JP2003218974A - Wireless communication method and wireless communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless communication method and a wireless communication system between wireless communication networks for enabling a data receiver side to browse data even when the attribute of data processed by a data transmitter side differs from that processed by the data receiver side. <P>SOLUTION: When a wireless transmitter 1 transmits data with a first data attribute and a wireless receiver 3 can process only data with a second data attribute, the wireless transmitter 1 transfers the data with the first data attribute to a wireless relaying apparatus 1 capable of converting the data with the first data attribute into data with the second data attribute. After the wireless relaying apparatus 1 converts the data having the first data attribute and received from a wireless transmitter 2 into the data with the second data attribute and transmits the converted data to the wireless receiver 3. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication method and a wireless communication system, and more particularly to a wireless communication side for transmitting data when transmitting and receiving data between a plurality of wireless communication devices forming a wireless communication network. Wireless communication that enables data transfer between wireless communication networks and enables data viewing on the data receiving device side, even if the data attributes that can be processed are different between the communication device and the wireless communication device receiving data A method and a wireless communication system.

[0002]

2. Description of the Related Art Conventionally, there is a technique called a wireless LAN as a technique for forming a wireless communication network between wireless communication devices. This wireless LAN realizes wireless communication by using infrared rays or radio waves instead of cables.

In recent years, Bluetooth which enables various wireless communication devices to be wirelessly connected using the 2.4 GHz band.
Short-distance wireless communication technology called h is drawing attention. For example, each person in a company has a personal computer or a portable information device (PD) equipped with a Bluetooth interface.
A) and the like) are used to form a wireless communication network, and information can be transmitted and received thereby.

In the future, any wireless communication device such as a personal computer, a portable information device (PDA), a mobile phone, a digital camera or a printer used in a company or a home will be equipped with an interface for realizing wireless communication. It is considered to be one.

However, in the case of configuring such a wireless communication network, if the data compression method of the device for transmitting data and the data decompression method of the device for receiving data are not the same, for example, data reception is performed. Data cannot be viewed on the device. For example, when the device on the data transmission side is capable of transmitting MPEG-2 data, the device on the data receiving side has only the function of reproducing only MPEG-4 data. In this case, in this receiving device, MPE
The data transmitted as G-2 data cannot be reproduced.

In order to solve such a problem, it is necessary for each device constituting the wireless network to have various data compression functions in advance so as to be compatible with various data compression methods, but this is not practical. Absent. further,
Even if it is a device that connects with a wired cable instead of wireless transmission, each device has material restrictions such as cable routing and the number of cable insertion ports, and performs data reproduction compatible with various data compression methods. Is difficult.

Therefore, as one means for solving this problem, a method disclosed in Japanese Patent Laid-Open No. 2001-110125 is known. This publication discloses a recording / reproducing method capable of converting a compression method while realizing material transfer at a speed exceeding 1 × to a recording medium. Specifically, the RA provided inside the recording / reproducing apparatus is
The compression material recorded by the first compression method recorded in the ID part is
Second time that can be internally decoded by the transcoder while playing back at 1x speed using the idle time when accessing the AID section
The method of converting to the compression method of is described.

As another method for solving the above problem, there is a method disclosed in Japanese Patent Laid-Open No. 11-341074. In this method, when transmitting information from one information terminal with a function server connected to the network to any other information terminal, the information is grasped by the terminal capacity of the receiving side information terminal according to the mutual terminal capacity. It has an information conversion function for converting into a format that allows communication, and when the information terminals to communicate with each other have different terminal capabilities, the information is converted to enable communication. This publication also describes a configuration in which the information conversion function is provided between all information terminals.

[0009]

[Patent Document 1] Japanese Unexamined Patent Application Publication No.
In the method disclosed in Japanese Patent Laid-Open No. 001-110125, it is necessary to provide a transcoder inside the recording / reproducing apparatus without fail, and when a wireless communication network such as Bluetooth is configured, the transcoder is provided in the constituent devices. If there is a device that does not exist, it will be difficult to handle. Further, since conversion by all compression methods is not possible inside the transcoder, there is a limit to the method of conversion to a compression method that can be decoded inside the transcoder.

Further, according to the method disclosed in Japanese Patent Laid-Open No. 11-341074, when the function server converts information, the function server manages data transmission / reception between information terminals. When sending and receiving, it will always go through the function server. Therefore, there is a problem of lacking flexibility in transmitting and receiving data. Furthermore, if all the information terminals are provided with an information conversion function, the devices that make up the wireless communication network will be restricted, and in the case of devices that make up the wireless communication network such as Bluetooth, this is not so realistic. Not at all.

