JP2002232433A - Radio communication terminal and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide radio communication terminals which can simultaneously perform communication while three or more terminals share information by using a radio communication protocol requiring the relation of master/slave such as Bluetooth. SOLUTION: The radio communication terminal performs radio communication by using a network formed by permitting a plurality of radio communication terminals being slaves with respect to the radio communication terminal being the master to establish a radio link. A retransmission means 1 retransmitting information from the radio communication terminal being the salve to the radio communication terminal being the other slave when radio communication is performed as the master is arranged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a Bluetooth device.
h, for one wireless communication terminal as a master,
The present invention relates to a wireless communication terminal that forms a network by establishing wireless links by a plurality of wireless communication terminals serving as slaves, and a program.

[0002]

2. Description of the Related Art Bluetooth, which is a wireless device connection standard, has been attracting attention as a substitute for a cable connecting devices. Bluetooth is a standard jointly developed by leading companies in the computer and telecommunications industries. To enable communication between devices anywhere on the earth, we will use the 2.4 GHz frequency band that can be used worldwide.

[0003] The communication speed in the current standard is 1 Mbps,
We plan to upgrade to 2Mbps in the future. The effective channel rate is synchronous voice communication of up to three channels, or simultaneous communication of voice and data in one channel. For asynchronous channels, 721Kbps bidirectional connection and 57.6Kbps return connection, or 432.6Kbps
Supports symmetric links on s. The network is composed of master-slaves, and seven wireless links can be established simultaneously for one master.

[0004]

SUMMARY OF THE INVENTION However, Blu
In a wireless communication terminal that forms a network by establishing a wireless link by a plurality of slave wireless communication terminals with respect to one master wireless communication terminal, as in the case of, for example, the network, the network is in a star shape centered on the master. And the slaves cannot communicate directly.

That is, in a wireless communication terminal forming a network by establishing a wireless link with a plurality of slave wireless communication terminals with respect to one master wireless communication terminal, the slaves can directly communicate with each other. There is a problem that there is no.

In such a wireless communication terminal, it is not possible to inquire of a wireless communication terminal that is already a slave whether or not to give permission to join a wireless communication terminal that wants to newly become a slave. Also, all wireless communication terminals on the network cannot know that any wireless communication terminal has been disconnected.

That is, in such a wireless communication terminal,
There is a problem in that it is not possible to refer to a wireless communication terminal that is already a slave whether or not to grant participation permission to a wireless communication terminal that wants to newly become a slave.

[0008] Further, such a wireless communication terminal has a problem that disconnection of an arbitrary wireless communication terminal cannot be known by all wireless communication terminals on the network.

Further, when such a wireless communication terminal includes a tablet and an LCD, a handwritten image can be input from the tablet, and the LCD can display the input handwritten image on a screen. Cannot operate such that a handwritten image input from each wireless communication terminal connected to the network is written on one shared screen. In addition, a handwritten image input only to a wireless communication terminal desired by a user on a network cannot be displayed.

Further, even if the handwritten image input from each of the wireless communication terminals connected to the network can be operated to write the handwritten image on a single shared screen, the shared The screen cannot be deleted from any wireless communication terminal. Also, it is not possible to color-code the display color of handwritten image drawing for each terminal that has written the handwritten image,
In addition, delete the handwritten image by specifying the writing source,
Nor can it be highlighted.

That is, in such a wireless communication terminal,
If the wireless communication terminal has the function of inputting the handwritten image and displaying it on the screen, the handwritten image input from each wireless communication terminal connected to the above network will be displayed on the same screen as if it were shared. There is a problem that it cannot be operated to write.

In such a wireless communication terminal, when the wireless communication terminal has a function of inputting a handwritten image and displaying the image on a screen, the handwritten image is displayed only on the wireless communication terminal desired by the user on the network. There is a problem that can not be done.

In such a wireless communication terminal, if the wireless communication terminal has a function of inputting a handwritten image and displaying the image on a screen, even if the wireless communication terminal can operate so that the screen can be shared, it is possible to operate the shared screen. There is a problem that it is not possible to delete a single screen from an arbitrary wireless communication terminal.

In such a wireless communication terminal, if the wireless communication terminal has a function of inputting a handwritten image and displaying the image on the screen, even if the wireless communication terminal can operate so that the screen can be shared, the handwritten image can be shared. There is a problem that the display color of the handwritten image drawing cannot be color-coded for each terminal that has written the image.

In such a wireless communication terminal, if the wireless communication terminal has a function of inputting a handwritten image and displaying it on a screen, even if the wireless communication terminal can operate so that the screen can be shared, the handwritten image can be shared. There is a problem that an image cannot be erased or highlighted by designating a writing source.

The present invention is directed to a wireless communication terminal which forms a network by establishing a wireless link with a plurality of slave wireless communication terminals with respect to one master wireless communication terminal in consideration of the above problem. Another object of the present invention is to provide a wireless communication terminal and a program with which slaves can directly communicate with each other.

Further, the present invention has been made in consideration of the above problem, and even in such a wireless communication terminal, it is determined whether or not to give a participation permission to a wireless communication terminal newly desiring to become a slave. It is an object of the present invention to provide a wireless communication terminal capable of making an inquiry to a wireless communication terminal, and a program.

Further, the present invention has been made in consideration of the above problem, and even in such a wireless communication terminal, a wireless communication terminal capable of knowing disconnection of an arbitrary wireless communication terminal by all wireless communication terminals on a network. , And programs.

Further, the present invention has been made in consideration of the above problems, and even in the case of such a wireless communication terminal, if the wireless communication terminal has a function of inputting a handwritten image and displaying the image on a screen, the above network It is an object of the present invention to provide a wireless communication terminal capable of operating as if a handwritten image input from each wireless communication terminal connected to a shared handwritten image is written on one shared screen, and a program. is there.

Further, the present invention has been made in consideration of the above problem, and even in the case of such a wireless communication terminal, if the wireless communication terminal has a function of inputting a handwritten image and displaying the image on a screen, the wireless communication terminal may be connected to the network. It is an object of the present invention to provide a wireless communication terminal device capable of displaying a handwritten image only on a wireless communication terminal desired by the user, and a program.

Further, the present invention has been made in consideration of the above problems, and even in such a wireless communication terminal, if the wireless communication terminal has a function of inputting a handwritten image and displaying the image on a screen, the screen is shared. It is an object of the present invention to provide a wireless communication terminal device and a program that can operate as much as possible and can delete one shared screen from any wireless communication terminal.

Further, the present invention has been made in consideration of the above problem, and even in such a wireless communication terminal, if the wireless communication terminal has a function of inputting a handwritten image and displaying the image on the screen, the screen is temporarily displayed. Can work so that they can be shared,
An object of the present invention is to provide a wireless communication device and a program that can color-code a display color of a handwritten image drawing for each terminal that has written a handwritten image.

In such a wireless communication terminal, if the wireless communication terminal has a function of inputting a handwritten image and displaying the image on a screen, the wireless communication terminal can operate so that the screen can be temporarily shared, and the handwritten image can be transferred. It is an object of the present invention to provide a wireless communication device capable of designating a writing source and performing erasing and highlighting, and a program.

[0024]

In order to solve the above-mentioned problems, a first aspect of the present invention (corresponding to claim 1) is to provide a plurality of slave wireless communication terminals with respect to a master wireless communication terminal. Is a wireless communication terminal that performs wireless communication using a network formed by establishing a wireless link, and when performing wireless communication as a master, information from the wireless communication terminal that is a slave is transmitted to another slave. The wireless communication terminal includes retransmission means for retransmitting the data to the wireless communication terminal.

Further, the second invention (corresponding to claim 2)
Comprises a DLC database for storing link identifiers respectively allocated to the radio links for identifying each radio link on the network, wherein the retransmitting means retransmits information from the radio communication terminal as the slave. In this case, the wireless communication terminal according to the first aspect of the present invention includes DLC setting means for setting another link identifier stored in the DLC database in the information instead of the link identifier set in the information. is there.

The third invention (corresponding to claim 3)
When performing wireless communication as a master or a slave,
A terminal identifier determining unit for determining whether the information is addressed to itself when receiving the information, and an information selecting unit for selecting the information based on the determination result; A terminal is assigned a terminal identifier for identifying each of the wireless terminals, and the information includes at least a terminal identifier of a distribution destination of the information, and the terminal identifier determining unit includes: The wireless communication terminal according to the first aspect of the present invention, wherein the determination is performed based on a terminal identifier of a distribution destination of the information added to the information.

The fourth invention (corresponding to claim 4)
Is the wireless communication terminal according to the third aspect of the present invention, wherein a terminal identifier of a distribution source of the information is added to the information.

The fifth invention (corresponding to claim 5)
When performing wireless communication as a master or a slave,
When the information is received, control flag determination means for determining whether the information payload is control data or data of an upper layer, and control data analysis means for analyzing the payload when the information payload is control data. And control data processing means for performing a predetermined process based on the analysis result, wherein the information includes a control flag indicating whether a payload of the information is control data or data of an upper layer. The flag determination means is the wireless communication terminal according to the first aspect of the present invention, which makes the determination based on the control flag.

