JP7540993B2 - Program, method, and wireless communication terminal - Google Patents

Description

The present invention relates to a program, a method, and a wireless communication terminal.

Patent Document 1 describes an International Mobile Equipment Identity Software Version (IMEISV) including a Software Version Number (SVN).
[Prior Art Literature]
[Patent Documents]
[Patent Document 1] Republished Publication No. 2014-006815

According to one embodiment of the present invention, a program is provided. The program may be a program for causing a wireless communication terminal to execute a deletion procedure for deleting a GUTI (Globally Unique Temporary Identifier) acquired from a core network and stored in a storage unit before transmitting a connection request to a core network when implementing FOTA (Firmware Over the Air).

The deletion procedure may delete the GUTI stored in the storage unit in response to restarting the wireless communication terminal after the FOTA implementation setting is performed. The program may be a program for causing the wireless communication terminal to execute a control procedure for controlling the wireless communication terminal to transmit a connection request including the IMSI of the wireless communication terminal to the core network after the GUTI is deleted by the deletion procedure. The program may be a program for causing the wireless communication terminal to execute a notification procedure for notifying the core network of the IMEISV of the wireless communication terminal by a Security Mode Complete message in response to receiving a Security Mode Command message from the core network after the connection request is transmitted to the core network by control in the control procedure.

The wireless communication terminal may be a terminal that complies with 3GPP (3rd Generation Partnership Project). The wireless communication terminal may be a terminal that complies with LTE (Long Term Evolution) communication method, and the connection request may be an Attach Request. The wireless communication terminal may be a terminal that complies with 5G (5th Generation) communication method, and the connection request may be a Registration Request, and the deletion procedure may delete the 5G GUTI stored in the storage unit.

According to one embodiment of the present invention, a program is provided. The program may be a program for causing a wireless communication terminal to execute a determination procedure for determining whether or not a GUTI has been assigned by a core network when implementing FOTA. The program may be a program for causing a wireless communication terminal to execute a control procedure for controlling the wireless communication terminal to transmit a connection request including the IMSI of the wireless communication terminal to the core network instead of the GUTI when it is determined in the determination procedure that a GUTI has been assigned.

According to one embodiment of the present invention, a method executed by a wireless communication terminal is provided. The method may include a storage step of storing a GUTI acquired from a core network in a storage unit. The method may include a deletion step of deleting the GUTI stored in the storage unit before transmitting a connection request to the core network when FOTA is implemented. The method may include a transmission step of transmitting a connection request including the IMSI of the wireless communication terminal to the core network.

According to one embodiment of the present invention, a method is provided that is executed by a wireless communication terminal. The method may include a determination step of determining whether or not a GUTI has been assigned by the core network when FOTA is implemented. The method may include a control step of controlling to transmit a connection request including the IMSI of the wireless communication terminal to the core network instead of the GUTI when it is determined in the determination step that a GUTI has been assigned.

According to one embodiment of the present invention, a wireless communication terminal is provided. The wireless communication terminal may include a storage unit that stores a GUTI acquired from a core network. When implementing FOTA, the wireless communication terminal may include a deletion unit that deletes the GUTI stored in the storage unit before transmitting a connection request to the core network. The wireless communication terminal may include a communication unit that transmits a connection request including the IMSI of the wireless communication terminal to the core network after the GUTI is deleted by the deletion unit.

According to one embodiment of the present invention, a wireless communication terminal is provided. The wireless communication terminal may include a determination unit that determines whether or not a GUTI has been assigned by the core network when FOTA is implemented. The wireless communication terminal may include a communication unit that transmits a connection request including the IMSI of the wireless communication terminal to the core network instead of the GUTI when the determination unit determines that a GUTI has been assigned.

Note that the above summary of the invention does not list all of the necessary features of the present invention. Also, subcombinations of these features may also be inventions.