The present invention has been made to solve the above problems, and when data is transmitted / received between a plurality of wireless communication devices (existing within a wireless communicable range) forming a wireless communication network. If the data attributes (data compression / expansion method, image size, etc.) do not match between the data transmitting device and the data receiving device, data that does not match other wireless communication devices that make up the wireless communication network We propose a method of transferring data from a data transmitting device to this wireless communication device once and converting the data attribute to a data attribute on the receiving device side when the attribute can be converted. According to this method, a wireless communication method and a wireless communication method between wireless communication networks that allow data to be browsed on the data receiving device side even if the data processing device has different data processable data attributes It is intended to provide a communication system.

[0012]

A wireless communication method according to the present invention is a wireless communication method in which data is transmitted from a wireless transmission device constituting a wireless communication network to a wireless reception device, and the first wireless transmission device is used. If the wireless receiving apparatus can process only the data having the second data attribute different from the first data attribute, the wireless transmitting apparatus transmits the data having the first data attribute to the second data attribute.
Data is transferred to a wireless relay device capable of converting into data with the data attribute of, and the data of the first data attribute transmitted from the wireless transmission device in this wireless relay device is converted into data of the second data attribute. After that, the data is transmitted to the wireless receiving device.

Further, in the wireless communication system according to the present invention, in the wireless communication system in which data is transmitted from the wireless transmission device forming the wireless communication network to the wireless reception device, the wireless transmission device has the first data attribute. When data is transmitted and the wireless reception device can process only the data of the second data attribute different from the first data attribute, the data of the first data attribute is converted into the data of the second data attribute. When a wireless relay device that can be used is present in the wireless communication network, the wireless transmission device transfers the data to the wireless relay device, and the wireless relay device transfers the data having the first data attribute transmitted from the wireless transmission device to the second wireless relay device. The data is transmitted to the wireless receiving device after being converted into the data having the data attribute.

That is, according to the wireless communication method and the wireless communication system of the present invention, when data is transmitted / received between a plurality of wireless communication devices forming a wireless communication network, even if the data attributes are different between the transmitting side and the receiving side. , If the other wireless communication devices that make up this wireless communication network are capable of converting to data of this different data attribute, by transferring the data once to this wireless communication device, the data of the data attribute of the receiving side Convert to. As a result, even data having different data attributes can be transferred between wireless communication networks and can be browsed by the wireless communication device on the data receiving side.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

First, the concept of the radio communication system according to the embodiment of the present invention will be described with reference to FIG.

This system shows an example in which a personal computer (hereinafter referred to as a personal computer) 1 to 3 constitutes a wireless communication system. These personal computers 1
3 to 3 each have a wireless communication function (interface) of Bluetooth, which form a wireless communication network (piconet) 4 and can perform short-distance wireless communication ad hoc with each other.

In the example shown in FIG. 1, the personal computer 1 is provided with a Bluetooth wireless communication function inside the main body, and wireless communication is performed via the antenna section 5. In addition, the PCs 2 and 3 have P which has a Bluetooth wireless communication function.
C card 8 is inserted in the slot of the main body,
Wireless communication is performed via the antenna unit 5 provided on the C card 8.

Each of the personal computers 1 to 3 is provided with an LED (Light Emitting Diode) 6 which is a light emitting element and a buzzer 7 which is a sound generator. The LED 6 and the buzzer 7 are used to indicate the position where the personal computer is located when the personal computer is within the wireless communicable area to the user of another personal computer.

Further, each personal computer has a display 9
Is provided for displaying data to be processed on each personal computer and displaying various setting screens, and the user performs various operation settings while viewing this screen.

In the example described with reference to FIG. 1, the number of devices forming the wireless communication network is described as an example of three personal computers, but in the present invention, the number of devices forming the wireless communication network is particularly large. It is not limited. Further, with regard to the devices that make up this wireless communication network, in addition to personal computers, any device that can send and receive data via Bluetooth, such as portable information devices (PDAs), mobile phones, digital cameras, printers, etc. Any device may be used.

Here, for example, in the personal computers 1 to 3 constituting the wireless communication network shown in FIG. 1, the personal computer 2 (radio transmitter) to the personal computer 3 (radio receiver).
A method of transmitting and receiving data will be described by taking the case of transmitting data as an example.