The sixth invention (corresponding to claim 6)
Is a wireless communication terminal that performs wireless communication with a master wireless communication terminal by using a network formed by establishing a wireless link by a plurality of slave wireless communication terminals, and includes a master or a slave. When performing wireless communication as described above, when receiving information from another wireless communication terminal of the network, control flag determining means for determining whether the payload of the information is control data or data of an upper layer, and a payload of the information Is control data, the control data analyzing means for analyzing the payload, and control data processing means for performing a predetermined process based on the analysis result, the information, the information payload is control data or higher A control flag indicating whether the data is a layer data. It is a wireless communication terminal which performs the determination based on.

The seventh invention (corresponding to claim 7)
When performing wireless communication as a master, whether or not to grant participation permission to a wireless communication terminal desiring to newly become a slave, using the control data to inquire the wireless communication terminal as a slave, A wireless communication terminal according to the fifth or sixth aspect of the present invention.

An eighth aspect of the present invention (corresponding to claim 8)
Is a wireless communication terminal according to a seventh aspect of the present invention, which uses the control data when responding to an inquiry as to whether or not to grant the participation permission when performing wireless communication as a slave.

The ninth invention (corresponding to claim 9)
Is the wireless communication terminal according to the seventh or eighth aspect of the present invention, wherein the participation permission is to permit performing an operation of finding a wireless communication terminal desiring to newly become a slave.

According to a tenth aspect of the present invention (corresponding to claim 10), the participation permission means that the establishment of a radio link with a radio communication terminal desiring to become a new slave is permitted. A seventh or eighth wireless communication terminal according to the present invention.

Further, an eleventh aspect of the present invention (corresponding to claim 11) further comprises an operation permitting means for permitting the operation when the wireless communication is performed as a slave, wherein the control data processing means comprises: A ninth or tenth wireless communication terminal according to the present invention, further comprising control payload generating means for generating the control data based on the result of the above.

According to a twelfth aspect of the present invention (corresponding to claim 12), when wireless communication is performed as a master, a disconnection detecting means for detecting disconnection of a wireless link is provided, and a wireless link with a slave wireless communication terminal is provided. The fifth or sixth wireless communication terminal according to the present invention for notifying the disconnection of the wireless communication terminal to another wireless communication terminal as a slave.

According to a thirteenth aspect of the present invention (corresponding to claim 13), the control data processing means has control payload generating means for generating the control data, and the generated control data has a payload. The wireless communication terminal according to the twelfth aspect of the present invention, wherein the wireless communication terminal includes a terminal identifier of the wireless communication terminal whose wireless link has been disconnected.

According to a fourteenth aspect of the present invention (corresponding to claim 14), a tablet for generating coordinate data according to a user's handwriting input, and a self-communication and other wireless communication on the network based on the coordinate data An LCD for displaying a handwritten locus of the terminal, wherein the information also includes the coordinate data, and a display screen of the LCD is shared with another wireless communication terminal. Terminal.

According to a fifteenth aspect of the present invention (corresponding to claim 15), a tablet for generating coordinate data according to a user's handwriting input, and a self-communication device and other wireless communication on the network based on the coordinate data An LCD for displaying a handwritten trajectory of the terminal, wherein the information also includes the coordinate data, a display screen of the LCD is shared with another wireless communication terminal, and the control data processing means includes:
The wireless communication terminal according to the fifth aspect of the present invention, further comprising: a clearing unit for deleting a locus displayed on the network, wherein the shared screen can be erased by a predetermined wireless communication terminal on the network.

A sixteenth aspect of the present invention (corresponding to claim 16) is a tablet for generating coordinate data according to a user's handwriting input, and a self-communication device and other wireless communication on the network based on the coordinate data. An LCD for displaying a handwriting trajectory of the terminal; and a display screen of the LCD according to the terminal identifier shared with another wireless communication terminal.
Display color setting means capable of setting a trajectory display color to
The information also includes the coordinate data, and the handwritten locus displayed on the LCD is displayed in a color-coded manner according to the terminal identifier of the distribution source. is there.

A seventeenth invention (corresponding to claim 17) provides a tablet for generating coordinate data according to a user's handwriting input, and a self-communication device and other wireless communication on the network based on the coordinate data. An LCD for displaying a handwriting locus of the terminal; and a coordinate data buffer for buffering coordinate data for each terminal identifier, wherein the information also includes the coordinate data, and the display screen of the LCD is a wireless communication screen. The handwritten locus shared with the communication terminal and displayed on the LCD is the third or fourteenth wireless communication terminal according to the present invention, which can be individually deleted for each terminal identifier of the distribution source.

According to an eighteenth aspect of the present invention (corresponding to claim 18), when wireless communication is performed as a master of the wireless terminal device according to the first aspect of the present invention, information from a wireless communication terminal as a slave is transmitted. This is a program for causing a computer to function as all or a part of retransmission means for retransmission to another wireless communication terminal as a slave.

A nineteenth aspect of the present invention (corresponding to claim 19) is the wireless communication terminal according to the sixth aspect of the present invention, wherein when performing wireless communication as a master or a slave, another wireless communication terminal of the network Control flag determining means for determining whether the information payload is control data or data of an upper layer when receiving information from a control data analyzer, and a control data analyzer for analyzing the payload when the information payload is control data. And a program for causing a computer to function as all or a part of the control data processing means for performing predetermined processing based on the analysis result.

[0043]

BEST MODE FOR CARRYING OUT THE INVENTION A wireless communication terminal according to the present invention has a structure in which a plurality of slave wireless communication terminals form a network by establishing wireless links with respect to one master wireless communication terminal. The retransmitting means of the wireless communication terminal has the effect of transmitting information sent from the slave wireless communication terminal to the master wireless communication terminal to another slave wireless communication terminal.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First Embodiment) FIG. 1 shows a first embodiment of the present invention.
FIG. 4 is a block diagram for explaining an embodiment of the present invention;
This is an example applied to a Bluetooth protocol.

In FIG. 1, 1 is retransmission means, 2 is DLC
Database 3, master-slave storage means 4, tablet 5, tablet driver 6, LCD 6 and L 7
A CD driver, 8 is a protocol stack, and 9 is a communication module.

Also, 10 constituting the retransmission means 1 is a DLC
The setting means 11 is a switch.

FIG. 9 is a block diagram of the communication module 9. In FIG. 9, reference numeral 91 denotes an LM (link manager);
92 is a BB (baseband logic) 93 is an RF (high frequency circuit), and 94 is an antenna.

FIG. 10 is a diagram showing the stack configuration of the protocol stack 8. In FIG. 10, reference numeral 101 denotes an HCI (host controller interface), and 102 denotes an L2CA.
P (logical link), 103 is RFCOMM (virtual COM)
Ports) and 104 are SDP (Service Discovery Protocol).

FIG. 11A is an explanatory diagram of a state in which a plurality of wireless communication terminals form a network. In FIG. 11A, a wireless communication terminal 110a is a master,
b, 110c, and 110d are wireless communication terminals that are slaves. 110a, 110b, 110c in the figure,
And 110d are all the configuration of FIG.

The operation will be described below with reference to FIGS. 1, 9, 10, and 11a. The wireless communication terminal 110a is a master, and the wireless communication terminals 110b, 110c, and 110d
As a slave, a wireless link with a link identifier DLC = 1 between the wireless communication terminal 110a and the wireless communication terminal 110b, a wireless link with a link identifier DLC = 3 between the wireless communication terminal 110a and the wireless communication terminal 110c, a wireless communication terminal 110a Link identifier D between the wireless communication terminal 110d
It is assumed that a wireless link of LC = 5 is established and a star network is formed.

Consider a case where a user having the wireless communication terminal 110b writes a handwritten image on the tablet 4. The handwritten image is converted by the tablet driver 5 into a coordinate data sequence. The coordinate data string is passed to the LCD driver 7 and displayed on the LCD 6. At the same time, the coordinate data sequence is passed to the protocol stack 8.

The coordinate data sequence sent to the RFCOMM 103, which is the uppermost layer of the protocol stack 8, includes a link identifier for the master wireless communication terminal 110a, and a DL.
When C = 1, it is passed to the L2CAP 102 of the lower layer. Thereafter, the packet is packetized by the L2CAP 102 and further transmitted to the lower layer HCI 101. The HCI 101 performs fragmentation for sending data to the communication module 9. The data sent to the communication module 9 is modulated by the BB 92 and then transmitted to the air by the RF 93 and the antenna 94.

On the other hand, the master wireless communication terminal 110a
, The RFCOMM 10
The coordinate data is passed from 3 to the higher order. The coordinate data is LC
The image is displayed as a handwritten image on the LCD 6 via the D driver 7. At the same time, since the master-slave storage unit of the wireless communication terminal 110a stores that it is a master, the switch 11 constituting the retransmission unit 1 is on. Therefore, the received coordinate data is stored in the DLC setting unit 1.
0, link identifiers DLC = 3 and DLC = 5 corresponding to the remaining radio links making up the network
And passed to the protocol stack 8.

As a result, the coordinate data distributed by the wireless communication terminal 110b to the wireless communication terminal 110a through the wireless link with the link identifier DLC = 1 is transmitted by the master wireless communication terminal 110a through the wireless link with the link identifier DLC = 3. The packet is retransmitted to the communication terminal 110b, and is retransmitted to the radio communication terminal 110c through the radio link with the link identifier DLC = 5.