1 illustrates a schematic diagram of an example of a system 10. FIG. 11 is an explanatory diagram illustrating a process during FOTA by a conventional wireless communication terminal 300. FIG. 2 is an explanatory diagram for explaining an example of processing during FOTA by the wireless communication terminal 100. 2 illustrates an example of a functional configuration of the wireless communication terminal 100. 13 illustrates an example of a processing flow by the wireless communication terminal 100. 2 illustrates an example of a functional configuration of the wireless communication terminal 100. 13 illustrates an example of a processing flow by the wireless communication terminal 100. 1 shows an example of a hardware configuration of a computer 1200 that functions as the wireless communication terminal 100.

In order to see the penetration rate of FOTA in the market, data is collected using the operating status of each SVN of the IMEISV. However, in the conventional system, the trigger for notifying the core network of the IMEISV from the terminal is limited to the occurrence of a specific event, so it takes time for the latest IMEISV information to be reflected on the DB (Database) side. In an implementation based on the 3GPP standard, the latest SWN is not immediately notified to the core network side at the time of FOTA. In contrast, in the system 10 according to this embodiment, for example, the terminal operates so that the IMEISV information is promptly notified to the core network side at the time of FOTA.

The present invention will be described below through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. Furthermore, not all of the combinations of features described in the embodiments are necessarily essential to the solution of the invention.

Figure 1 shows an example of a system 10. The system 10 includes a wireless communication terminal 100 and a core network 20. The system 10 may include a wireless base station 30. The system 10 may include a DataLake/DWH (DataWareHouse) 50.

The system 10 complies with 3GPP. If the system 10 complies with the LTE communication method, the core network 20 may be an EPC (Evolved Packet Core) and the radio base station 30 may be an eNB (eNodeB). If the system 10 complies with the 5G communication method, the core network 20 may be a 5GC (5G Core) and the radio base station 30 may be a gNB (gNodeB).

The wireless communication terminal 100 may be a so-called user terminal. The wireless communication terminal 100 may be a so-called mobile station.

The wireless communication terminal 100 upgrades its software by performing FOTA. The SVN of the wireless communication terminal 100 is updated with the upgrade.

In a mobile communication network, the wireless communication terminal 100 notifies its own IMEISV in response to a request for IMEISV from the core network 20. However, due to specifications, the GUTI remains in the wireless communication terminal 100, and this process is not triggered by the core network 20. For this reason, the wireless communication terminal 100 is only triggered to notify the core network 20 of the IMEISV when a specific event occurs. Specifically, the wireless communication terminal is only triggered to notify the core network 20 of the IMEISV when the wireless communication terminal performs an IRAT (Inter RAT handover) from 3G to LTE, etc.

Figure 2 is an explanatory diagram explaining the processing during FOTA by a conventional wireless communication terminal 300. Here, the explanation is given using an example in which the system 10 complies with LTE.

After performing FOTA, the wireless communication terminal 300 transmits an Attach Request to the core network 20 including the GUTI. In this case, due to the specifications, the core network 20 does not request the wireless communication terminal 300 to provide the IMEISV, and the core network 20 returns an Attach Accept to the wireless communication terminal 300.

Figure 3 is an explanatory diagram for explaining an example of processing during FOTA by the wireless communication terminal 100. After performing FOTA, the wireless communication terminal 100 according to this embodiment deletes the GUTI. As a result, the wireless communication terminal 100 transmits an Attach Request including an IMSI (Globally Unique Temporary Identifier).

When the core network 20 receives an Attach Request including the IMSI, in accordance with the specifications, it sends a Security Mode Command message to the wireless communication terminal 300. Then, the wireless communication terminal 100 notifies the core network 20 of the IMEISV of the wireless communication terminal 100 by a Security Mode Complete message in response to the Security Mode Command message.

In this way, by having the wireless communication terminal 100 delete the GUTI when FOTA is performed, the SVN updated by performing FOTA can be immediately notified to the core network 20 side.

