when the acquired base station ID is acquired. On the other hand, when the specified level is equal to or lower than the predetermined level, the stop control unit 113 does not record the base station ID acquired in step S33 in the table TB2. The reason for referring to the level is the same as that of the above-described first embodiment (operation example 2).

Next, the setting unit 114 sets the threshold value based on the number of acquired base station IDs (step S36). Specifically, the setting unit 114 sets the threshold value by a predetermined method using the number of acquired base station IDs based on the table TB2. The threshold value is, for example, a value obtained by adding or multiplying a predetermined value to the number of acquired base station IDs. When the relay device 10A is placed at home H, the table TB2 is in the state shown in FIG. That is, five base station IDs, "ID001", "ID002", "ID003", "ID004", and "ID007", are stored in the table TB2. For example, the setting unit 114 adds "1" to the number of acquired base station IDs and sets the threshold value to "6". When the threshold value is set, the process of the relay device 10A proceeds to step S12. Even if it is determined in step S32 that the threshold value is not set (step S32; NO), the process of the relay device 10A proceeds to step S12. Then, the processes of steps S12 to S16 are executed in the same manner as in the above-described second embodiment (operation example 1).

(Operation example 3)
FIG. 13 is a flowchart showing the control according to the relay device 10A (operation example 3). FIG. 14 is an explanatory diagram of an example of control according to this (operation example 3).
In the relay device 10A, the relay processing unit 111 starts the relay processing (step S41). The trigger for starting the relay process is, for example, a user's instruction by turning on the power of the relay device 10A or operating the operation unit 15. Next, the setting unit 114 determines whether or not to set the threshold value (step S42). The setting unit 114 determines that the threshold value is set when, for example, the relay device 10A has not set the threshold value when the power is turned on for the first time, or when a predetermined update timing has arrived.

If "YES" is determined in step S42, the acquisition unit 112 acquires the base station ID received from the base station (step S43). In step S43, the acquisition unit 112 acquires not only the base station to which the first communication unit 12 is connected, but also the base station ID transmitted by the base station to which the first communication unit 12 is not connected. Since the base station ID of the base station to which the first communication unit 12 is not connected is also acquired in this way, the time for collecting the base station ID from the surrounding base stations is as shown in (Operation example 1). As a condition, it takes less time than the case of acquiring the base station ID.

Next, the setting unit 114 identifies the level of the radio signal including the base station ID (step S44). When the specified level exceeds a predetermined level, the setting unit 114 records the base station ID acquired in step S43 in the table TB2 in association with the time when the base station ID is acquired (step S45). ). When the acquired base station ID is already stored in the table TB2, the setting unit 114 updates the time stored in the table TB2 according to the time when the acquired base station ID is acquired. On the other hand, when the specified level is equal to or lower than the predetermined level, the stop control unit 113 does not record the base station ID acquired in step S43 in the table TB2. The reason for referring to the level is the same as in (Operation example 2).

Next, the setting unit 114 sets the threshold value based on the number of acquired base station IDs (step S46). In step S46, a threshold value for the number of base station IDs acquired by the relay device 10A connected to the base station as described in (Operation Example 1) is set. Here, the setting unit 114 sets the threshold value by a predetermined method using the number of acquired base station IDs. As shown in FIG. 14, the setting unit 114 decreases the threshold value as the number of acquisitions of the base station ID decreases, and increases the threshold value as the number of acquisitions of the base station ID increases. When the threshold value is set, the process of the relay device 10A proceeds to step S2. Even if it is determined in step S42 that the threshold value is not set (step S42; NO), the process of the relay device 10A proceeds to step S2. Then, the processes of steps S2 to S5 are executed in the same manner as in the above-described first embodiment (operation example 1).

According to this (operation example 3), the time required for the process related to the setting of the threshold value can be made shorter than that of (operation example 1).

[Third Embodiment]
The relay device of the present embodiment has a configuration in which a threshold value is set based on the base station ID and the position of the self-relay device. The reason for using the position of the relay device is to confirm whether or not the base station ID acquired for setting the threshold value is acquired when the relay device is not moving.