The wireless communication terminal 110c and the wireless communication terminal 110d use the same RFCO as the wireless communication terminal 110a.
The coordinate data is passed from the MM 103 to a higher order. The coordinate data is displayed as a handwritten image on the LCD 6 via the LCD driver 7. Here, the wireless communication terminal 110c
Since the master-slave storage unit of the wireless communication terminal 110d stores the fact that the unit is a slave, the switch 11 constituting the retransmission unit 1 is off. Therefore, the received coordinate data is not retransmitted.

As described above, according to the first embodiment of the present invention, the radio communication terminal 110a, the radio communication terminal 110
b, wireless communication terminal 110c and wireless communication terminal 110d
Works like writing a handwritten image on one shared screen, and is extremely useful.

(Second Embodiment) FIG. 2 shows a second embodiment of the present invention.
FIG. 4 is a block diagram for explaining an embodiment of the present invention;
This is an example applied to a Bluetooth protocol.

In FIG. 2, 1 is retransmission means, 2 is DLC
Database 3, master-slave storage means 4, tablet 5, tablet driver 6, LCD 6 and L 7
A CD driver, 8 is a protocol stack, 9 is a communication module, 20 is a terminal identifier database, 21 is a terminal identifier determining unit, 22 is a switch, and 23 is a terminal identifier adding unit.

Also, 10 constituting the retransmission means 1 is a DLC
The setting means 11 is a switch.

FIG. 9 is a block diagram of the communication module 9. In FIG. 9, reference numeral 91 denotes an LM (link manager);
92 is a BB (baseband logic) 93 is an RF (high frequency circuit), and 94 is an antenna.

FIG. 10 is a stack configuration diagram of the protocol stack 8. In FIG. 10, reference numeral 101 denotes an HCI (host controller interface), and reference numeral 102 denotes an L2CA.
P (logical link), 103 is RFCOMM (virtual COM)
Ports) and 104 are SDP (Service Discovery Protocol).

FIG. 11A is an explanatory diagram showing a state in which a plurality of wireless communication terminals form a network. In FIG. 11A, a wireless communication terminal 110a is a master,
b, 110c, and 110d are wireless communication terminals that are slaves. 110a, 110b, 110c in the figure,
And 110d all have the configuration of FIG.

FIG. 8A is an explanatory diagram of a frame structure when a terminal identifier is used. In FIG. 8A, reference numeral 80 denotes a calling terminal identifier, 81 denotes a called terminal identifier, 83 denotes X-axis coordinate data, and 84 denotes Y-axis coordinate data.

The operation will be described below with reference to FIGS. 2, 8A, 9, 10, and 11A. Wireless communication terminal 110a
Are the masters, wireless communication terminals 110b, 110c, and 1
10d as a slave, a wireless link having a link identifier DLC = 1 between the wireless communication terminal 110a and the wireless communication terminal 110b, and the wireless communication terminal 110a and the wireless communication terminal 110c.
It is assumed that a wireless link having a link identifier DLC = 3 is provided between the wireless communication terminals 110a and 110d, and a wireless link having a link identifier DLC = 5 is provided between the wireless communication terminals 110a and 110d, thereby forming a star network. ing.

Consider a case where a user having the wireless communication terminal 110b writes a handwritten image on the tablet 4. The handwritten image is converted by the tablet driver 5 into a coordinate data sequence. The coordinate data string is passed to the LCD driver 7 and displayed on the LCD 6. At the same time, the terminal identifier adding means 23 adds the originating terminal identifier, which is the terminal identifier of the distribution source, and the destination terminal identifier, which indicates the terminal identifier of the distribution destination, to the coordinate data sequence, and passes it to the protocol stack 8. The structure of the frame passed to the protocol stack 8 is shown in FIG.

Here, the originating terminal identifier is the terminal identifier of the terminal itself, and the destination terminal identifier is the terminal identifier of the partner terminal to be distributed. The terminal identifier of each wireless communication terminal on the network is stored in the terminal identifier database 20. Each time the network configuration changes, the terminal identifier database 20 is updated. More specifically, in a terminal terminal identifier determining means 21 described later, the terminal identifier database 2
When a new terminal identifier that is not registered as 0 is detected, the terminal identifier is additionally registered in the terminal identifier database 20. When all wireless links are disconnected, the wireless communication terminal determines that it has left the network, and deletes terminal identifiers other than the terminal identifier of the terminal itself from the terminal identifier database 20.

The coordinate data sequence sent to the RFCOMM 103, which is the uppermost layer of the protocol stack 8, includes a link identifier for the master wireless communication terminal 110a, and a DL.
When C = 1, it is passed to the L2CAP 102 of the lower layer. Thereafter, the packet is packetized by the L2CAP 102 and further transmitted to the lower layer HCI 101. The HCI 101 performs fragmentation for sending data to the communication module 9. The data sent to the communication module 9 is modulated by the BB 92 and then transmitted to the air by the RF 93 and the antenna 94.

On the other hand, the master wireless communication terminal 110a
, The RFCOMM 10
The coordinate data is passed from 3 to the higher order. Whether the coordinate data is coordinate data addressed to the own terminal is determined by the terminal identifier determining means 21 based on the destination terminal identifier, and if it is addressed to the own terminal, the SW 22 is turned on. Then, the coordinate data is displayed as a handwritten image on the LCD 6 via the LCD driver 7. At the same time, since the master-slave storage unit of the wireless communication terminal 110a stores that it is a master, the switch 11 constituting the retransmission unit 1 is on.
Therefore, the received coordinate data is set by the DLC setting means 10 to link identifiers DLC = 3 and DLC = 5 corresponding to the remaining wireless links constituting the network, and is passed to the protocol stack 8.

As a result, the coordinate data distributed by the wireless communication terminal 110b to the wireless communication terminal 110a through the wireless link with the link identifier DLC = 1 is transmitted by the master wireless communication terminal 110a through the wireless link with the link identifier DLC = 3. The packet is retransmitted to the communication terminal 110b, and is retransmitted to the radio communication terminal 110c through the radio link with the link identifier DLC = 5.

The wireless communication terminal 110c and the wireless communication terminal 110d use the same RFCO as the wireless communication terminal 110a.
The coordinate data is passed from the MM 103 to a higher order. Whether the coordinate data is coordinate data addressed to the own terminal is determined by the terminal identifier determining means 21 based on the destination terminal identifier, and if it is addressed to the own terminal, the SW 22 is turned on. Then, the coordinate data is displayed as a handwritten image on the LCD 6 via the LCD driver 7. Here, since the master-slave storage units of the wireless communication terminals 110c and 110d store that they are slaves, the switch 11 constituting the retransmission unit 1 is off. Therefore, the received coordinate data is not retransmitted.

Here, if a value meaning all terminals is defined in advance as a terminal identifier, coordinate data can be sent to all wireless communication terminals on the network without specifying a delivery destination.

As described above, according to the second embodiment of the present invention, radio communication terminal 110a, radio communication terminal 110
b, wireless communication terminal 110c and wireless communication terminal 110d
Can not only write handwritten images on a single shared screen, but also use terminal identifiers to display handwritten images only on wireless communication terminals desired by users on the network. It is extremely useful.

(Third Embodiment) FIG. 3 shows a third embodiment of the present invention.
FIG. 3 is a block diagram for explaining an embodiment of the present invention.
This is an example in which the present invention is applied to the ettooth protocol.

In FIG. 3, 1 is retransmission means, 2 is DLC
Database 3, master-slave storage means 4, tablet 5, tablet driver 6, LCD 6 and L 7
CD driver, 8 a protocol stack, 9 a communication module, 20 a terminal identifier database, 21 a terminal identifier determining means, 22 a switch, 23 a terminal identifier adding means, 30 a control flag determining means, 31 a switch,
2 is control data analysis means, 33 is control data processing means,
37 is a control data adding means.

Also, 10 constituting the retransmission means 1 is a DLC
The setting means 11 is a switch.

The control data processing means 33 comprises a control payload generating means 34, an INQ operation permitting means 35, and a PAGE operation permitting means 36.

FIG. 9 is a block diagram of the communication module 9. In FIG. 9, reference numeral 91 denotes an LM (link manager);
92 is a BB (baseband logic) 93 is an RF (high frequency circuit), and 94 is an antenna.

FIG. 10 is a diagram showing the stack configuration of the protocol stack 8. In FIG. 10, reference numeral 101 denotes an HCI (host controller interface), and reference numeral 102 denotes an L2CA.
P (logical link), 103 is RFCOMM (virtual COM)
Ports) and 104 are SDP (Service Discovery Protocol).

FIG. 11B is an explanatory diagram showing a state in which a plurality of wireless communication terminals form a network. In FIG. 11B, a wireless communication terminal 110a is a master,
b, 110c, and 110d are wireless communication terminals that are slaves. 110e is a wireless communication terminal that has not yet joined the network. 110a, 110 in the figure
b, 110c, 110d, and 110e are all shown in FIG.
It is a structure of.

FIG. 8B is an explanatory diagram of a frame structure when a terminal identifier and a control flag are used. In FIG. 8B, 80 is the calling terminal identifier, 81 is the called terminal identifier, 82
Is a control flag, 83 is X-axis coordinate data, 84 is Y-axis coordinate data, 85 is an operation code, 86 is length, 87
Is a parameter and 89 is a payload.