The IMEISV of the wireless communication terminal 100 notified to the core network 20 is acquired and stored, for example, by DataLake/DWH 50. This makes it possible to manage the latest SVN status of multiple wireless communication terminals 100.

The information stored in DataLake/DWH50 can be used for a variety of purposes. For example, after a software fix for a defect is released to the market, it can be used to analyze the extent to which the software has been adopted.

Figure 4 shows an example of the functional configuration of the wireless communication terminal 100. The wireless communication terminal 100 includes a memory unit 102, a communication unit 104, a setting unit 106, a control unit 108, and a deletion unit 110.

The storage unit 102 stores various information. For example, the storage unit 102 stores the IMSI of the wireless communication terminal 100. The storage unit 102 stores the IMEI of the wireless communication terminal 100. The storage unit 102 stores the IMEISV of the wireless communication terminal 100.

The communication unit 104 performs various communications. The communication unit 104 communicates with the core network 20 via the wireless base station 30. The communication unit 104 performs a connection to the core network 20.

In the connection process, the communication unit 104 receives the GUTI assigned by the core network 20 and stores it in the storage unit 102. The GUTI may be assigned by a Mobility Management Entity (MME) if the core network 20 complies with the LTE communication method, and may be assigned by an Access and Mobility Management Function (AMF) if the core network 20 complies with the 5G communication method.

The setting unit 106 sets the implementation of FOTA. The setting unit 106 accepts the implementation setting of FOTA by the user of the wireless communication terminal 100, for example, via a user interface of the wireless communication terminal 100.

The control unit 108 executes various controls. When the implementation of FOTA is set by the setting unit 106, the control unit 108 implements FOTA according to the setting. The control unit 108 may update the software of the wireless communication terminal 100 using the distributed information.

When the control unit 108 performs FOTA, the deletion unit 110 deletes the GUTI stored in the storage unit 102. When the control unit 108 performs FOTA, the deletion unit 110 deletes the GUTI stored in the storage unit 102 before the communication unit 104 transmits a connection request to the core network 20 after performing FOTA.

The deletion unit 110 deletes the GUTI stored in the storage unit 102, for example, in response to the control unit 108 implementing FOTA. The deletion unit 110 may delete the GUTI stored in the storage unit 102 immediately after the control unit 108 implements FOTA.

The deletion unit 110 may delete the GUTI stored in the memory unit 102 when the wireless communication terminal 100 is restarted after a user operation of the FOTA is performed.

After the GUTI stored in the memory unit 102 is deleted by the deletion unit 110, the control unit 108 controls the transmission of a connection request including the IMSI of the wireless communication terminal 100 to the core network 20. The communication unit 104 transmits the connection request to the core network 20 under the control of the control unit 108. If the wireless communication terminal 100 is a terminal that complies with the LTE communication method, the connection request may be an Attach Request. If the wireless communication terminal 100 is a terminal that complies with the 5G communication method, the connection request may be a Registration Request.

After the communication unit 104 transmits a connection request to the core network 20, the control unit 108 notifies the core network 20 of the IMEISV of the wireless communication terminal 100 by a Security Mode Complete message in response to receiving a Security Mode Command message from the core network 20.

The wireless communication terminal 100 includes a storage unit 102, a communication unit 104, a setting unit 106, a control unit 108, and a deletion unit 110, for example, by installing a program according to this embodiment. For example, the deletion unit 110 is implemented in the wireless communication terminal 100 including the storage unit 102, the communication unit 104, the setting unit 106, and the control unit 108 by installing a program. By implementing the deletion unit 110 in the wireless communication terminal 100, the program may cause the wireless communication terminal 100 to execute a deletion procedure for deleting the GUTI acquired from the core network 20 and stored in the storage unit 102 before transmitting a connection request to the core network 20 when implementing FOTA.