<Composition>
FIG. 15 is a block diagram showing the configuration of the relay device 10B of the present embodiment. The hardware configuration of the relay device 10B is the same as that of the relay device 10. The control unit 11 of the relay device 10B realizes a function corresponding to the position specifying unit 115 in addition to the functions corresponding to the relay processing unit 111, the acquisition unit 112, the stop control unit 113, and the setting unit 114.
The acquisition unit 112 supplies the acquired base station ID to the position identification unit 115 in addition to the stop control unit 113 and the setting unit 114. The position specifying unit 115 specifies the position of the relay device 10B when the base station ID is acquired by the acquisition unit 112. Here, the position specifying unit 115 specifies the position where the base station indicated by the base station ID exists as the position of the relay device 10B. The position specifying unit 115 identifies the position by inquiring to the position management server 40 connected to the mobile communication network 30 based on the base station ID acquired by the acquisition unit 112. The setting unit 114 sets the threshold value based on the base station ID acquired during the period in which the position specified by the position specifying unit 115 does not change, that is, the period in which the relay device 10B does not move.

FIG. 16 is a flowchart showing the control performed by the relay device 10B.
In the relay device 10B, the relay processing unit 111 starts the relay processing (step S51). The trigger for starting the relay process is, for example, a user's instruction by turning on the power of the relay device 10B or operating the operation unit 15. Next, the setting unit 114 determines whether or not to set the threshold value (step S52). The setting unit 114 determines that the threshold value is set when, for example, the relay device 10B has not set the threshold value when the power is turned on for the first time, or when a predetermined update timing has arrived.

Next, the acquisition unit 112 acquires the base station ID received from the base station to which the first communication unit 12 is connected (step S53). Next, the position specifying unit 115 specifies the position of the relay device 10B (step S54). The position specifying unit 115 identifies the position of the base station as the position of the relay device 10B by inquiring to the position management server 40 using the base station ID acquired in step S53. In the process of step S54, the inquiry to the location management server 40 may be made only when a new base station ID is acquired in step S53. The fact that the new base station ID has been acquired is because the relay device 10B may have moved. In this case, if a new base station ID is not acquired in step S53, the position specifying unit 115 has the same position as the position specified last time in the relay device 10B without inquiring about the position management server 40. You just have to specify that.

Next, the setting unit 114 determines whether or not the relay device 10B has moved based on the position specified by the position specifying unit 115 (step S55). If the position specified by the position specifying unit 115 has not changed from the position specified before that, the setting unit 114 determines that the relay device 10B has not moved (step S55; NO). When it is determined that the relay device 10B has not moved, the setting unit 114 records the base station ID acquired by the acquisition unit 112 in step S53 in the table TB2 in association with the time when the base station ID was acquired. (Step S56).

Next, the setting unit 114 determines whether or not the base station ID collection period has elapsed since the process related to the threshold setting was started (step S57). If "NO" is determined in step S57, the process of the relay device 10B returns to step S53. That is, the processes of steps S53 to S57 (“NO” in step S57) are repeatedly executed until the base station ID collection period elapses. During this base station ID collection period, the relay process is continuously performed. After that, if it is determined as "YES" in step S57, the setting unit 114 sets the threshold value based on the number of acquired base station IDs (step S58). The threshold value may be set in the same manner as in step S26.

On the other hand, if it is determined that the relay device 10B has moved before the base station ID collection period elapses (step S55; YES), the setting unit 114 cancels the process related to the threshold setting. Then, the setting unit 114 sets another threshold value (step S59). The setting unit 114 sets in step S59 when the position specified by the position specifying unit 115 changes from the position specified before that. The threshold value is, for example, a predetermined threshold value. When the threshold value is updated (reset) periodically, the setting unit 114 may reset the threshold value to the previously set threshold value. When the threshold value is set, the process of the relay device 10B proceeds to step S2. Even if it is determined in step S52 that the threshold value is not set (step S52; NO), the process of the relay device 10B proceeds to step S2. Then, the processes of steps S2 to S5 are executed in the same manner as in the above-described first embodiment (operation example 1).

The position specifying unit 115 is not the position information of the base station, but the position information obtained by the positioning function of the relay device 10B such as information acquisition from the GPS (Global Positioning System) or SUPL (Secure User Plane Location) server, and the position information. The position of the relay device 10B may be specified by using the position information acquired from the wireless communication terminal 20.

According to the relay device 10B of the present embodiment, it is possible to reduce the possibility that the threshold value is set to a value higher than necessary by moving the relay device 10B during the setting of the threshold value.