The operation will be described below with reference to FIGS. 3, 8b, 9, 10, and 11b. Wireless communication terminal 110a
Are the masters, wireless communication terminals 110b, 110c, and 1
10d as a slave, a wireless link having a link identifier DLC = 1 between the wireless communication terminal 110a and the wireless communication terminal 110b, and the wireless communication terminal 110a and the wireless communication terminal 110c.
It is assumed that a wireless link having a link identifier DLC = 3 is provided between the wireless communication terminals 110a and 110d, and a wireless link having a link identifier DLC = 5 is provided between the wireless communication terminals 110a and 110d, thereby forming a star network. ing.

Consider a case where a user having the wireless communication terminal 110b writes a handwritten image on the tablet 4. The handwritten image is converted by the tablet driver 5 into a coordinate data sequence. The coordinate data string is passed to the LCD driver 7 and displayed on the LCD 6.

At the same time, the control flag adding means 37 adds a control flag having a value indicating that the coordinate data string is coordinate data. Next, in the terminal identifier adding means 23, the originating terminal identifier which is the terminal identifier of the distribution source and the destination terminal identifier which indicates the terminal identifier of the distribution destination are added, and are passed to the protocol stack 8. The structure of the frame passed to the protocol stack 8 is shown in FIG. The control flag 82 is set to a value indicating that the payload 89 is coordinate data: 0, and the payload 89 is set to the X-axis coordinate data 8.
3. It is composed of Y-axis coordinate data 84.

Here, the originating terminal identifier is the terminal identifier of the terminal itself, and the destination terminal identifier is the terminal identifier of the partner terminal to be distributed. The terminal identifier of each wireless communication terminal on the network is stored in the terminal identifier database 20. Each time the network configuration changes, the terminal identifier database 20 is updated. More specifically, in a terminal terminal identifier determining means 21 described later, the terminal identifier database 2
When a new terminal identifier that is not registered as 0 is detected, the terminal identifier is additionally registered in the terminal identifier database 20. When all wireless links are disconnected, the wireless communication terminal determines that it has left the network, and deletes terminal identifiers other than the terminal identifier of the terminal itself from the terminal identifier database 20.

The coordinate data sequence sent to the RFCOMM 103, which is the uppermost layer of the protocol stack 8, includes a link identifier for the master wireless communication terminal 110a,
When C = 1, it is passed to the L2CAP 102 of the lower layer. Thereafter, the packet is packetized by the L2CAP 102 and further transmitted to the lower layer HCI 101. The HCI 101 performs fragmentation for sending data to the communication module 9. The data sent to the communication module 9 is modulated by the BB 92 and then transmitted to the air by the RF 93 and the antenna 94.

On the other hand, the master wireless communication terminal 110a
, The RFCOMM 10
The coordinate data is passed from 3 to the higher order. Whether the coordinate data is coordinate data addressed to the own terminal is determined by the terminal identifier determining means 21 based on the destination terminal identifier, and if it is addressed to the own terminal, the SW 22 is turned on. The control flag determination means 30 determines whether the coordinate data passed through the SW 22 is coordinate data or control data.
Tilt 31 to the right.

As a result, the coordinate data is displayed as a handwritten image on the LCD 6 via the LCD driver 7. At the same time, since the master-slave storage unit of the wireless communication terminal 110a stores that it is a master, the switch 11 constituting the retransmission unit 1 is on. Therefore,
The received coordinate data is stored in the DLC setting unit 10.
Link identifiers DLC = 3 and DLC = 5 corresponding to the remaining radio links constituting the network are set;
It is passed to the protocol stack 8.

As a result, the coordinate data distributed by the wireless communication terminal 110b to the wireless communication terminal 110a through the wireless link with the link identifier DLC = 1 is transmitted by the master wireless communication terminal 110a through the wireless link with the link identifier DLC = 3. The packet is retransmitted to the communication terminal 110b, and is retransmitted to the radio communication terminal 110c through the radio link with the link identifier DLC = 5.

The wireless communication terminal 110c and the wireless communication terminal 110d use the same RFCO as the wireless communication terminal 110a.
The coordinate data is passed from the MM 103 to a higher order. Whether the coordinate data is coordinate data addressed to the own terminal is determined by the terminal identifier determining means 21 based on the destination terminal identifier, and if it is addressed to the own terminal, the SW 22 is turned on. Whether the coordinate data passed through the SW 22 is coordinate data or control data is determined by the control flag determining means 30. If the coordinate data is coordinate data, the SW 31 is tilted to the right.

Thus, the coordinate data is displayed as a handwritten image on the LCD 6 via the LCD driver 7. Here, since the master-slave storage units of the wireless communication terminals 110c and 110d store that they are slaves, the switch 11 configuring the retransmission unit 1 is off. Therefore, the received coordinate data is not retransmitted.

Here, if a value indicating all terminals is defined in advance as a terminal identifier, coordinate data can be sent to all wireless communication terminals on the network without specifying a delivery destination.

Next, a procedure in which a new wireless communication terminal 110e who wants to join the network joins the network will be described.

The wireless communication terminal 110a as the master can check (INQ) whether there is a wireless communication terminal capable of establishing a wireless link in the vicinity. B
In the case of Bluetooth, INQ can be performed by issuing a predetermined HCI command to the communication module 9.

When performing the INQ, the radio communication terminal 110a
First, the slave wireless communication terminals 110b, 110c, and 110d already participating in the network are asked.

[0096]

[Table 1] More specifically, the control payload generating means 34 creates the control data of the INQ permission request of the operation code 01h shown in Table 1. The control data is added with a control flag having a value indicating that the control data is control data by the control flag adding means 37.

Next, in the terminal identifier adding means 23, the originating terminal identifier which is the terminal identifier of the distribution source and the destination terminal identifier which indicates the terminal identifier of the distribution destination are added, and are passed to the protocol stack 8. The structure of the frame passed to the protocol stack 8 is shown in FIG. The control flag 82 is set to a value indicating that the payload 89 is control data: 1, and the payload 89 includes an operation code 85 and a length.
th 86 and a parameter 87.

The subsequent flow of control data is the same as the coordinate data. Slave wireless communication terminals 110b, 110
Control data is passed from the RFCOMM 103 to the higher order in c and 110d. Whether the control data is control data addressed to the terminal itself is determined by the terminal identifier determining means 21 based on the destination terminal identifier. If the control data is addressed to the terminal itself, the SW 22 is turned on. The control data passed through the SW 22 is determined by the control flag determination means 30 as coordinate data or control data. If the control data is control data, the SW 31 is tilted to the left.

As a result, the control data is passed to the control data analysis means 32. The control data analysis means 32 confirms the operation code 01h of the control data to confirm that it is the control data of the INQ permission request. In response to this, the control payload generating means 34 respectively operates the operation codes 81 shown in Table 1.
Generate an INQ authorization response for h. Each of the slave wireless communication terminals 110b, 110c, and 110d determines whether or not to permit INQ, and sets it in a parameter.

The generated control data is sent to the master wireless communication terminal 110a via the control flag adding means 37 and the terminal identifier adding means 23 in the same procedure as described above.

The wireless communication terminal 110a as a master is connected to slave wireless communication terminals 110b and 110 on the network.
c, and 110d respond to the INQ authorization request from
NQ grant response is received and I
A predetermined HC for the NQ permission means 35 to start the INQ
An I command is issued to the communication module 9.

In response to this, the communication module 9 starts the INQ operation. In the case of Bluetooth, the communication module allocates a predetermined time slot to INQ operation and
Therefore, although the communication speed of the wireless link is reduced, INQ can be performed while maintaining the wireless link.

The wireless communication terminal 110a, which is the master, knows the existence of a new wireless communication terminal 110e by INQ.
Next, the wireless communication terminal 110a, which is the master, establishes (PAGE) a wireless link with the new wireless communication terminal 110e. When performing PAGE, the wireless communication terminals 110b and 110, which are slaves on the network, follow the same procedure as INQ.
c, and 110d, using control data
Request permission of E (operation code 02h page permission request in Table 1). Here, the difference from the case of INQ is that the terminal identifier of the wireless communication terminal to be subjected to PAGE is added as a parameter. Thereby, each wireless communication terminal 11
Ob, 110c, and 110d can determine whether to allow the terminal to join the network.

As described above, according to the third embodiment of the present invention, radio communication terminal 110a, radio communication terminal 110
b, wireless communication terminal 110c and wireless communication terminal 110d
Can not only write handwritten images on a single shared screen, but also use terminal identifiers to display handwritten images only on wireless communication terminals desired by users on the network. Become. Further, by using the control data, the wireless communication terminal 110e wishing to newly become a slave
It is possible to refer to another wireless communication terminal that is already a slave as to whether or not to give a participation permission to the wireless communication terminal, which is extremely useful.

(Fourth Embodiment) FIG. 4 shows a fourth embodiment of the present invention.
FIG. 3 is a block diagram for explaining an embodiment of the present invention.
This is an example in which the present invention is applied to the ettooth protocol.

In FIG. 4, 1 is retransmission means, 2 is DLC
Database 3, master-slave storage means 4, tablet 5, tablet driver 6, LCD 6 and L 7
CD driver, 8 a protocol stack, 9 a communication module, 20 a terminal identifier database, 21 a terminal identifier determining means, 22 a switch, 23 a terminal identifier adding means, 30 a control flag determining means, 31 a switch,
2 is control data analysis means, 40 is disconnection detection means, and 37 is control data addition means.