Furthermore, by installing the program, the wireless communication terminal 100 may further be equipped with a control unit 108 having the above function. The program may be for causing the wireless communication terminal 100 to execute a control procedure for controlling the wireless communication terminal 100 to transmit a connection request including the IMSI of the wireless communication terminal 100 to the core network 20 after the GUTI is deleted by the deletion procedure. The program may also be for causing the wireless communication terminal 100 to execute a notification procedure for notifying the core network 20 of the IMEISV of the wireless communication terminal 100 by a Security Mode Complete message in response to receiving a Security Mode Command message from the core network 20 after the connection request is transmitted to the core network 20 by control in the control procedure.

Figure 5 shows an example of the flow of processing by the wireless communication terminal 100. Here, the wireless communication terminal 100 will be described as being in a starting state in which FOTA implementation settings have been made.

In step (sometimes abbreviated to S) 102, the control unit 108 performs FOTA. In S104, the deletion unit 110 determines whether or not there is a GUTI in the memory unit 102. If it is determined that there is a GUTI, in S106 the deletion unit 110 deletes the GUTI stored in the memory unit 102. After S102, or after S104 and S106, the wireless communication terminal 100 may be rebooted.

In S108, under the control of the control unit 108, the communication unit 104 transmits a connection request including the IMSI of the wireless communication terminal 100 stored in the storage unit 102 to the core network 20. In S110, a Security Mode Command message from the core network 20 is awaited. If a Security Mode Command message is received from the core network 20 (YES in S110), the process proceeds to S112.

In S112, under the control of the control unit 108, the communication unit 104 notifies the core network 20 of the IMEISV stored in the storage unit 102 by Security Mode Complete. In S114, the communication unit 104 waits for an Attach Accept from the core network 20. If an Attach Accept is received from the core network 20 (YES in S114), the connection is completed and the process ends. The control unit 108 may end the process if the wait for an Attach Accept times out or if the connection request is rejected.

Figure 6 shows an outline of another example of the functional configuration of the wireless communication terminal 100. The wireless communication terminal 100 includes a memory unit 102, a communication unit 104, a setting unit 106, a control unit 108, and a determination unit 120. Here, differences from the wireless communication terminal 100 shown in Figure 4 will be mainly described.

When the control unit 108 performs FOTA, the determination unit 120 determines whether or not a GUTI has been assigned by the core network 20. When a GUTI is stored in the memory unit 102, the determination unit 120 may determine that a GUTI has been assigned by the core network 20, and when a GUTI is not stored in the memory unit 102, the determination unit 120 may determine that a GUTI has not been assigned by the core network 20.

When the determination unit 120 determines that a GUTI has been assigned, the control unit 108 controls the communication unit 104 to transmit a connection request including the IMSI stored in the memory unit 102 to the core network 20 instead of the GUTI stored in the memory unit 102. The control unit 108 controls the communication unit 104 to transmit a connection request including the IMSI to the core network 20 instead of the GUTI.

The determination unit 120 determines whether or not a GUTI has been assigned in response to, for example, the control unit 108 implementing FOTA. The determination unit 120 may determine whether or not a GUTI has been assigned in response to the wireless communication terminal 100 being restarted after the setting unit 106 has implemented FOTA. The determination unit 120 may determine whether or not a GUTI has been assigned in response to the wireless communication terminal 100 being restarted after the control unit 108 has implemented FOTA.

When the determination unit 120 determines that a GUTI has not been assigned, the control unit 108 may control the transmission of a connection request including the IMSI stored in the memory unit 102 to the core network 20.

The wireless communication terminal 100 is provided with a storage unit 102, a communication unit 104, a setting unit 106, a control unit 108, and a determination unit 120, for example, by installing a program according to this embodiment. For example, the determination unit 120 is implemented in the wireless communication terminal 100 that is provided with the storage unit 102, the communication unit 104, the setting unit 106, and the control unit 108, by installing a program. The program may be for implementing the determination unit 120 in the wireless communication terminal 100, so that the wireless communication terminal 100 executes a determination procedure for determining whether or not a GUTI has been assigned by the core network 20 when implementing FOTA.