For example, when the personal computer 2 has only the function of transmitting MPEG-2 data and the personal computer 3 has only a decoder capable of reproducing MPEG-4 data, the conventional method is used. Even if data is directly transmitted from the personal computer 2 to the personal computer 3, the personal computer 3 cannot reproduce the MPEG2 data transmitted from the personal computer 2.

Therefore, in the present invention, the personal computer 1
By providing the following configuration to the (wireless relay device), the data transmitted from the personal computer 2 is once received by the personal computer 1, and the data conversion is performed according to the data attribute that can be processed by the personal computer 3, and then the personal computer 3 is converted. By transmitting the data, the personal computer 3 can browse the data transmitted from the personal computer 2.

Here, regarding the internal structure of the personal computer 1,
This will be described with reference to FIG.

As shown in FIG. 2, the personal computer 1 is internally provided with a wireless communication unit 11, a communication path management unit 13, a data attribute management unit 15, and a data processing unit 17.

First, the wireless communication unit 11 has a Bluetooth wireless communication function and performs wireless data communication. The communication path management unit 13 manages, for example, a data reception source, a transmission destination, a data relay route, and the like when transmitting and receiving data between the wireless communication devices that form the wireless communication network including the personal computer 1. It is for.
The data attribute management unit 15 manages data attributes that can be transmitted / received by a wireless communication device within the wireless communication range, attributes of data that can be received by the device itself, and attributes of data when converting and transmitting received data. It is for. The data processing unit 17 performs data conversion based on the data attributes registered in the data attribute management unit 15 of its own.

Here, although detailed description and illustration are omitted, in the personal computers 2 to 3 as well, like the personal computer 1, a wireless communication unit having a Bluetooth wireless communication function, a communication path management unit, and a data attribute management unit are provided. It is equipped.

Next, with reference to FIG. 3, a wireless communication method according to an embodiment of the present invention including the personal computer 1 configured as described above will be described.

As described above, in one embodiment of the present invention, when data is transmitted and received between wireless communication devices (for example, personal computer 2 and personal computer 3) having different data processing methods, the data is simply transmitted from personal computer 2 to personal computer 3. In this case, the personal computer 3 cannot reproduce the data transmitted from the personal computer 2.

Therefore, in the wireless communication method according to the embodiment of the present invention, by using the personal computer 1 provided with the communication path management unit 13 and the data attribute management unit 15, the personal computer 2
The data transmitted from (the wireless transmission device (data transmission terminal)) is once received by the personal computer 1 (the wireless relay device (data relay terminal)), and the personal computer 3 (the wireless reception device (the data reception terminal)) is used by the personal computer 1 It is possible to convert the data into data that can be processed, and then send the data to the personal computer 3. By using this method, the data transmitted from the personal computer 2 can be viewed on the personal computer 3.

That is, in the wireless communication method according to the embodiment of the present invention, by relaying the personal computer 1, the data transmitted in a data format that the personal computer 3 functioning as a receiving device cannot handle. Also, by converting the data stored in the data attribute management unit 15 inside the personal computer 1 into a data format compatible with the personal computer 3, the personal computer 2 can reproduce the data.

In the wireless communication method according to the embodiment of the present invention, it is possible to arrange an arbitrary number of personal computers 1 which play the role of a repeater among the devices constituting the wireless communication network. Yes, for example, in order to convert into a data attribute that can be adapted by the personal computer 3 that plays a role of receiving data, it is possible to convert and relay by a plurality of wireless communication devices that form a wireless communication network.

Here, the method of converting the data attribute, which is carried out by the personal computer 1 as the repeater, will be specifically described with reference to FIG.

FIG. 4 is for explaining one specific example of the conversion of the data compression method. For example, the personal computer 2 on the data transmitting side can transmit MPEG2 data. PC on the receiving side is M
A case where the PEG4 data can be reproduced will be described.

In this case, MPEG2 is stored inside the personal computer 1.
If the data can be converted into MPEG4 data, the personal computer 1 acts as a repeater, the MPEG-2 data transmitted from the personal computer 2 is received by the personal computer 1, and this data is transferred to the MPEG-4 data. The data transmitted from the personal computer 2 can be reproduced on the personal computer 3 by converting the data into the personal computer 3 and transmitting the data to the personal computer 3.