Also, 10 constituting the retransmission means 1 is a DLC
The setting means 11 is a switch.

FIG. 9 is a block diagram of the communication module 9. In FIG. 9, reference numeral 91 denotes an LM (link manager);
92 is a BB (baseband logic) 93 is an RF (high frequency circuit), and 94 is an antenna.

FIG. 10 is a diagram showing a stack configuration of the protocol stack 8. In FIG. 10, reference numeral 101 denotes an HCI (host controller interface), and reference numeral 102 denotes an L2CA.
P (logical link), 103 is RFCOMM (virtual COM)
Ports) and 104 are SDP (Service Discovery Protocol).

FIG. 11A is a diagram illustrating a state in which a plurality of wireless communication terminals form a network. In FIG. 11A, a wireless communication terminal 110a is a master,
b, 110c, and 110d are wireless communication terminals that are slaves. 110a, 110b, 110c in the figure,
And 110d all have the configuration of FIG.

FIG. 8B is an explanatory diagram of a frame structure when a terminal identifier and a control flag are used. In FIG. 8B, 80 is the calling terminal identifier, 81 is the called terminal identifier, 82
Is a control flag, 83 is X-axis coordinate data, 84 is Y-axis coordinate data, 85 is an operation code, 86 is length, 87
Is a parameter and 89 is a payload. Figure 4 below,
The operation will be described with reference to FIGS. 8B, 9, 10, and 11A. Wireless communication terminal 110a is a master, wireless communication terminal 1
10b, 110c and 110d are slaves
A wireless link having a link identifier DLC = 1 between the wireless communication terminal 110a and the wireless communication terminal 110b,
0a and the link identifier DLC between the wireless communication terminal 110c.
It is assumed that a wireless link of = 3, a wireless link of link identifier DLC = 5 is established between the wireless communication terminal 110a and the wireless communication terminal 110d, and a star network is formed.

[0112] Consider a case where a user having the wireless communication terminal 110b writes a handwritten image on the tablet 4. The handwritten image is converted by the tablet driver 5 into a coordinate data sequence. The coordinate data string is passed to the LCD driver 7 and displayed on the LCD 6.

At the same time, the control flag adding means 37 adds a control flag having a value indicating that the coordinate data string is coordinate data. Next, in the terminal identifier adding means 23, the originating terminal identifier which is the terminal identifier of the distribution source and the destination terminal identifier which indicates the terminal identifier of the distribution destination are added, and are passed to the protocol stack 8. The structure of the frame passed to the protocol stack 8 is shown in FIG. The control flag 82 is set to a value indicating that the payload 89 is coordinate data: 0, and the payload 89 is set to the X-axis coordinate data 8.
3. It is composed of Y-axis coordinate data 84.

Here, the originating terminal identifier is the terminal identifier of the terminal itself, and the destination terminal identifier is the terminal identifier of the partner terminal to be distributed. The terminal identifier of each wireless communication terminal on the network is stored in the terminal identifier database 20. Each time the network configuration changes, the terminal identifier database 20 is updated. More specifically, in a terminal terminal identifier determining means 21 described later, the terminal identifier database 2
When a new terminal identifier that is not registered as 0 is detected, the terminal identifier is additionally registered in the terminal identifier database 20. When all wireless links are disconnected, the wireless communication terminal determines that it has left the network, and deletes terminal identifiers other than the terminal identifier of the terminal itself from the terminal identifier database 20.

The coordinate data sequence sent to the RFCOMM 103, which is the uppermost layer of the protocol stack 8, includes a link identifier with the master wireless communication terminal 110a, DL
When C = 1, it is passed to the L2CAP 102 of the lower layer. Thereafter, the packet is packetized by the L2CAP 102 and further transmitted to the lower layer HCI 101. The HCI 101 performs fragmentation for sending data to the communication module 9. The data sent to the communication module 9 is modulated by the BB 92 and then transmitted to the air by the RF 93 and the antenna 94.

On the other hand, the master radio communication terminal 110a
, The RFCOMM 10
The coordinate data is passed from 3 to the higher order. Whether the coordinate data is coordinate data addressed to the own terminal is determined by the terminal identifier determining means 21 based on the destination terminal identifier, and if it is addressed to the own terminal, the SW 22 is turned on. The control flag determination means 30 determines whether the coordinate data passed through the SW 22 is coordinate data or control data.
Tilt 31 to the right.

Thus, the coordinate data is displayed as a handwritten image on the LCD 6 via the LCD driver 7. At the same time, since the master-slave storage unit of the wireless communication terminal 110a stores that it is a master, the switch 11 constituting the retransmission unit 1 is on. Therefore,
The received coordinate data is stored in the DLC setting unit 10.
Link identifiers DLC = 3 and DLC = 5 corresponding to the remaining radio links constituting the network are set;
It is passed to the protocol stack 8.

As a result, the coordinate data distributed by the wireless communication terminal 110b to the wireless communication terminal 110a through the wireless link with the link identifier DLC = 1 is transmitted by the master wireless communication terminal 110a through the wireless link with the link identifier DLC = 3. The packet is retransmitted to the communication terminal 110b, and is retransmitted to the radio communication terminal 110c through the radio link with the link identifier DLC = 5.

[0119] The wireless communication terminal 110c and the wireless communication terminal 110d have the same RFCO as the wireless communication terminal 110a.
The coordinate data is passed from the MM 103 to a higher order. Whether the coordinate data is coordinate data addressed to the own terminal is determined by the terminal identifier determining means 21 based on the destination terminal identifier, and if it is addressed to the own terminal, the SW 22 is turned on. Whether the coordinate data passed through the SW 22 is coordinate data or control data is determined by the control flag determining means 30. If the coordinate data is coordinate data, the SW 31 is tilted to the right.

Thus, the coordinate data is displayed as a handwritten image on the LCD 6 via the LCD driver 7. Here, since the master-slave storage units of the wireless communication terminals 110c and 110d store that they are slaves, the switch 11 constituting the retransmission unit 1 is off. Therefore, the received coordinate data is not retransmitted.

Here, if a value indicating all terminals is defined in advance as a terminal identifier, coordinate data can be sent to all wireless communication terminals on the network without specifying a delivery destination.

As described above, the radio communication terminals 110a, 110
Consider a case where the wireless communication terminal 110c is disconnected spontaneously or by an external factor in the network configured by b, 110c, and 110d.

When the wireless communication terminal 110c is disconnected,
First, a predetermined HCI event indicating disconnection occurs from the communication module 9 in the wireless communication terminal 110a as the master. The disconnection detection unit 40 notifies the control payload generation unit 34 of the disconnection of the wireless communication terminal 110c. The control payload generating means generates the control data of the disconnection notification of the operation code 03h shown in Table 1. The control data is added with a control flag having a value indicating that the control data is control data by the control flag adding means 37. Next, the terminal identifier adding means 23 adds the originating terminal identifier, which is the terminal identifier of the distribution source, and the destination terminal identifier, which indicates the terminal identifier of the distribution destination, and passes them to the protocol stack 8. FIG. 8B shows the structure of the frame passed to the protocol stack 8. Control flag 8
2 is a value indicating that the payload 89 is control data:
Set to 1 and payload 89 is opcode 8
5, length 86, and parameter 87.

The subsequent flow of control data is the same as that of coordinate data. Slave wireless communication terminal 110b and 1
In 10d, control data is passed from the RFCOMM 103 to the upper level. Whether the control data is control data addressed to the terminal itself is determined by the terminal identifier determining means 21 based on the destination terminal identifier. If the control data is addressed to the terminal itself, the SW 22 is turned on. S
The control data passed through W22 is transmitted to the control flag determination unit 30.
It is determined whether the data is coordinate data or control data. If the data is control data, the SW 31 is tilted to the left.

Thus, the control data is passed to the control data analysis means 32. The control data analysis means 32 confirms the operation code 03h of the control data and confirms that it is the control data of the disconnection notification.

Each of slave wireless communication terminals 110b and 110d performs an appropriate process corresponding to disconnection of wireless communication terminal 110c. For example, by displaying the fact on the LCD 6, the user is notified that the wireless communication terminal 110c has left the network.

As described above, according to the fourth embodiment of the present invention, radio communication terminal 110a, radio communication terminal 110
b, wireless communication terminal 110c and wireless communication terminal 110d
Not only works as if writing a handwritten image on a shared screen, but also allows the handwritten image to be displayed only on the wireless communication terminal desired by the user on the network by using the terminal identifier. Become. Further, it is extremely useful because all wireless communication terminals on the network can know that any wireless communication terminal has been disconnected.

(Fifth Embodiment) FIG. 5 shows a fifth embodiment of the present invention.
FIG. 3 is a block diagram for explaining an embodiment of the present invention.
This is an example in which the present invention is applied to the ettooth protocol.

In FIG. 5, 1 is retransmission means, 2 is DLC
Database 3, master-slave storage means 4, tablet 5, tablet driver 6, LCD 6 and L 7
CD driver, 8 a protocol stack, 9 a communication module, 20 a terminal identifier database, 21 a terminal identifier determining means, 22 a switch, 23 a terminal identifier adding means, 30 a control flag determining means, 31 a switch,
2 is control data analysis means, 33 is control data processing means,
34 is a control payload generating means, and 37 is a control data adding means.

Also, 10 constituting the retransmitting means 1 is a DLC
The setting means 11 is a switch.