In addition, by installing the program, a control unit 108 having the above-mentioned functions may be further implemented in the wireless communication terminal 100. The program may be for causing the wireless communication terminal 100 to execute a control procedure for controlling the wireless communication terminal 100 to transmit a connection request including the IMSI of the wireless communication terminal 100 to the core network 20 instead of the GUTI when it is determined in the determination procedure that a GUTI has been assigned.

Figure 7 shows an outline of another example of the flow of processing by the wireless communication terminal 100. The following describes a state in which the wireless communication terminal 100 is set up to implement FOTA as a starting state. Here, the differences from Figure 5 will be mainly described.

In S202, the control unit 108 performs FOTA. In S204, the determination unit 120 determines whether or not a GUTI exists in the memory unit 102. If it is determined that a GUTI exists, the process proceeds to S206, and if it is determined that a GUTI does not exist, the process proceeds to S208.

In S206, the control unit 108 controls to transmit a connection request including the IMSI to the core network 20 instead of the GUTI. In S208, the control unit 108 controls to transmit a connection request including the IMSI to the core network 20. After S202 or after S204, the wireless communication terminal 100 may be rebooted.

Figure 8 shows an example of a hardware configuration of a computer 1200 functioning as a wireless communication terminal 100. A program installed on the computer 1200 can cause the computer 1200 to function as one or more "parts" of an apparatus according to the present embodiment, or to execute operations or one or more "parts" associated with an apparatus according to the present embodiment, and/or to execute a process or steps of the process according to the present embodiment. Such a program can be executed by the CPU 1212 to cause the computer 1200 to execute specific operations associated with some or all of the blocks of the flowcharts and block diagrams described herein.

The computer 1200 according to this embodiment includes a CPU 1212, a RAM 1214, and a graphics controller 1216, which are connected to each other by a host controller 1210. The computer 1200 also includes input/output units such as a communication interface 1222, a storage device 1224, a DVD drive, and an IC card drive, which are connected to the host controller 1210 via an input/output controller 1220. The DVD drive may be a DVD-ROM drive, a DVD-RAM drive, etc. The storage device 1224 may be a hard disk drive, a solid state drive, etc. The computer 1200 also includes a ROM 1230 and a legacy input/output unit such as a keyboard, which are connected to the input/output controller 1220 via an input/output chip 1240.

The CPU 1212 operates according to the programs stored in the ROM 1230 and the RAM 1214, thereby controlling each unit. The graphics controller 1216 acquires image data generated by the CPU 1212 into a frame buffer or the like provided in the RAM 1214 or into itself, and causes the image data to be displayed on the display device 1218.

The communication interface 1222 communicates with other electronic devices via a network. The storage device 1224 stores programs and data used by the CPU 1212 in the computer 1200. The DVD drive reads programs or data from a DVD-ROM or the like and provides them to the storage device 1224. The IC card drive reads programs and data from an IC card and/or writes programs and data to an IC card.

ROM 1230 stores therein a boot program, etc., executed by computer 1200 upon activation, and/or a program that depends on the hardware of computer 1200. I/O chip 1240 may also connect various I/O units to I/O controller 1220 via USB ports, parallel ports, serial ports, keyboard ports, mouse ports, etc.

The programs are provided by a computer-readable storage medium such as a DVD-ROM or an IC card. The programs are read from the computer-readable storage medium, installed in storage device 1224, RAM 1214, or ROM 1230, which are also examples of computer-readable storage media, and executed by CPU 1212. The information processing described in these programs is read by computer 1200, and brings about cooperation between the programs and the various types of hardware resources described above. An apparatus or method may be constructed by realizing the operation or processing of information according to the use of computer 1200.