[Fourth Embodiment]
As described above, the base station ID transmitted by the base station may change due to an update due to accommodation change or the like. Therefore, the relay device of the present embodiment controls to stop the relay process when the base station ID changes due to the movement of the relay device based on the acquired base station ID with time.

<Composition>
FIG. 17 is a block diagram showing the configuration of the relay device 10C of the present embodiment. The hardware configuration of the relay device 10C is the same as that of the relay device 10. The control unit 11 of the relay device 10C realizes functions corresponding to the relay processing unit 111, the acquisition unit 112, the stop control unit 113C, and the setting unit 114. The stop control unit 113C stops the relay process based on the temporal change of the base station ID acquired by the acquisition unit 112.
The setting unit 114 sets the threshold value in the same manner as in the second embodiment or the third embodiment described above, for example.

<Operation>
(Operation example 1)
FIG. 18 is a flowchart showing the control performed by the relay device 10C (operation example 1). FIG. 19 is an explanatory diagram of an example of control according to this (operation example 1).
In the relay device 10C, the relay processing unit 111 starts the relay processing (step S61). The trigger for starting the relay process is, for example, a user's instruction by turning on the power of the relay device 10C or operating the operation unit 15. Next, the setting unit 114 acquires the base station ID received from the base station by the first communication unit 12 (step S62). In step S62, for example, the acquisition unit 112 acquires not only the base station to which the first communication unit 12 is connected, but also the base station ID transmitted by the base station to which the first communication unit 12 is not connected. Next, the stop control unit 113C specifies the level of the radio signal including the acquired base station ID (step S63). When the specified level exceeds a predetermined level, the stop control unit 113C records the base station ID acquired by the acquisition unit 112 in the table TB1 in association with the time when the base station ID is acquired. (Step S64). When the acquired base station ID is already stored in the table TB1, the stop control unit 113C updates the time stored in the table TB1 according to the time when the base station ID is acquired.

Next, the stop control unit 113C determines whether or not the number of acquired base station IDs exceeds the threshold value (step S65). If "NO" is determined in step S65, the process of the relay device 10C returns to step S62. Here, it is assumed that the threshold value is "4".

If "YES" is determined in step S65, the stop control unit 113C proceeds to step S66. Here, it is assumed that the base station IDs "ID001", "ID002", and "ID003" are recorded in the table TB1 at the time t1. Further, it is assumed that the base station IDs "ID101", "ID102", and "ID103" are acquired in step S62 at the time t2 after the time t1. The base station IDs "ID101", "ID102", and "ID103" correspond to the first identifier of the present invention. In this case, the base station IDs "ID101", "ID102", and "ID103" may have been newly acquired due to the movement of the relay device 10C, or the relay device 10C has not moved, but the base station ID has been updated. It is unknown at this point whether it was newly acquired by. Therefore, in the present embodiment, even if the number of acquired base station IDs exceeds the threshold value, the relay processing of the relay device 10C is continued. The period during which the relay process is continued for this reason is hereinafter referred to as a "grace period". The grace period corresponds to the second period of the present invention. The length of the grace period is predetermined.

If "YES" is determined in step S65, the stop control unit 113C activates the timer to start timing (step S66). This timer measures the elapsed time since the number of acquired base station IDs exceeds the threshold value.

Next, the acquisition unit 112 acquires the base station ID received from the base station to which the first communication unit 12 is connected (step S67). In step S67, the acquisition unit 112 acquires not only the base station to which the first communication unit 12 is connected, but also the base station ID transmitted by the base station to which the first communication unit 12 is not connected. Next, the stop control unit 113C specifies the level of the radio signal including the acquired base station ID (step S68). When the specified level exceeds a predetermined level, the stop control unit 113C records the base station ID acquired by the acquisition unit 112 in the table TB1 in association with the time when the base station ID is acquired. (Step S69). The stop control unit 113C determines whether or not a new base station ID has been acquired within the grace period (step S70).

If it is determined as "NO" in step S70, the stop control unit 113C determines whether or not the grace period has elapsed (step S71). If it is determined that the grace period has not elapsed, the process of the relay device 10C returns to step S67. As described above, within the grace period and during the period when the base station ID does not change, the processes of steps S67 to S71 (“NO” in steps S70 and S71) are repeatedly executed.