The reference numeral 50 constituting the control data processing means 33 is a clear means.

FIG. 9 is a block diagram of the communication module 9. In FIG. 9, reference numeral 91 denotes an LM (link manager);
92 is a BB (baseband logic) 93 is an RF (high frequency circuit), and 94 is an antenna.

FIG. 10 is a diagram showing the stack configuration of the protocol stack 8. In FIG. 10, reference numeral 101 denotes an HCI (host controller interface), and 102 denotes an L2CA.
P (logical link), 103 is RFCOMM (virtual COM)
Ports) and 104 are SDP (Service Discovery Protocol).

FIG. 11A is an explanatory diagram of a state in which a plurality of wireless communication terminals form a network. In FIG. 11A, a wireless communication terminal 110a is a master,
b, 110c, and 110d are wireless communication terminals that are slaves. 110a, 110b, 110c in the figure,
And 110d all have the configuration of FIG.

FIG. 8B is an explanatory diagram of a frame structure when a terminal identifier and a control flag are used. In FIG. 8B, 80 is the calling terminal identifier, 81 is the called terminal identifier, 82
Is a control flag, 83 is X-axis coordinate data, 84 is Y-axis coordinate data, 85 is an operation code, 86 is length, 87
Is a parameter and 89 is a payload.

The operation will be described below with reference to FIGS. 5, 8b, 9, 10, and 11a. Wireless communication terminal 110a
Are the masters, wireless communication terminals 110b, 110c, and 1
10d as a slave, a wireless link having a link identifier DLC = 1 between the wireless communication terminal 110a and the wireless communication terminal 110b, and the wireless communication terminal 110a and the wireless communication terminal 110c.
It is assumed that a wireless link having a link identifier DLC = 3 is provided between the wireless communication terminals 110a and 110d, and a wireless link having a link identifier DLC = 5 is provided between the wireless communication terminals 110a and 110d, thereby forming a star network. ing.

[0137] Consider a case where a user having the wireless communication terminal 110b writes a handwritten image on the tablet 4. The handwritten image is converted by the tablet driver 5 into a coordinate data sequence. The coordinate data string is passed to the LCD driver 7 and displayed on the LCD 6.

At the same time, the control flag adding means 37 adds a control flag having a value indicating that the coordinate data string is coordinate data. Next, the terminal identifier adding means 23 adds the originating terminal identifier, which is the terminal identifier of the distribution source, and the destination terminal identifier, which indicates the terminal identifier of the distribution destination, and passes them to the protocol stack 8. It is passed to the protocol stack 8. The structure of the frame passed to the protocol stack 8 is shown in FIG. The control flag 82 is set to a value indicating that the payload 89 is coordinate data: 0,
The payload 89 includes X-axis coordinate data 83 and Y-axis coordinate data 84.

Here, the originating terminal identifier is the terminal identifier of the terminal itself, and the destination terminal identifier is the terminal identifier of the partner terminal to be distributed. The terminal identifier of each wireless communication terminal on the network is stored in the terminal identifier database 20. Each time the network configuration changes, the terminal identifier database 20 is updated. More specifically, in a terminal terminal identifier determining means 21 described later, the terminal identifier database 2
When a new terminal identifier that is not registered as 0 is detected, the terminal identifier is additionally registered in the terminal identifier database 20. When all wireless links are disconnected, the wireless communication terminal determines that it has left the network, and deletes terminal identifiers other than the terminal identifier of the terminal itself from the terminal identifier database 20.

The coordinate data sequence sent to the RFCOMM 103, which is the uppermost layer of the protocol stack 8, includes a link identifier for the wireless communication terminal 110a, which is the master, and a DL.
When C = 1, it is passed to the L2CAP 102 of the lower layer. Thereafter, the packet is packetized by the L2CAP 102 and further transmitted to the lower layer HCI 101. The HCI 101 performs fragmentation for sending data to the communication module 9. The data sent to the communication module 9 is modulated by the BB 92 and then transmitted to the air by the RF 93 and the antenna 94.

On the other hand, the master wireless communication terminal 110a
, The RFCOMM 10
The coordinate data is passed from 3 to the higher order. Whether the coordinate data is coordinate data addressed to the own terminal is determined by the terminal identifier determining means 21 based on the destination terminal identifier, and if it is addressed to the own terminal, the SW 22 is turned on. The control flag determination means 30 determines whether the coordinate data passed through the SW 22 is coordinate data or control data.
Tilt 31 to the right.

Thus, the coordinate data is displayed as a handwritten image on the LCD 6 via the LCD driver 7. At the same time, since the master-slave storage unit of the wireless communication terminal 110a stores that it is a master, the switch 11 constituting the retransmission unit 1 is on. Therefore,
The received coordinate data is stored in the DLC setting unit 10.
Link identifiers DLC = 3 and DLC = 5 corresponding to the remaining radio links constituting the network are set;
It is passed to the protocol stack 8.

As a result, the coordinate data distributed by the wireless communication terminal 110b to the wireless communication terminal 110a through the wireless link with the link identifier DLC = 1 is transmitted by the master wireless communication terminal 110a through the wireless link with the link identifier DLC = 3. The packet is retransmitted to the communication terminal 110b, and is retransmitted to the radio communication terminal 110c through the radio link with the link identifier DLC = 5.

The radio communication terminal 110c and the radio communication terminal 110d use the same RFCO as the radio communication terminal 110a.
The coordinate data is passed from the MM 103 to a higher order. Whether the coordinate data is coordinate data addressed to the own terminal is determined by the terminal identifier determining means 21 based on the destination terminal identifier, and if it is addressed to the own terminal, the SW 22 is turned on. Whether the coordinate data passed through the SW 22 is coordinate data or control data is determined by the control flag determining means 30. If the coordinate data is coordinate data, the SW 31 is tilted to the right.

As a result, the coordinate data is displayed as a handwritten image on the LCD 6 via the LCD driver 7. Here, since the master-slave storage units of the wireless communication terminals 110c and 110d store that they are slaves, the switch 11 constituting the retransmission unit 1 is off. Therefore, the received coordinate data is not retransmitted.

Here, if a value indicating all terminals is defined in advance as a terminal identifier, coordinate data can be sent to all wireless communication terminals on the network without specifying a delivery destination.

As described above, the radio communication terminals 110a, 110
Consider a case where a screen shared by the wireless communication terminal 110c is completely erased in a network configured by b, 110c, and 110d.

The control payload generating means 34 of the wireless communication terminal 110c generates control data of a screen erase request of the operation code 04h shown in Table 1. The control data is added with a control flag having a value indicating that the control data is control data by the control flag adding means 37. Next, the terminal identifier adding means 23 adds the originating terminal identifier, which is the terminal identifier of the distribution source, and the destination terminal identifier, which indicates the terminal identifier of the distribution destination, and passes them to the protocol stack 8. The structure of the frame passed to the protocol stack 8 is shown in FIG. Control flag 8
2 is a value indicating that the payload 89 is control data:
Set to 1 and payload 89 is opcode 8
5, length 86, and parameter 87.

The subsequent flow of control data is the same as that of coordinate data. Wireless communication terminals 110a, 110b, and 1
In 10d, the control data is passed from the RFCOMM 103 to the upper level. Whether the control data is control data addressed to the terminal itself is determined by the terminal identifier determining means 21 based on the destination terminal identifier. If the control data is addressed to the terminal itself, the SW 22 is turned on. The control data passed through the SW 22 is determined by the control flag determination means 30 as coordinate data or control data. If the control data is control data, the SW 31 is tilted to the left.

As a result, the control data is passed to the control data analysis means 32. The control data analysis means 32 confirms the operation code 04h of the control data and informs the control data processing means 33 that the control data is control data of a screen erasure request.
The clearing means 50 constituting the control data processing means 33 includes:
It instructs the LCD driver 7 to erase the screen.

As described above, according to the fifth embodiment of the present invention, radio communication terminal 110a, radio communication terminal 110
b, wireless communication terminal 110c and wireless communication terminal 110d
Can not only write handwritten images on a single shared screen, but also use terminal identifiers to display handwritten images only on wireless communication terminals desired by users on the network. Become. Furthermore, the provision of the clearing means 50 makes it possible to delete one shared screen from any wireless communication terminal, which is extremely useful.

(Sixth Embodiment) FIG. 6 shows a sixth embodiment of the present invention.
FIG. 3 is a block diagram for explaining an embodiment of the present invention.
This is an example in which the present invention is applied to the ettooth protocol.

In FIG. 6, 1 is retransmission means, 2 is DLC
Database 3, master-slave storage means 4, tablet 5, tablet driver 6, LCD 6 and L 7
A CD driver, 8 is a protocol stack, 9 is a communication module, 20 is a terminal identifier database, 21 is a terminal identifier determining unit, 22 is a switch, 23 is a terminal identifier adding unit, and 60 is a display color setting unit.

Also, 10 constituting the retransmission means 1 is a DLC
The setting means 11 is a switch.

FIG. 9 is a block diagram of the communication module 9. In FIG. 9, reference numeral 91 denotes an LM (link manager);
92 is a BB (baseband logic) 93 is an RF (high frequency circuit), and 94 is an antenna.

FIG. 10 is a stack configuration diagram of the protocol stack 8. In FIG. 10, reference numeral 101 denotes an HCI (host controller interface), and reference numeral 102 denotes an L2CA.
P (logical link), 103 is RFCOMM (virtual COM)
Ports) and 104 are SDP (Service Discovery Protocol).