That is, the personal computer 2, which is a data transmission terminal, transmits Data 1-0, which is MPEG-2 data, to the personal computer 1. On the personal computer 1, Data1-0
From the MPE-2 data based on the data attributes managed by the data attribute management unit 15 and the like.
The data processing unit 17 performs conversion into G-4 data,
Received MPEG-2 data Data1-0 is M
Data1-1 which is PEG-4 data is obtained. next,
The personal computer 1 is connected to the personal computer 3 via the wireless communication unit 11 and MP
Data1-1 which is EG-4 data is transmitted. The personal computer 3 receives the MPEG-1 data Data1-1, so that the personal computer 3 receives the MPEG-2 data transmitted from the personal computer 2.
Data1-0 which is the data of No. 1 can be reproduced as Data1-1 which is the MPEG-4 data.

Next, with reference to FIG. 5, regarding the conversion processing of the data attributes shown in FIG. 4, processing methods and timings of data transmission, conversion, reproduction, etc., in each of the personal computers 1 to 3 constituting the wireless communication network. Will be described.

Each of the personal computers 1 to 3 shown in FIG. 5 has the same function as that shown in FIG.
PC-2 is a data transmission terminal capable of transmitting Data1-0 of MPEG-2, and the personal computer 1 transmits the Data1-0 of MPEG-2 to M
It is assumed that the personal computer 3 is a data relay terminal which can be converted into Data1-1 of PEG-4, and the personal computer 3 is a data terminal terminal capable of receiving and browsing MPEG-4 data.

First, the personal computer 3 is
Inquiries about the data identifiers held in the personal computer 2 and their data attributes are made (STEP 501, 502).

When the personal computer 2 receives this inquiry,
The data identifier and the data attribute (in this case, data: Data1-0, data attribute: MPEG-2) stored in the data attribute management unit provided in the personal computer 2 are transmitted to the personal computer 3 (STEP 503, 504).

The personal computer 3 receives the data identifier and the data attribute from the personal computer 2, and the data attribute management unit in the personal computer 3 confirms whether or not the data can be browsed by itself (STEP).
505).

In this case, the personal computer 3 uses MPEG-4.
Only MPEG data can be browsed, so MPEG-2 data cannot be browsed. Therefore, the personal computer 3 is MPEG
-2, it is searched whether a device capable of converting 2 data to MPEG-4 data exists within the wireless communication range (STEP 506, 507).

In the case of this embodiment, the personal computer 1 is found within the wireless communication range forming the wireless communication network, and the device is MPEG-encoded from the data attribute management unit 15 of the personal computer 1 via the wireless communication unit 11. 2 data to MP
PC3 that conversion to EG-4 data is possible
(STEP 508).

In the personal computer 3, the communication route management unit registers the communication route of Data1-0 in the order of personal computer 2 → personal computer 1 → personal computer 3 via the wireless communication unit in the personal computer 3 (STEP 509), and the communication route is set. PC 1
And notify each of the personal computers 2 (STEP 510, 51
2).

The personal computer 2 receives the communication route information from the personal computer 3, and registers the communication route information in the communication route management section inside the personal computer 2 (STEP 511). Similarly, the personal computer 1 also receives the communication route information from the personal computer 3 and registers the communication route information in the communication route management unit inside the personal computer 1 (STEP 513).

Next, the personal computer 3 outputs Dat to the personal computer 2.
Instruct to start transmission of a1-0 (STEP 514, 51)
5). The personal computer 2 receives the transmission start instruction of Data1-0, and transmits the data of MPEG-2, Data1-0, to the personal computer 1 based on the communication route information registered in the communication route management unit inside the personal computer 2. To (STEP
516, 517).

The personal computer 1 receives the Data1-0 transmitted from the personal computer 2, and the data processing unit 17 in the personal computer 1 uses the data attributes registered in the data attribute management unit 15 to change the Data1- 0 MPEG
-2 data is converted into Data1-1 MPEG-4 data (STEP518). Then, the communication path information registered in the communication path management unit 13 inside the personal computer 1 is referred to, and the personal computer 3 converts D converted into MPEG-4 data.
ata1-1 is transmitted (STEP 519).

When the personal computer 3 receives the MPEG-1 data Data1-1 converted by the personal computer 1, the contents of the MPEG-2 data Data1-0 transmitted from the personal computer 2 can be browsed. Naru (STE
P520).

In the case of the embodiment described above, the data to be transmitted / received can be information such as static files, and can also be dynamic streaming information.

Further, referring to FIG. 6, another processing method such as data transmission, conversion, reproduction, etc. in the personal computers 1 to 3 will be described with respect to the data attribute conversion processing shown in FIG.

Also in FIG. 6, as in the case shown in FIG.
The personal computer 2 is a data transmission terminal capable of transmitting Data-1-0 of MPEG-2.
2 is a data relay terminal capable of converting Data1-0 of No. 2 into Data1-1 of MPEG-4.
Is a data termination terminal capable of receiving and browsing MPEG-4 data.

