JP2003060560A - Radio communication apparatus, server device, radio communication method and radio communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mechanism wherein storage devices can be used effectively by virtually increasing storage capacity necessary for execution of software in a portable telephone by using network via radio. SOLUTION: When a user obtains storage devices, shortage of storage devices is detected with a detecting means 101, and an escape region capable of escaping is obtained in a server device 2 with an escape region obtaining means 102. Contents in the obtained escape region are transmitted to the server device 2 with a communication means 103, and a region 11 which is not yet used is enlarged with an escape region restoring means 108. The server device 2 stores the contents of the escape region which are received with a communication means 200, in a storage means 204 of the server device. When a user restores a storage device, the contents of the escape region are transmitted from the storage means 204 to radio communication apparatus 1 by using the communication means 200, and the contents of the escape region which are received with the communication means 103 are arranged again in a storage device block.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication system connected via a wireless network, a wireless communication device, a server device, and a wireless communication method used for the wireless communication system.

[0002]

2. Description of the Related Art In recent years, network computing using mobile phones has become widespread. Internet or E
Functions such as e-mail can be used on mobile phones, mobile phones are becoming more multifunctional, and software that realizes those functions can be downloaded via the Internet.
Mobile phones are required to have the same high functionality and high performance as personal computers.

[0003]

[Problems to be Solved by the Invention] Higher functionality of mobile phones
In order to achieve high performance, it is necessary to run a lot of software on mobile phones. To implement such software, a large-capacity storage device that holds the software and data is required. However, it is extremely difficult to mount a hard disk device or a large-capacity memory device due to the restriction of ensuring the portability of the mobile phone, and there is a limit to the expansion of the memory. An object of the present invention is to provide a mechanism for virtually increasing the storage capacity required for executing software by using a wireless network so that the memory of a mobile phone can be effectively used.

[0004]

To achieve the above object, in a wireless communication system comprising a plurality of information communication devices having wireless communication means and at least one server device according to the present invention, a wireless communication device ( The following device) is a memory acquisition unit that acquires a memory area from an unused area of the storage device when the memory is used for program execution or program use, and the capacity of the unused area of the memory when the memory is acquired. A detection unit that detects a shortage, a save area acquisition unit that acquires a save area that can be saved from the memory area in use when a shortage of space is detected, a transmission function that sends the contents of the save area to the server device, and A communication unit having a receiving function for receiving the contents of the save area via the network, and the contents of the save area received by the communication unit are stored in the storage device. And rearrangement means for arranging the use region, and confirmation means for obtaining a confirmation to the user whether to transmit the contents of the save area to the server apparatus via the network,
The server device (hereinafter referred to as a server) includes a save area restoring unit that adds the save area to an unused area of the storage device, and the server device (hereinafter referred to as a server) has a receiving function and wireless communication for receiving the contents of the save area transmitted by the wireless communication device via the network. Communication means having a transmission function for transmitting the contents of the save area saved in the storage device to the wireless communication device in response to the request of the device, save position determining means for determining the save position for the contents of the save area, and the save position The storage means stores the contents of the save area in a storage device.

With this configuration, the function of effectively utilizing the storage capacity of the mobile phone, which is the object of the present invention, operates as follows. The wireless communication device acquires the memory area required for executing the program by the memory acquisition means.
At this time, the detection unit detects whether or not the capacity of the unused area of the memory is insufficient, and when it is detected that the capacity is insufficient, the save area acquisition unit stores the contents in the server device in the memory area being used. The evacuation area in which the evacuation area can be saved is found, the content is acquired, and the content of the evacuation area and the identifier of the wireless communication device are transmitted to the server device by the transmission function of the communication means. At this time, the confirmation means confirms with the user whether or not the contents of the save area can be sent to the server device, and the save area restoring means adds the save area saved in the server device to the unused area of the storage device. The memory acquisition unit acquires the memory area required for executing the program again.