Here, as shown in the upper graph of FIG. 19, consider a case where the acquisition unit 112 acquires a new base station ID “ID104” at time t3 within the grace period. In this case, the stop control unit 113C determines "YES" in step S70 and stops the relay process (step S72). The base station ID "ID104" corresponds to the second identifier of the present invention. It is estimated that the frequency of renewal by changing the accommodation of the base station ID is not so high. Therefore, the change in the base station ID at the time t2 that triggered the start of the grace period and the change in the base station ID at the time t3 within the grace period are regarded as changes due to the movement of the relay device 10C.

If "YES" is determined in step S71, that is, if the acquisition unit 112 does not acquire a new base station ID by the elapse of the grace period, the stop control unit 113C re-acquires the number of acquisitions of the base station ID. Make the settings (step S73). Here, the stop control unit 113C sets the table TB1 so that the base station ID that triggered the start of the grace period is the base station ID that has changed due to the update. Here, as shown in the lower graph of FIG. 19, when a new base station ID is not acquired within the grace period after the base station IDs "ID101", "ID102", and "ID103" are acquired. think of. In this case, the base station IDs "ID001", "ID002", and "ID003" are no longer used due to the update of the base station ID, so the stop control unit 113C is not included in the number of acquisitions of the base station ID. To do so. Therefore, the stop control unit 113C deletes the base station IDs "ID001", "ID002", and "ID003" from the table TB1. As a result, at the time t4 after the grace period, the relay device 10C sets the number of acquired base station IDs to "3" of the base station IDs "ID101", "ID102", and "ID103". Then, the relay device 10C acquires a base station ID (corresponding to the third identifier of the present invention) different from the base station IDs "ID101", "ID102", and "ID103", and further obtains the base station ID. When the number of acquisitions exceeds the threshold value, the processing of step S66 and subsequent steps is performed.

According to the above-described (operation example 1), the relay device 10C can determine whether to update the base station ID or move the relay device 10C based on the change in the base station ID within the grace period. With this configuration, even if the threshold value is made smaller than that of the first to third embodiments described above, the possibility that the relay process is stopped even though the relay device 10 is not moving is reduced.
In steps S62 and S67, the acquisition unit 112 may acquire the base station ID from the base station to which the first communication unit 12 is connected. In this case, steps S63 and S68 can be omitted.

(Operation example 2)
FIG. 20 is a flowchart showing the control performed by the relay device 10C (operation example 2). FIG. 21 is an explanatory diagram of an example of control according to this (operation example 2).
The acquisition unit 112 acquires the base station ID received from the base station by the first communication unit 12 (step S81). In step S81, the acquisition unit 112 acquires not only the base station to which the first communication unit 12 is connected, but also the base station ID transmitted by the base station to which the first communication unit 12 is not connected. Next, the stop control unit 113C identifies the level of the radio signal from the base station that transmitted the acquired base station ID (step S82). Next, the stop control unit 113C determines whether or not the base station ID acquired by the acquisition unit 112 has changed (step S83). If "NO" is determined in step S83, the relay device 10C returns the process to step S81.

When it is determined as "YES" in step S83, that is, when it is determined that the base station ID acquired by the acquisition unit 112 has changed, the stop control unit 113C receives the radio signal from the base station indicated by the changed base station ID. It is determined whether or not the change in level satisfies a predetermined condition (step S84). Here, as shown in the upper graph of FIG. 21, the base station IDs "ID002", "ID003", and "ID101" are obtained from the state in which the base station IDs "ID001", "ID002", and "ID003" are acquired. Consider the case where "" has changed to the acquired state. In this example, the level of the radio signal including the base station ID "ID001" is instantaneously set to zero, and the level of the radio signal including the base station ID "ID101" is momentarily increased. In such a case, it is considered that the base station ID has been updated from "ID001" to "ID101". In this way, when the amount of change in the level of the radio signal including the base station ID in a unit time exceeds the threshold value, the stop control unit 113C determines “YES” in step S84 and continues the relay process. Then, the relay device 10C returns the process to step S81.