FIG. 11A is a diagram illustrating a state in which a plurality of wireless communication terminals form a network. In FIG. 11A, a wireless communication terminal 110a is a master,
b, 110c, and 110d are wireless communication terminals that are slaves. 110a, 110b, 110c in the figure,
And 110d all have the configuration of FIG.

FIG. 8A is an explanatory diagram of a frame structure when a terminal identifier is used. In FIG. 8A, reference numeral 80 denotes a calling terminal identifier, 81 denotes a called terminal identifier, 83 denotes X-axis coordinate data, and 84 denotes Y-axis coordinate data.

The operation will be described below with reference to FIGS. 6, 8a, 9, 10, and 11a. Wireless communication terminal 110a
Are the masters, wireless communication terminals 110b, 110c, and 1
10d as a slave, a wireless link having a link identifier DLC = 1 between the wireless communication terminal 110a and the wireless communication terminal 110b, and the wireless communication terminal 110a and the wireless communication terminal 110c.
It is assumed that a wireless link having a link identifier DLC = 3 is provided between the wireless communication terminals 110a and 110d, and a wireless link having a link identifier DLC = 5 is provided between the wireless communication terminals 110a and 110d, thereby forming a star network. ing.

[0160] Consider a case where a user having the wireless communication terminal 110b writes a handwritten image on the tablet 4. The handwritten image is converted by the tablet driver 5 into a coordinate data sequence. The coordinate data string is passed to the LCD driver 7 and displayed on the LCD 6. At the same time, the terminal identifier adding means 23 adds the originating terminal identifier, which is the terminal identifier of the distribution source, and the destination terminal identifier, which indicates the terminal identifier of the distribution destination, to the coordinate data sequence, and passes it to the protocol stack 8. The structure of the frame passed to the protocol stack 8 is shown in FIG.

Here, the originating terminal identifier is the terminal identifier of the terminal itself, and the destination terminal identifier is the terminal identifier of the partner terminal to be distributed. The terminal identifier of each wireless communication terminal on the network is stored in the terminal identifier database 20. Each time the network configuration changes, the terminal identifier database 20 is updated. More specifically, in a terminal terminal identifier determining means 21 described later, the terminal identifier database 2
When a new terminal identifier that is not registered as 0 is detected, the terminal identifier is additionally registered in the terminal identifier database 20. When all wireless links are disconnected, the wireless communication terminal determines that it has left the network, and deletes terminal identifiers other than the terminal identifier of the terminal itself from the terminal identifier database 20.

The coordinate data sequence sent to the RFCOMM 103, which is the uppermost layer of the protocol stack 8, includes a link identifier for the master wireless communication terminal 110a, and a DL.
When C = 1, it is passed to the L2CAP 102 of the lower layer. Thereafter, the packet is packetized by the L2CAP 102 and further transmitted to the lower layer HCI 101. The HCI 101 performs fragmentation for sending data to the communication module 9. The data sent to the communication module 9 is modulated by the BB 92 and then transmitted to the air by the RF 93 and the antenna 94.

On the other hand, the master radio communication terminal 110a
, The RFCOMM 10
The coordinate data is passed from 3 to the higher order. Whether the coordinate data is coordinate data addressed to the own terminal is determined by the terminal identifier determining means 21 based on the destination terminal identifier, and if it is addressed to the own terminal, the SW 22 is turned on. Then, the coordinate data is displayed as a handwritten image on the LCD 6 via the LCD driver 7. At the same time, since the master-slave storage unit of the wireless communication terminal 110a stores that it is a master, the switch 11 constituting the retransmission unit 1 is on.
Therefore, the received coordinate data is set by the DLC setting means 10 to link identifiers DLC = 3 and DLC = 5 corresponding to the remaining wireless links constituting the network, and is passed to the protocol stack 8.

As a result, the coordinate data distributed by the wireless communication terminal 110b to the wireless communication terminal 110a via the wireless link with the link identifier DLC = 1 is transmitted by the master wireless communication terminal 110a via the wireless link with the link identifier DLC = 3. The packet is retransmitted to the communication terminal 110b, and is retransmitted to the radio communication terminal 110c through the radio link with the link identifier DLC = 5.

Radio communication terminal 110c and radio communication terminal 110d use the same RFCO as radio communication terminal 110a.
The coordinate data is passed from the MM 103 to a higher order. Whether the coordinate data is coordinate data addressed to the own terminal is determined by the terminal identifier determining means 21 based on the destination terminal identifier, and if it is addressed to the own terminal, the SW 22 is turned on. Then, the coordinate data is displayed as a handwritten image on the LCD 6 via the LCD driver 7. Here, since the master-slave storage units of the wireless communication terminals 110c and 110d store that they are slaves, the switch 11 constituting the retransmission unit 1 is off. Therefore, the received coordinate data is not retransmitted.

Here, if a value indicating all terminals is defined in advance as a terminal identifier, coordinate data can be sent to all wireless communication terminals on the network without specifying a delivery destination.

On the other hand, the calling terminal identifier obtained by the terminal identifier determining means 21 is sent to the display color setting means 60. The display color setting means 60 determines a display color for each calling terminal identifier,
Set to D driver 7.

As described above, according to the sixth embodiment of the present invention, radio communication terminal 110a, radio communication terminal 110
b and the wireless communication terminal 110c not only operate as if writing a handwritten image on a single shared screen, but also use the terminal identifier to copy the handwritten image only to the wireless communication terminal desired by the user on the network. It can be displayed. Further, by providing the display color setting means 60, the display color of the handwritten image drawing can be color-coded for each terminal to which the handwritten image is written, which is extremely useful.

(Seventh Embodiment) FIG. 7 shows a seventh embodiment of the present invention.
FIG. 3 is a block diagram for explaining an embodiment of the present invention.
This is an example in which the present invention is applied to the ettooth protocol.

In FIG. 7, 1 is retransmission means, 2 is DLC
Database 3, master-slave storage means 4, tablet 5, tablet driver 6, LCD 6 and L 7
A CD driver, 8 is a protocol stack, 9 is a communication module, 20 is a terminal identifier database, 21 is a terminal identifier determining unit, 22 is a switch, and 23 is a terminal identifier adding unit.

Also, 10 constituting the retransmission means 1 is a DLC
The setting means 11 is a switch.

FIG. 9 is a block diagram of the communication module 9. In FIG. 9, reference numeral 91 denotes an LM (link manager);
92 is a BB (baseband logic) 93 is an RF (high frequency circuit), and 94 is an antenna.

FIG. 10 is a stack configuration diagram of the protocol stack 8. In FIG. 10, reference numeral 101 denotes an HCI (host controller interface), and reference numeral 102 denotes an L2CA.
P (logical link), 103 is RFCOMM (virtual COM)
Ports) and 104 are SDP (Service Discovery Protocol).

FIG. 11A is a diagram illustrating a state in which a plurality of wireless communication terminals form a network. In FIG. 11A, a wireless communication terminal 110a is a master,
b, 110c, and 110d are wireless communication terminals that are slaves. 110a, 110b, 110c in the figure,
And 110d all have the configuration of FIG.

FIG. 8A is an explanatory diagram of a frame structure when a terminal identifier is used. In FIG. 8A, reference numeral 80 denotes a calling terminal identifier, 81 denotes a called terminal identifier, 83 denotes X-axis coordinate data, and 84 denotes Y-axis coordinate data.

The operation will be described below with reference to FIGS. 7, 8A, 9, 10, and 11A. Wireless communication terminal 110a
Are the masters, wireless communication terminals 110b, 110c, and 1
10d as a slave, a wireless link having a link identifier DLC = 1 between the wireless communication terminal 110a and the wireless communication terminal 110b, and the wireless communication terminal 110a and the wireless communication terminal 110c.
It is assumed that a wireless link having a link identifier DLC = 3 is provided between the wireless communication terminals 110a and 110d, and a wireless link having a link identifier DLC = 5 is provided between the wireless communication terminals 110a and 110d, thereby forming a star network. ing.

[0177] Consider a case where a user having the wireless communication terminal 110b writes a handwritten image on the tablet 4. The handwritten image is converted by the tablet driver 5 into a coordinate data sequence. The coordinate data string is passed to the LCD driver 7 and displayed on the LCD 6. At the same time, the terminal identifier adding means 23 adds the originating terminal identifier, which is the terminal identifier of the distribution source, and the destination terminal identifier, which indicates the terminal identifier of the distribution destination, to the coordinate data sequence, and passes it to the protocol stack 8. The structure of the frame passed to the protocol stack 8 is shown in FIG.

Here, the originating terminal identifier is the terminal identifier of the terminal itself, and the destination terminal identifier is the terminal identifier of the partner terminal to be distributed. The terminal identifier of each wireless communication terminal on the network is stored in the terminal identifier database 20. Each time the network configuration changes, the terminal identifier database 20 is updated. More specifically, in a terminal terminal identifier determining means 21 described later, the terminal identifier database 2
When a new terminal identifier that is not registered as 0 is detected, the terminal identifier is additionally registered in the terminal identifier database 20. When all wireless links are disconnected, the wireless communication terminal determines that it has left the network, and deletes terminal identifiers other than the terminal identifier of the terminal itself from the terminal identifier database 20.