The server device receives the contents of the save area sent from the wireless communication device by the receiving function of the communication means, and the save position determining means determines the contents of the save area in the storage device in the server from the identifier of the wireless communication device. The storage location is determined, and the contents of the save area are stored in the storage location of the storage means of the server device. When the wireless communication device is requested to restore the contents of the save area, the save position determining unit acquires the save position, and the transmitting function of the communication unit wirelessly transfers the contents of the save area saved in the storage device of the server device. Send to communication device. The wireless communication device receives the contents of the save area sent by the server device by the receiving function of the communication means, and arranges the contents of the save area in the unused area of the storage device by the rearrangement means. With the above operation, the storage area in the wireless communication device can be effectively used when the user tries to execute the program.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configurations of a wireless communication device, a server device, and a wireless communication system according to an embodiment of the present invention. The wireless communication device 1 and the server device 2 are shown in FIG.
Composed of and. The wireless communication device 1 is used when executing a program or as a work area of the program, and includes a memory 10 including a used area 12, an unused area 11 and a management table 215 (described later), and the memory 10 for executing the program. A memory acquisition unit 100 for acquiring a required memory, and a memory capacity required by a user in the memory acquisition unit 100 is set as an unused area 1 of the memory 10.
No. 1 detection means 101 for detecting that it cannot be acquired due to memory shortage, and when the detection means 101 detects memory shortage, the usage information of the in-use area 12 of the memory 10 is referred to the information of the management table 215. Then, a save area acquisition unit 102 for acquiring a memory block that can be saved in the server device 2 (hereinafter referred to as a save area), and a transmission function for sending the contents of the save area and the identifier of the wireless communication device 1 to the server device 2 Communication means 103 having 104, save area restoring means 108 for initializing the save area acquired by the save area acquiring means 102 and adding it to the unused area 11 of the memory 10, and receiving for receiving the save area from the server device 2. The communication means having the function 105 and the save area are stored in the memory 10
The memory block is acquired from the unused area 11 of the memory 10 and stored in the save area, and the used area 1
2 and rearrangement means 107, and when the transmission function 104 of the communication means 103 operates, confirmation means for confirming to the user whether or not the save area may be sent to the server device. .

The server device 2 includes a communication means 200 having a receiving function 201 for receiving the save area sent by the communication means 103 of the wireless communication device 1 and the identifier of the wireless communication device 1,
A storage position determining unit 203 that determines a storage position on the storage device in the server device using the identifier of the wireless communication device 1 received by the communication unit 200, and an evacuation area received by the communication unit 200 as the storage position. Storage means 204 for storing
And a communication means 200 having a transmission function 202 for transmitting again the save area saved in the storage means 204 to the wireless communication apparatus according to a request from the wireless communication apparatus 1, and an save area management table 205 managing the save area. To be done.

First, the memory 10 will be described with reference to FIG. The memory 10 includes a plurality of memory blocks (210-2
14) and a management table 215. The memory blocks (210 to 214) are composed of a block ID 15 which is an identifier of a memory block, and a storage area 16 which holds information stored in the memory block.
In FIG. 2, the block ID 15 and the storage area 16 are each 1
One memory block (210 to 210)
214). The block ID 15 is an identifier unique to each of all the memory blocks included in the memory 10. By designating one of the block IDs 15, any of the memory blocks (210 to 214) is selected.

Next, the management table 215 will be described with reference to FIG. The management table 215 has memory blocks (2
10 to 214), and is composed of a plurality of management information (230 to 234). Management information (2
30-234) are the memory blocks (210-21).
It corresponds to 4) on a one-to-one basis. Management information (230-234)
Is a block ID 220 that stores an identifier that identifies which memory block the management information is, and the storage area 1 of the corresponding memory block (210 to 214).
A block size 221 that holds the storage capacity of 6;
Usage information 222 that stores information indicating whether or not the memory block is currently used, elapsed time 223 that indicates how long time has elapsed since the start of use of the memory block, and the corresponding memory When the block information is once saved in the server device 2, it is composed of a server save ID 224 that identifies the save area.

In FIG. 3, the block ID 220, the block size 221, the usage information 222, the elapsed time 223, and the server evacuation ID 224 are grouped one by one in the column direction and treated as one management information (230 to 234). Block ID 2
20 has a one-to-one correspondence with the block ID 15 in FIG.
Which management information (2
30 to 234) is information to determine whether to associate.
The block size 221 is information in which the storage capacity of the storage area 16 of the memory block (210 to 214) in FIG. The block size 221
Describes the size of the storage area 16 in a unit indicating the amount of storage, such as a bit unit (1 bit unit) or a byte unit (8 bit unit). The usage information 222 holds information as to whether or not the memory block (210 to 214) is currently used in the wireless communication device 1, and has a logical value such as true / false.
Any information can be used as long as it can represent the presence or absence of use by a numerical value such as 0/1 or a character string such as USED / UNUSED. If this information means that it is in use, it is treated as information that the memory block may be saved in the server device 2.