For example, when communication is performed between computer 1200 and an external device, CPU 1212 may execute a communication program loaded into RAM 1214 and instruct communication interface 1222 to perform communication processing based on the processing described in the communication program. Under the control of CPU 1212, communication interface 1222 reads transmission data stored in a transmission buffer area provided in RAM 1214, storage device 1224, a DVD-ROM, or a recording medium such as an IC card, and transmits the read transmission data to the network, or writes received data received from the network to a reception buffer area or the like provided on the recording medium.

The CPU 1212 may also cause all or a necessary portion of a file or database stored in an external recording medium such as the storage device 1224, a DVD drive (DVD-ROM), an IC card, etc. to be read into the RAM 1214, and perform various types of processing on the data on the RAM 1214. The CPU 1212 may then write back the processed data to the external recording medium.

Various types of information, such as various types of programs, data, tables, and databases, may be stored in the recording medium and may undergo information processing. The CPU 1212 may perform various types of processing on the data read from the RAM 1214, including various types of operations, information processing, conditional judgment, conditional branching, unconditional branching, information search/replacement, etc., as described throughout this disclosure and specified by the instruction sequence of the program, and writes back the results to the RAM 1214. The CPU 1212 may also search for information in a file, database, etc. in the recording medium. For example, when multiple entries each having an attribute value of a first attribute associated with an attribute value of a second attribute are stored in the recording medium, the CPU 1212 may search for an entry whose attribute value of the first attribute matches a specified condition from among the multiple entries, read the attribute value of the second attribute stored in the entry, and thereby obtain the attribute value of the second attribute associated with the first attribute that satisfies a predetermined condition.

The above-described programs or software modules may be stored in a computer-readable storage medium on the computer 1200 or in the vicinity of the computer 1200. In addition, a recording medium such as a hard disk or RAM provided in a server system connected to a dedicated communication network or the Internet can be used as a computer-readable storage medium, thereby providing the programs to the computer 1200 via the network.

The blocks in the flowcharts and block diagrams in this embodiment may represent stages of a process in which an operation is performed or "parts" of a device responsible for performing the operation. Particular stages and "parts" may be implemented by dedicated circuitry, programmable circuitry provided with computer-readable instructions stored on a computer-readable storage medium, and/or a processor provided with computer-readable instructions stored on a computer-readable storage medium. The dedicated circuitry may include digital and/or analog hardware circuits and may include integrated circuits (ICs) and/or discrete circuits. The programmable circuitry may include reconfigurable hardware circuits including AND, OR, XOR, NAND, NOR, and other logical operations, flip-flops, registers, and memory elements, such as, for example, field programmable gate arrays (FPGAs) and programmable logic arrays (PLAs).

A computer-readable storage medium may include any tangible device capable of storing instructions that are executed by a suitable device, such that a computer-readable storage medium having instructions stored thereon comprises an article of manufacture that includes instructions that can be executed to create means for performing the operations specified in the flowchart or block diagram. Examples of computer-readable storage media may include electronic storage media, magnetic storage media, optical storage media, electromagnetic storage media, semiconductor storage media, and the like. More specific examples of computer-readable storage media may include floppy disks, diskettes, hard disks, random access memories (RAMs), read-only memories (ROMs), erasable programmable read-only memories (EPROMs or flash memories), electrically erasable programmable read-only memories (EEPROMs), static random access memories (SRAMs), compact disk read-only memories (CD-ROMs), digital versatile disks (DVDs), Blu-ray disks, memory sticks, integrated circuit cards, and the like.

The computer readable instructions may include either assembler instructions, instruction set architecture (ISA) instructions, machine instructions, machine-dependent instructions, microcode, firmware instructions, state setting data, or source or object code written in any combination of one or more programming languages, including object-oriented programming languages such as Smalltalk (registered trademark), JAVA (registered trademark), C++, etc., and conventional procedural programming languages such as the "C" programming language or similar programming languages.