First, the personal computer 3 collects identifiers and data attributes of data handled by each wireless device within its own wireless communication range (STEPs 601 and 60).
2).

In this case, when the personal computer 1 receives the notification of the data identifier and the data attribute from the personal computer 3, the data attribute management unit 15 and the data processing unit 1 inside the personal computer 1
In step 7, the data identifiers and data attributes that can be converted by the device itself are retrieved from each device within the wireless communication range via the wireless communication unit 11 (STEPs 603 and 604).

When the personal computer 2 receives the data identifier and the request for notification of the data attribute from the personal computer 1, a data identifier (for example, D
data1) and data attributes (eg MPEG-2)
Is notified to the personal computer 1 (STEP 605, 606).

In the personal computer 1, the data identifier Data1-0 and the data attribute MPEG-2 received from the personal computer 2 are received.
And the data having the data identifier Data1-1 and the data attribute MPEG-4 that can be converted in the personal computer 1 are notified to the personal computer 3 (STEP607).

Next, the personal computer 3 instructs the personal computer 1 to start transmission of the data attribute Data1-1 (STEPs 608 and 609).

In the personal computer 1, the data from the personal computer 3 is changed.
When the instruction to start sending 1-1 is received, D
Instruct to transmit data1-0 (STEPs 610 and 61)
1). In response to this instruction, the personal computer 2 uses MPEG-2.
Transmission of data Data1-0 to the personal computer 1 is started (STEPs 612 and 613). When PC1 receives Data1-0 from PC2, PC1 receives
Internal data processing unit 17 converts MPEG-2 data to MP
The data is converted into Data1-1 which is EG-4 data, and the data is transferred to the personal computer 3 via the wireless communication unit 11 inside the personal computer 1.
Then, ta1-1 is transmitted (STEP 614, 615). The personal computer 3 receives Data1-1 which is MPEG-4 data from the personal computer 1 and transmits M from the personal computer 2.
The contents of Data1-0, which is PEG-2 data, can be viewed (STEP 616).

According to this method, even if the personal computer 2 and the personal computer 3 do not have the communication route managing unit as in the conventional case, the personal computer 1 having the communication route managing unit 13 is provided.
By using, it is possible to perform each processing such as data transmission, data attribute conversion, and data reproduction shown in FIG.

As described above, according to the present invention, even when the data compression / expansion method is different between the transmitting side and the receiving side when data is transmitted / received between a plurality of wireless communication devices forming the wireless communication network, When another wireless communication device that constitutes the wireless communication network is capable of data conversion by this different data compression / expansion method, by transferring data once to this wireless communication device, data compression / expansion on the data receiving side Convert to method. Therefore, it is possible to transfer data and reproduce data between wireless communication devices having different data compression methods, so that the wireless communication device on the data receiving side can browse the data.

Next, a specific example of the case of converting the image size will be described as an example of the conversion of the data attribute with reference to FIG.

In the example shown in FIG.
It is assumed that the data of EG-4 image size 320 dots horizontal and 240 dots vertical can be transmitted, and the personal computer 3 receives and reproduces the data of MPEG-4 image size horizontal 176 dots vertical 144 dots. Shall be able to.

Furthermore, in the personal computer 1, MPEG-
The image data of 4 has a function of converting data of 320 dots in width and 240 dots in height to data of MPEG-4 image size of 176 dots in width and 144 dots in length and transmitting.

In this case, the personal computer 2 sends MP to the personal computer 1.
Image size of EG-4 320 × 240 data is transmitted. On PC 1, MP sent from PC 2
EG-4 image size 320 × 240 Data1-0
To receive. On PC 1, the received Data1-0
Data of MPEG-4 image size 176 x 144
The data 1-1 converted to 1-1 and converted to the MPEG-4 image size 176 × 144 is transmitted to the personal computer 3. Then, the personal computer 3 has an MPEG-4 image size 1
By receiving the Data 1-1 converted to 76 × 144, the data having different data attributes transmitted from the personal computer 2 can be reproduced.

That is, in the example of this embodiment, even when the transmitting side and the receiving side can process different image sizes when data is transmitted and received between a plurality of wireless communication devices that form a wireless communication network, If other wireless communication devices that make up the wireless communication network can convert to data of this different image size, by transferring the data once to this wireless communication device, the data of the image size that can be processed on the receiving side can be processed. Convert to. This enables data transfer between wireless communication networks even when the image size data that can be processed on the transmitting side and the receiving side are different, and enables data browsing on the wireless communication device on the data receiving side. Is.