The elapsed time 223 represents a total elapsed time from the start of use of the corresponding memory block in the wireless communication device 1, and is a numerical value representing a total time when a certain time is 0, and is updated with the passage of time. This is the information to be provided. It is treated as information that the larger this numerical value is, the more the memory block may be saved in the server device 2. The server save ID 224 is an identifier for identifying a corresponding memory block when it is saved in the server device 2 once. The server save ID 224 may be a numerical value, character string, or empty information unique to each memory block. If a numerical value or character string is described, it indicates that the memory block is stored in the server device 2, and empty information If so, it means that the memory block is not stored in the server device 2.

Next, an example of the management information (230 to 231) recorded in the management table 215 will be described. The management information 230 includes a block ID “1” and a block size “1”.
This is information having “0”, usage information “1”, elapsed time “10”, and server save ID “SW1”. Block ID "1"
The management information 230 is the memory block 21 of the memory 10.
Indicates that the information is for 0. Block size "1
“0” indicates that the capacity of the storage area 16 of the memory block 210 is 10 units. The usage information “1” and the elapsed time “10” indicate that the memory block 210 is currently used by the program operating in the wireless communication device 1 and 10 units have elapsed from the start of use. The server save ID “SW1” indicates that the memory block 210 has been saved in the server device 2 once, and the identifier thereof is “SW1”. Management information 23
1 is a block ID “2”, a block size “20”,
Usage information "0", elapsed time "0", server save ID
This is information having "-". The block ID “2” indicates that the management information 231 is information for the memory block 211 of the memory 10. The block size "20" is
The storage area 16 of the memory block 211 has a capacity of 20 units. Usage information "0", elapsed time "0"
Indicates that the memory block 211 is currently unused in the wireless communication device 1. The server save ID “−” indicates that the memory block 211 has never been saved in the server device 2 before. In this way, the management information (23
0 to 234), the used area 1 of the memory 10
2 and the unused area 11 can be distinguished, and management such as acquisition and addition of memory can be performed.

Next, the save area management table 205 of the server device 2 will be described with reference to FIG. The save area management table 205 includes a plurality of save area management information (320 to 32).
1). Save area management information (320 to 32)
1) is associated with the server evacuation ID of the management information (230 to 234). Evacuation area management information (320-3
21) is a server save ID 310 that is an identifier for identifying a save area saved in the storage device of the server device 2, a save position 311 that indicates where in the storage device of the server device 2 the save area is saved, and the save Area size 312
Composed of and. In FIG. 4, the server evacuation ID 31
0, storage position 311 and size 312 are grouped one by one in the column direction and one save area management information (320 to 321)
Treat as. The server save ID 310 is the management information (230
~ 234), the server save ID is an identifier for identifying the save area saved in the storage device of the server apparatus 2.
224. The storage location 311 is information indicating where in the storage device of the server device 2 the save area is saved, and is information that is uniquely created from the server save ID and the identifier of the wireless communication device. It is possible to know which memory block of which wireless communication device is stored in the storage device by analyzing the storage position 311. The size 312 is numerical information indicating the size of the save area. The size 312 describes the size of the storage area 16 in a unit indicating the amount of storage, such as a bit unit (1 bit unit) or a byte unit (8 bit unit).

Next, an example of the save area management information (320 to 321) recorded in the save area management table 205 will be described. The save area management information 320 is the server save ID
"SW1", storage location "SW1_ID1", size "1"
This is information having "0". The save area management information 320 is the management table 21 referred to by the server save ID “SW1”.
Block ID associated with the management information 230 of No. 5
It can be seen that the memory block 210 of “1” is saved in the server device 2 as a save area. Storage position 311 "SW1
“_ID1” is the identifier of the wireless communication device 1,
SW1 is information that refers to the memory block 210,
It is used as a file name or a directory name in a file system on a storage device of the server device 2 (for example, a mass storage device such as a hard disk, memory, DVD-RAM, MO). The size 312 refers to the block size 221 representing the size of the memory block 210 and indicates that the size of the save area saved in the server device 2 is “10”. That is, the storage area 16 of the memory block 210 is located at the position “SW1_I” on the storage device of the server device 2.
It is stored in D1 ”.