The computer-readable instructions may be provided to a processor of a general-purpose computer, special-purpose computer, or other programmable data processing apparatus, or a programmable circuit, either locally or over a local area network (LAN), a wide area network (WAN), such as the Internet, etc., so that the processor of the general-purpose computer, special-purpose computer, or other programmable data processing apparatus, or the programmable circuit, executes the computer-readable instructions to generate means for performing the operations specified in the flowcharts or block diagrams. Examples of processors include computer processors, processing units, microprocessors, digital signal processors, controllers, microcontrollers, etc.

The present invention has been described above using an embodiment, but the technical scope of the present invention is not limited to the scope described in the above embodiment. It is clear to those skilled in the art that various modifications and improvements can be made to the above embodiment. It is clear from the claims that forms incorporating such modifications or improvements can also be included in the technical scope of the present invention.

The order of execution of each process, such as operations, procedures, steps, and stages, in the devices, systems, programs, and methods shown in the claims, specifications, and drawings is not specifically stated as "before" or "prior to," and it should be noted that the processes may be performed in any order, unless the output of a previous process is used in a later process. Even if the operational flow in the claims, specifications, and drawings is explained using "first," "next," etc. for convenience, it does not mean that it is essential to perform the processes in that order.

10 System, 20 Core network, 30 Wireless base station, 40 PMS, 50 DataLake/DWH, 100 Wireless communication terminal, 102 Memory unit, 104 Communication unit, 106 Setting unit, 108 Control unit, 110 Deletion unit, 120 Determination unit, 300 Wireless communication terminal, 1200 Computer, 1210 Host controller, 1212 CPU, 1214 RAM, 1216 Graphic controller, 1218 Display device, 1220 Input/output controller, 1222 Communication interface, 1224 Storage device, 1230 ROM, 1240 Input/output chip

Claims (9)

A wireless communication terminal,
A program for executing a deletion procedure for deleting a GUTI acquired from a core network and stored in a memory unit before transmitting a connection request to a core network when implementing FOTA (Firmware Over the Air). The program according to claim 1, wherein the deletion procedure deletes the GUTI stored in the storage unit when the wireless communication terminal is restarted after a user operation of the FOTA is performed. The wireless communication terminal includes:
The program according to claim 1 or 2, for executing a control procedure for controlling transmission of a connection request including an IMSI of the wireless communication terminal to the core network after the GUTI is deleted by the deletion procedure. The wireless communication terminal,
4. The program according to claim 3, for causing the program to execute a notification procedure of notifying the core network of the IMEISV of the wireless communication terminal by a Security Mode Complete message in response to receiving a Security Mode Command message from the core network after the connection request is transmitted to the core network by control in the control procedure. The program according to any one of claims 1 to 4, wherein the wireless communication terminal is a terminal that complies with 3GPP (3rd Generation Partnership Project). The wireless communication terminal is a terminal conforming to an LTE (Long Term Evolution) communication method,
The program according to claim 5 , wherein the connection request is an Attach Request. The wireless communication terminal is a terminal conforming to a 5G (5th Generation) communication method,
the connection request is a Registration Request,
The program according to claim 5 , wherein the deletion procedure deletes the 5G GUTI stored in the storage unit. 1. A method performed by a wireless communication terminal, comprising:
A storage step of storing the GUTI acquired from the core network in a storage unit;
a deletion step of deleting the GUTI stored in the storage unit before transmitting a connection request to the core network when implementing FOTA (Firmware Over the Air);
a sending step of sending a connection request including an IMSI of the wireless communication terminal to the core network after deleting the GUTI . A wireless communication terminal,
A storage unit that stores the GUTI acquired from the core network;
a deletion unit that deletes a GUTI stored in the storage unit before transmitting a connection request to the core network when implementing FOTA (Firmware Over the Air);
a communication unit that transmits a connection request including an IMSI of the wireless communication terminal to the core network after the GUTI is deleted by the deletion unit.

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