On the other hand, as shown in the upper graph of FIG. 22, the level of the radio signal including the base station ID "ID001" decreased slightly, and the level of the radio signal including the base station ID "ID101" increased slightly. Consider the case. In such a case, it is considered that the base station ID "ID001" is no longer acquired and "ID101" is acquired due to the movement of the relay device 10C. This is because the movement of the relay device 10C accompanies the movement of the user, so that the level of the radio signal from the base station should gradually decrease as the distance from the base station increases. In this way, when the amount of change in the unit time of the level of the radio signal including the base station ID is equal to or less than the threshold value, the stop control unit 113C determines “NO” in step S84 and stops the relay process (step S85). ..
Note that this control (operation example 2) may be performed only during the period when the number of acquired base station IDs exceeds the threshold value.

According to the above-described (operation example 2), it is possible to determine whether the base station ID is updated or the relay device 10C is moved based on the change in the level of the radio signal including the base station ID. With this configuration, even when a part of the plurality of base station IDs acquired by the relay device 10C is updated, it is possible to accurately control the stop of the relay process.
In the present embodiment, when the threshold value is set to a fixed value, the setting unit 114 may be omitted from the function of the control unit 11.

[Modification example]
The present invention may be implemented in a form different from the above-described embodiment. Moreover, you may combine each of the modification shown below.
(Modification example 1)
Regarding (Operation Example 2) of the second embodiment described above, the setting unit 114 divides the collection period of the base station ID into a plurality of unit periods, and the base station ID in one unit period among the plurality of unit periods. If the number of acquisitions of is more than a predetermined standard with respect to the number of acquisitions in another unit period, a threshold value may be set without using the acquisition result of the base station ID in the one unit period. .. For example, assume that the length of the base station ID collection period is 24 hours and the length of the unit period is 1 hour. In this case, if the number of base station IDs acquired in one unit period is "6" and the number of base station IDs acquired in other unit periods is "3", the relay device is used in the one unit period. 10A may have moved. Therefore, the setting unit 114 excludes the one unit period and sets the threshold value. This makes it possible to prevent the threshold value from being set excessively high.

(Modification 2)
Regarding the fourth embodiment described above, when the two or more base station IDs acquired by the acquisition unit 112 change all at once, the stop control unit 113C considers the accommodation to be replaced and may continue the relay processing without stopping. Good. When two or more base station IDs change all at once, it means that two or more base station IDs change at the same time or all within a predetermined time. This is because when the base station ID is updated by the accommodation change, the update may be performed at a plurality of base stations at the same time. On the other hand, when the base station ID of only one of them changes, the stop control unit 113C considers that the relay device 10C has moved and stops the relay process.
The control of this modification may be performed only during the period when the number of acquired base station IDs exceeds the threshold value.

(Modification 3)
Regarding the second embodiment described above, the first power-on of the relay device 10A is not always performed at the place where the relay device 10A should be originally used. Therefore, the setting unit 114 of the relay device 10A may reset the acquisition history of the base station ID recorded in the table TB2 and reset the threshold value. However, if this resetting is performed frequently, the relay device 10A can be used in various places. Therefore, when the table TB2 is reset, the setting unit 114 may not perform the relay process within a certain period of time. Further, the setting unit 114 may limit the number of resettable times.

(Modification example 4)
Regarding the third embodiment described above, the stop control unit 113 does not stop the relay process immediately after determining that the relay device 10B has moved based on the base station ID, but performs it after the determination of the movement. Based on the result of the positioning, it may be determined whether or not the relay processing is stopped. This positioning is performed by, for example, the position specifying unit 115 by acquiring information from GPS or a SUPL server, or by positioning a base station. The stop control unit 113 stops the relay process when it is determined that the relay device 10B has moved based on the result of this positioning. For example, when the position information of the contractor's address is stored in advance in the storage unit 14, and the distance between the positioning result and the position indicated by the position information is equal to or longer than a predetermined distance, the stop control unit 113 relays. It is determined that the device 10B has moved. It is conceivable to always use the location information of the contractor's address to determine the presence or absence of movement, but it may not be desirable from the viewpoint of server load and traffic to always perform such positioning. As in the relay device 10B of this modification, if positioning is performed after determining that there has been a movement based on the base station ID, the movement of the relay device 10B can be promptly detected without constantly performing this positioning. Can be detected.
The configuration of this modification can also be applied to each operation example of the first, second, and fourth embodiments described above.

(Modification 5)
A part of the configuration and operation described in the above-described embodiment may be omitted. For example, the relay device 10C of the fourth embodiment described above may start the grace period when a new base station ID is acquired without considering the threshold value.
Further, the relay device of the present invention may perform the operations of the two or more operation examples described above.