Next, the operation of efficiently using the memory when the user uses the memory in the wireless communication device 1 in the embodiment of the present invention will be described with reference to FIG. First, when the user performs an operation such as activating the wireless communication device 1 (1000) and activating a program or the like, a memory for storing the program and a memory used by the program are requested (1001). The management information (230 to 234) is sequentially acquired from the management table 215, and the block size 221 of the memory block whose usage information is unused.
To obtain the unused area capacity (1002),
The requested amount of memory and the unused area capacity are compared (1
003). If it can be acquired, the memory blocks whose usage information is unused (from 210 to 214) are sequentially acquired, and the memory blocks are used for activating a program (1009). Then, the usage information 22 of the management information (230 to 234) corresponding to the used memory block
Write "use" information in 2 and set elapsed time to 0 (101
0) End (1011).

If the amount of memory requested in step 1003 is larger than the unused area capacity and the memory cannot be acquired, saveable area acquisition processing 11
00 to obtain a memory block that can be saved in the server device 2. Then, before transmitting the memory block to the server device 2 as a save area, the user is notified of that fact (1004), and if the user does not permit the transmission, the memory acquisition is abandoned and the process ends (1011). . If the user permits the transmission, the server save ID 224 (here, “SW1”) of the management information (230 to 234) is created, and then the identifier (here, “ID1”) of the wireless communication device 1 is stored.
The server evacuation ID 224 is transmitted to the server device 2 by the communication means 103 (1006), and the memory block obtained in step 1100 is transmitted to the server device 2 by the communication means 103 (1007).

Next, with respect to the management information (230 to 234) corresponding to the sent memory block, "unused" information is written in the usage information 222 and "0" is written in the elapsed time,
In the server save ID 224, the identifier "SW" for the save area
“1” is written (1008) and the process returns to step 1002 to acquire the unused area again. In the server device 2, first, the server device 2 is activated (2000) and waits for a connection from the wireless communication device 1 (2001). Communication protocols are TCP / IP and UD used on the Internet
Any communication protocol such as P / IP or a wireless communication protocol such as Bluetooth may be used. In short, a protocol that allows data transmission and reception between the wireless communication device 1 and the server device 2 is used. If not connected (2002), the process returns to the standby for connection (2001).

When the wireless communication device 1 is connected to the server device 2, the wireless communication device identifier (here, "ID1") and the server evacuation ID (here, "SW1") sent at step 1006 are received ( 2003), subsequently, the wireless communication device 1 receives the memory block sent in step 1007 as a save area (2004). Next, step 2
Wireless communication device identifier and server save ID received in 003
The storage position is determined from and (2005). The determination method is, for example, the identifier “ID1” of the wireless communication device and the server save I
D "SW1" may be concatenated as a character string, or may be determined as a numerical value using a hash table. Next, the save area received in step 2004 is set to the server device 2
The data is stored in the storage device of (1) in the storage location determined in step 2005 (2006).

As the storage device, a large-capacity storage medium such as a hard disk, a memory, an MO or a DVD can be used. The storage position is information indicating a physical or logical position on the mass storage medium. Next, the save area management table 2
05 new save area management information (320-32
1) is created and the server save ID 31 of the save area management information is created.
0 server save ID 224 received in step 2003
The storage location created in step 2005 is stored in the storage location 311 and the reception capacity of the save area received in step 2004 is recorded in the size 312.
05 (2007). Then, waiting for connection is started again (2001).