The present invention is not limited to the above embodiment, and can be variously modified and implemented within the scope of the gist.

For example, in this embodiment, the case where the personal computer forming the wireless communication network is equipped with the Bluetooth interface has been described, but the present invention is not limited to this, and instead, for example, IEEE802.
11b, IEEE802.12, IEEE802.15
It can also be applied to the case where another interface specified in etc. is installed.

[0068]

As described above in detail, according to the present invention, when data is transmitted / received between a plurality of wireless communication devices forming a wireless communication network, even if the data attributes are different between the transmitting side and the receiving side. , Enables data transfer between wireless communication networks, and enables data browsing by a wireless communication device on the side of receiving data.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration example of a wireless communication system according to an embodiment of the present invention.

FIG. 2 is a diagram showing an internal configuration of a wireless communication device (personal computer) forming the wireless communication system shown in FIG.

FIG. 3 is a diagram for explaining a data transfer path between wireless communication devices forming the wireless communication network shown in FIG.

FIG. 4 is a diagram showing an example of a case in which a data compression / expansion method is converted and data is transferred between the wireless communication devices configuring the wireless communication network shown in FIG.

5 is a diagram illustrating operation timing when data is transferred between wireless communication devices that form the wireless communication network illustrated in FIG. 1;

FIG. 6 is a diagram for explaining operation timing when another transfer method is used when data is transferred between the wireless communication devices configuring the wireless communication network shown in FIG. 1.

7 is a diagram illustrating an example of a case where data attributes are converted and data is transferred between wireless communication devices included in the wireless communication network illustrated in FIG.

[Explanation of symbols]

1, 2, 3 ... Wireless communication device (personal computer) 11 ... Wireless communication unit 13 ... Communication path management unit 15 ... Data attribute management unit 17 ... Data processing unit

Claims (8)

[Claims] 1. A wireless communication method in which data is transmitted from a wireless transmission device forming a wireless communication network to a wireless reception device, wherein the wireless transmission device transmits data having a first data attribute and the wireless reception is performed. When the device can process only the data of the second data attribute different from the first data attribute, the wireless transmission device converts the data of the first data attribute into the data of the second data attribute. The data having the first data attribute transmitted from the wireless transmission device by the wireless relay device is converted into the data having the second data attribute. A wireless communication method comprising transmitting data to a wireless receiving device. 2. A wireless relay device capable of converting data having the first data attribute into data having the second data attribute is a device in which the wireless receiving device is present within its own wireless communicable area. 2. The wireless communication method according to claim 1, wherein the wireless communication method is searched from among. 3. When the wireless reception device detects the presence of the wireless relay device, the wireless reception device instructs the wireless transmission device and the wireless relay device about a data transfer path, and the wireless transmission device and the wireless transmission device. The wireless communication method according to claim 2, wherein the wireless relay device receives the instruction and determines a data transmission path to perform data transmission. 4. The wireless reception device collects data attributes that can be processed by the device with respect to a device existing in a wireless communicable area in advance, and transmits data from the wireless transmission device based on the result. 2. The wireless communication method according to claim 1, further comprising instructing to perform data transmission via the wireless relay device when receiving the request. 5. The wireless reception device, when collecting the data attributes of devices existing in a wireless communicable area, issues a data transmission instruction to the wireless relay device, and the wireless relay device. 5. The wireless communication method according to claim 4, wherein in response to this instruction, a data transmission instruction is issued to the wireless transmission device. 6. The wireless relay device, when transmitting and receiving data between wireless communication devices constituting a wireless communication network, processes at each wireless communication device as well as a data reception source, a transmission destination and a data relay route. The wireless communication method according to claim 1, wherein the possible data attributes are managed. 7. The wireless communication method according to claim 1, wherein the data attribute is a data compression / expansion method. 8. A wireless communication system in which data is transmitted from a wireless transmission device forming a wireless communication network to a wireless reception device, wherein the wireless transmission device transmits data having a first data attribute and When the receiving device can process only the data having the second data attribute different from the first data attribute, the wireless relay device capable of converting the data having the first data attribute into the data having the second data attribute Exists in the wireless communication network, the wireless transmission device transfers data to the wireless relay device, and the wireless relay device transfers the data of the first data attribute transmitted from the wireless transmission device. A wireless communication system, which converts the data to the second data attribute and then transmits the data to the wireless reception device.