(Modification 6)
The function realized by the control unit 11 of the relay devices 10, 10A, 10B, and 10C of the above-described embodiment can be realized by combining a plurality of programs or by linking a plurality of hardware resources. When the function of the control unit 11 is realized by using a program, this program includes a magnetic recording medium (magnetic tape, magnetic disk (HDD (Hard Disk Drive), FD (Flexible Disk), etc.)), optical recording medium (optical disk). Etc.), may be provided in a state of being stored in a computer-readable recording medium such as an optical magnetic recording medium or a semiconductor memory, or may be distributed via a network. The present invention can also be realized as a control method for a relay device.

1 ... System, 10, 10A, 10B, 10C ... Relay device, 11 ... Control unit, 111 ... Relay processing unit, 112 ... Acquisition unit, 113, 113C ... Stop control unit, 114 ... Setting unit, 115 ... Position identification unit, 12 ... 1st communication unit, 13 ... 2nd communication unit, 14 ... storage unit, 15 ... operation unit, 20 ... wireless communication terminal, 30 ... mobile communication network, 40 ... location management server.

Claims (9)

The first communication unit that communicates with the mobile communication network including multiple base stations,
The second communication unit that communicates with an external wireless communication terminal,
Among the identifiers transmitted by each of the plurality of base stations, the acquisition unit that acquires the identifier received by the first communication unit, and the acquisition unit.
When the number of identifiers acquired by the acquisition unit exceeds the threshold within the predetermined first period , the predetermined second period is started, and within the second period, the acquisition unit within the first period. When a new identifier different from the acquired identifier is acquired, the relay process for relaying the communication performed between the wireless communication terminal and the mobile communication network is stopped, while the relay process is stopped within the second period. When the acquisition unit does not newly acquire an identifier different from the identifier acquired within the first period, the relay process for relaying the communication performed between the wireless communication terminal and the mobile communication network is not stopped. A relay device equipped with a stop control unit. The stop control unit
The number of the identifier obtained from one or more base stations connected through the first communication unit, if it exceeds the threshold, the relay according to claim 1, characterized in that stops the relay process apparatus. The stop control unit
The claim is characterized in that the relay process is stopped when the number of the identifiers acquired from one or more base stations including the base station not connected via the first communication unit exceeds the threshold value. The relay device according to 1. Any one of claims 1 to 3 , wherein the setting unit for setting the threshold value is provided based on the number of the identifiers acquired from one or more base stations connected via the first communication unit. The relay device according to item 1. Based on the number of the identifier obtained from one or more base stations including base station not being connected via the first communication unit, wherein the claim 1, characterized in that it comprises a setting unit that sets the threshold value Item 4. The relay device according to any one of Item 4. A position specifying unit for specifying the position of the self-relaying device when the identifier is acquired is provided.
The setting unit
The relay device according to claim 4 or 5 , wherein the threshold value is set based on the identifier acquired during the period in which the position specified by the position specifying unit has not changed. The setting unit
The first period is divided into a plurality of unit periods, and the number of the identifiers acquired in one unit period among the plurality of unit periods is the number of the identifiers acquired in the other unit period. In the case of deviation from a predetermined standard or more, any one of claims 4 to 6 is characterized in that the threshold value is set without using the acquisition result of the identifier in the one unit period. The relay device described. The stop control unit
The relay device according to claim 1 or 7 , wherein the relay process is not stopped when two or more of the identifiers acquired by the acquisition unit change all at once. The first communication unit that communicates with the mobile communication network including multiple base stations,
The second communication unit that communicates with an external wireless communication terminal,
To the computer of the relay device equipped with
Among the identifiers transmitted by each of the plurality of base stations, the step of acquiring the identifier received by the first communication unit, and
When the number of the identifiers acquired within the predetermined first period exceeds the threshold value, the predetermined second period is started, and the identifiers acquired within the second period are different from the identifiers acquired within the first period. When the identifier is newly acquired, the relay process for relaying the communication performed between the wireless communication terminal and the mobile communication network is stopped, and the identifier is acquired within the second period and within the first period. A program for executing a step of not stopping the relay process of relaying the communication performed between the wireless communication terminal and the mobile communication network when a new identifier different from the above-mentioned identifier is not acquired.

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