Next, step 11 for acquiring the saveable area
The operation of 00 will be described with reference to FIG. First, when acquiring a memory block that can be saved (1100), the requested amount of memory is acquired (1101), and the management information (230 to 234) of the management table 215 is sequentially acquired (110
2), the block size 221 is acquired (1103).
If the block size is not equal to or larger than the memory request amount acquired in step 1101 (1104), it is determined that the memory block corresponding to the management information cannot be used, and the process returns to step 1102 to return to the next management information (230 to 23).
4) is acquired. If the block size is equal to or larger than the memory request amount acquired in step 1101, then the usage information 222 is acquired from the management information (1105), and if the information indicates that it is not used (1106), the management information is acquired. It is determined that the memory block corresponding to the save area cannot be used as the save area, and the process returns to step 1102 and the next management information (2
30-234) is acquired. If it is in use, the elapsed time 223 is acquired from the management information (1107).

Of the elapsed times acquired so far, the maximum value is compared with the elapsed time 223, and if the elapsed time is smaller (1108), it is determined that the time has not elapsed much since the memory was first used. Then, the process returns to step 1102 to acquire the next management information (230 to 234). If it is large, save a new server as a candidate for the save area.
Create unique ID information (1109),
The memory blocks (210 to 214) indicated by the management information (230 to 234) are acquired, and the process ends. With the operation of the functions as described above, the wireless communication device 1 can realize the function of efficiently acquiring the memory block satisfying the capacity requested by the user.

Next, the operation of the wireless communication device 1 in the embodiment of the present invention when the user tries to restore the memory by ending the program will be described with reference to FIG. First, the wireless communication device 1 is activated (1050), the user accepts a request to restore the memory due to termination of a program (1051), and a memory block to be restored when a memory restore request is issued (210 to 210). 214)
Server save ID from management information (230-234) for
224 (here, “SW1”) is acquired, and the server save ID 224 is transmitted to the server device 2 (105
2). Next, the identifier of the wireless communication device 2 (here, “ID
1 ") is transmitted to the server device 2 (1053), and the save area requested by the server device 2 and the size 312 of the save area are received (1054).

Next, in order to secure the size 312 of the received save area, the above-mentioned memory securing function of the wireless communication device 1 is executed to obtain a memory block capable of storing the save area (1000). Next, the save area received in step 1054 is arranged in the memory block acquired in step 1000 to restore the save area (1055), and the management information (230 to 234) corresponding to the memory block is acquired. The usage information 222 of the acquired management information (230 to 234) is set to the “used” state, the elapsed time 223 is set to “0”,
Update the server evacuation ID to "empty information" (105
6) and the process is terminated (1057).

After starting the server device 2 (2050),
It waits for reception of the server evacuation ID 224 (here, "SW1") sent from the wireless communication device 1, and waits for connection of the wireless communication device 1 (2051). If there is no connection (205
2) Return to step 2051 and wait until connection is established. When the connection is awaited, the identifier (here, “ID1”) of the wireless communication device 1 transmitted in step 1053 is received (2053). The server evacuation ID “ID1” received in steps 2051 and 2053 and the identifier “SW” of the wireless communication device 1
1 ”, the save area management information (320 to 321) stored in the save area management table 205 is searched, and the save area management information that matches the condition is acquired. Then, the save location 311 and the size 312 of the save area management information (320 to 321) are acquired, and the save area is acquired from the storage device of the server device 2 (2054).

Next, in step 20 for the wireless communication device 1.
The save area acquired in step 54 and the size 312 are transmitted to the wireless communication device 1 (2055), the save area management information acquired in step 2054 is deleted from the save area management table, and the process returns to step 2051 to reconnect. Wait for (2051). By operating each unit in this manner, it is possible to realize a function of restoring the contents of the memory block in the wireless communication device 1 when the user tries to restore the memory by ending the program.

[0027]

As described above, according to the present invention,
A function that efficiently uses the memory when the user uses the memory in a wireless communication device such as a mobile phone, and restores the contents of the memory block when the user tries to restore the memory when the program ends. It is possible to realize the function to perform, and to realize the mechanism that the memory of the mobile phone can be effectively used by virtually increasing the storage capacity required for executing the software by using the wireless network.

[Brief description of drawings]

FIG. 1 is a block diagram of a wireless communication device, a server, and a wireless communication system according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a memory configuration according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram of a management table according to an embodiment of the present invention.

FIG. 4 is an explanatory diagram of a save area management table according to an embodiment of the present invention.

FIG. 5 is a flow chart of an operation of saving a memory block of a wireless communication device in a server device according to an embodiment of the present invention.

FIG. 6 is an operation flow diagram in the case of restoring a memory block saved in a server device according to an embodiment of the present invention.

FIG. 7 is a flowchart of an operation of acquiring a memory block saved in the server device according to the embodiment of the present invention.

[Explanation of symbols]

1 ... wireless communication device, 2 ... server, 10 ... memory, 215 ... Management table, 205 ... Evacuation area management table, 1000 ... Saving process of memory block of wireless communication device, 1050 ... Return processing of the memory block of the wireless communication device, 1100 ... Acquisition processing of a save area of a wireless communication device, 2000 ... Saving process of save area of server device, 2050 ... Return processing of the save area of the server device.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Tomoya Ozaki             292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa             Ceremony Hitachi Digital Media Development Book             Department F-term (reference) 5B060 AA06 AA09 AA12                 5K067 BB04 DD17 EE02 EE16 FF05                       HH23 KK15

Claims (8)

[Claims] 1. A wireless communication device used in a wireless communication system in which a plurality of wireless communication devices and a server device are connected via a wireless network, wherein the wireless communication device does not use a storage device when a memory is used. A memory acquisition unit that acquires an area, a detection unit that detects insufficient capacity of an unused area, and a save area acquisition unit that acquires a save area that can be saved from the memory area that is being used when insufficient capacity is detected. A radio having a communication means having a transmission function for transmitting the contents of the save area to a server device via a network, and save area restoring means for adding the save area to an unused area of a storage device. Communication device. 2. A wireless communication device used in a wireless communication system in which a plurality of wireless communication devices and a server device are connected via a wireless network, wherein the wireless communication device does not use a storage device when the memory is used. A memory acquisition unit that acquires an area, a detection unit that detects insufficient capacity of an unused area, and a save area acquisition unit that acquires a save area that can be saved from the memory area that is being used when insufficient capacity is detected. A communication means having a transmitting function for transmitting the contents of the save area to a server device via a network and a receiving function for receiving the contents of the save area; and a save area for adding the save area to an unused area of a storage device. A wireless communication apparatus comprising: a restoring unit and a rearrangement unit that rearranges the contents of the save area received by the communication unit in a storage device. 3. The wireless communication device according to claim 1, wherein the wireless communication device asks the user whether to transmit the contents of the save area to the server device via the network. A wireless communication device, comprising: a confirmation unit for ascertaining. 4. A server device used in a wireless communication system in which a plurality of wireless communication devices and a server device are connected via a wireless network, wherein the server device is a save area transmitted by the wireless communication device via the network. And a communication function having a receiving function for receiving the contents of the evacuation area and a transmission function for transmitting the contents of the evacuation area stored in the storage device to the wireless communication device in response to a request from the wireless communication device, and a storage position for the contents of the evacuation area. A server device comprising: a storage position determining means for determining and a storage means for storing the contents of the save area in the storage position of the storage device. 5. The server device according to claim 4, wherein the storage position determining means uniquely determines a storage position for the contents of the save area from an identifier unique to the wireless communication device. 6. In a wireless communication system in which a plurality of wireless communication devices and a server device are connected via a wireless network, the wireless communication device obtains an unused area of a storage device when using the memory. Means, a detection means for detecting a lack of capacity in the unused area, and a save area acquisition means for acquiring a save area that can be saved from the memory area in use when a shortage of capacity is detected. When necessary, the contents of the save area are sent to the server device via the network to save the contents and the save area is added to the unused area of the storage device, and the server device connects the wireless communication device via the network. Receives the contents of the save area, saves it in the storage device of the server, and sends the saved contents of the save area to the wireless communication device in response to the request from the wireless communication device. Wireless communication system according to claim Rukoto. 7. In a wireless communication method in a wireless communication system in which a plurality of wireless communication devices and a server device are connected via a wireless network, the wireless communication device uses an unused area of a storage device when using a memory. Steps to acquire, a step to detect insufficient capacity of unused areas, a step to acquire a save area that can be saved from the memory area in use when insufficient capacity is detected, a save area via a network And a step of adding the save area to an unused area of the storage device. 8. The wireless communication method according to claim 7, wherein the wireless communication device has a step of asking a user to confirm whether or not to transmit the contents of the save area to the server device via the network. And a wireless communication method.