The coordinate data sequence sent to the RFCOMM 103, which is the uppermost layer of the protocol stack 8, includes a link identifier for the master wireless communication terminal 110a, and a DL.
When C = 1, it is passed to the L2CAP 102 of the lower layer. Thereafter, the packet is packetized by the L2CAP 102 and further transmitted to the lower layer HCI 101. The HCI 101 performs fragmentation for sending data to the communication module 9. The data sent to the communication module 9 is modulated by the BB 92 and then transmitted to the air by the RF 93 and the antenna 94.

On the other hand, the master radio communication terminal 110a
, The RFCOMM 10
The coordinate data is passed from 3 to the higher order. Whether the coordinate data is coordinate data addressed to the own terminal is determined by the terminal identifier determining means 21 based on the destination terminal identifier, and if it is addressed to the own terminal, the SW 22 is turned on. The coordinate data is transferred to the L through the coordinate data buffer 70 and the LCD driver 7.
It is displayed as a handwritten image on CD6. At the same time, since the master-slave storage unit of the wireless communication terminal 110a stores that it is a master, the switch 11 constituting the retransmission unit 1 is on. Therefore, the received coordinate data is stored in the DLC setting means 10 as the link identifier DL corresponding to the remaining wireless link constituting the network.
C = 3 and DLC = 5 are set and passed to the protocol stack 8.

As a result, the coordinate data distributed by the wireless communication terminal 110b to the wireless communication terminal 110a through the wireless link with the link identifier DLC = 1 is transmitted by the master wireless communication terminal 110a through the wireless link with the link identifier DLC = 3. The packet is retransmitted to the communication terminal 110b, and is retransmitted to the radio communication terminal 110c through the radio link with the link identifier DLC = 5.

The wireless communication terminal 110c and the wireless communication terminal 110d use the same RFCO as the wireless communication terminal 110a.
The coordinate data is passed from the MM 103 to a higher order. Whether the coordinate data is coordinate data addressed to the own terminal is determined by the terminal identifier determining means 21 based on the destination terminal identifier, and if it is addressed to the own terminal, the SW 22 is turned on. The coordinate data is displayed as a handwritten image on the LCD 6 via the coordinate data buffer 70 and the LCD driver 7. Here, the wireless communication terminal 110c and the wireless communication terminal 110
Since the master-slave storage means d stores the fact that it is a slave, the switch 11
Is off. Therefore, the received coordinate data is not retransmitted.

Here, if a value indicating all terminals is defined in advance as a terminal identifier, coordinate data can be sent to all wireless communication terminals on the network without specifying a delivery destination.

Radio communication terminal 110a, radio communication terminal 11
0c and the wireless communication terminal 110d, the coordinate data buffer 70 stores coordinate data in association with the calling terminal identifier obtained by the terminal identifier determining means 21. As a result, the user of each wireless communication terminal can specify the originating terminal identifier of the coordinate data to delete or highlight it. Further, by increasing the number of surfaces of the buffer, it becomes possible to delete coordinate data written in the past.

As described above, according to the seventh embodiment of the present invention, radio communication terminal 110a, radio communication terminal 110
b and the wireless communication terminal 110c not only operate as if writing a handwritten image on a single shared screen, but also use the terminal identifier to copy the handwritten image only to the wireless communication terminal desired by the user on the network. It can be displayed. Further, the provision of the coordinate data buffer 70 makes it possible to erase and highlight the handwritten image by designating the writing source, which is extremely useful.

[0186] In this embodiment, the wireless communication terminal that inputs a handwritten image from a tablet and displays the handwritten image on a screen has been described. However, the present invention is not limited to this. The wireless communication terminal may be a device that inputs graphic data or shape data used in CAD or the like and displays the data on a screen. In this case, the handwritten image in the above embodiment is to be read as graphic data or shape data. The wireless communication terminal device may be a device that inputs document data and displays the document data on a screen. In this case, the handwritten image in the above embodiment is read as document data. In short, the wireless communication terminal of the present embodiment may handle data other than the handwritten image.

Furthermore, the switch 22 of the present embodiment is an example of the information selecting means of the present invention.

Further, the present invention is a program for causing a computer to execute the functions of all or a part of the above-described wireless communication terminal of the present invention (or an apparatus, an element, a circuit, a unit, etc.), A program that operates in cooperation with a computer.

Note that some means (or devices, elements, circuits, units, and the like) of the present invention mean some of the plurality of means or one of the means. Means some functions or some operations.

A computer-readable recording medium on which the program of the present invention is recorded is also included in the present invention.

[0191] One use form of the program of the present invention may be such that the program is recorded on a computer-readable recording medium and operates in cooperation with the computer.

[0192] One use form of the program of the present invention may be a form in which the program is transmitted through a transmission medium, read by a computer, and operates in cooperation with the computer.

[0193] The recording medium includes a ROM and the like, and the transmission medium includes a transmission medium such as the Internet, light, radio waves, and sound waves.

As described above, the configuration of the present invention may be realized by software or hardware.

[0195]

As is apparent from the above description, in a wireless communication terminal forming a network by establishing a wireless link with a plurality of slave wireless communication terminals with respect to one master wireless communication terminal. Thus, it is possible to provide a wireless communication terminal and a program that operate as if writing a handwritten image on one shared screen.

[0196] Further, the present invention uses a terminal identifier in a wireless communication terminal forming a network by establishing a wireless link by a plurality of slave wireless communication terminals with respect to one master wireless communication terminal. Accordingly, it is possible to provide a wireless communication terminal capable of displaying a handwritten image only on a wireless communication terminal desired by a user on a network, and a program.

Further, according to the present invention, a plurality of slave wireless communication terminals form a network by establishing a wireless link with respect to one master wireless communication terminal. By
It is possible to provide a wireless communication terminal and a program that can refer to a wireless communication terminal that is already a slave whether or not to grant participation permission to a wireless communication terminal that wants to newly become a slave.

The present invention also relates to a wireless communication terminal which forms a network by establishing a wireless link with a plurality of slave wireless communication terminals with respect to one master wireless communication terminal. A wireless communication terminal and a program can be provided that allow all wireless communication terminals on the network to know the disconnection.

Further, according to the present invention, a plurality of slave wireless communication terminals establish a wireless link with respect to one master wireless communication terminal, and a wireless communication terminal forming a network forms one shared screen. Can be provided from any wireless communication terminal.

Further, according to the present invention, a handwritten image is written in a wireless communication terminal forming a network by establishing a wireless link with a plurality of slave wireless communication terminals with respect to one master wireless communication terminal. It is possible to provide a wireless communication terminal and a program that can color-code a display color of handwritten image drawing for each terminal.

Further, according to the present invention, in a wireless communication terminal forming a network by establishing a wireless link with a plurality of slave wireless communication terminals with respect to one master wireless communication terminal, a handwritten image is written by a wireless communication terminal. Can be provided and a program that can be erased and highlighted can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram of a wireless communication terminal according to a first embodiment of the present invention.

FIG. 2 is a block diagram of a wireless communication terminal according to a second embodiment of the present invention;

FIG. 3 is a block diagram of a wireless communication terminal according to a third embodiment of the present invention.

FIG. 4 is a block diagram of a wireless communication terminal according to a fourth embodiment of the present invention.

FIG. 5 is a block diagram of a wireless communication terminal according to a fifth embodiment of the present invention.

FIG. 6 is a block diagram of a wireless communication terminal according to a sixth embodiment of the present invention.

FIG. 7 is a block diagram of a wireless communication terminal according to a seventh embodiment of the present invention.

FIG. 8A is a diagram illustrating a frame structure according to the second, sixth, and seventh embodiments of the present invention. FIG. 8B is a diagram illustrating a frame structure according to the third, fourth, and fifth embodiments of the present invention.

FIG. 9 is a block diagram of a Bluetooth communication module.

FIG. 10 is a stack configuration diagram of a Bluetooth protocol stack.

11A is a diagram illustrating a state in which a plurality of wireless communication terminals form a network according to the first, second, fourth to seventh embodiments of the present invention. FIG. 11B is a diagram illustrating a third embodiment of the present invention. Diagram illustrating a state in which a plurality of wireless communication terminals in the embodiment form a network

[Explanation of symbols]

 1, resending means 2, DLC database 10, DLC setting means 20, terminal identifier database 21, terminal identifier determining means 30, control flag determining means 32, control data analyzing means 33, control data processing means 34, payload generating means 35, INQ Operation permission means 36, PAGE operation permission means 50, clear means 60, display color setting means 70, coordinate data buffer

Claims (19)

[Claims] 1. A wireless communication terminal that performs wireless communication with a master wireless communication terminal using a network formed by establishing a wireless link with a plurality of slave wireless communication terminals, A wireless communication terminal including retransmission means for retransmitting information from a slave wireless communication terminal to another slave wireless communication terminal when performing wireless communication as a master. 2. A wireless communication terminal according to claim 2, further comprising: a DLC database storing link identifiers assigned to the wireless links for identifying each wireless link on the network. The wireless communication terminal according to claim 1, further comprising a DLC setting unit configured to set another link identifier stored in the DLC database in the information instead of the link identifier set in the information when retransmitting the information. 3. When performing wireless communication as a master or a slave, when receiving the information, a terminal identifier determining means for determining whether the information is addressed to the terminal itself, and based on the determination result, A terminal identifier for identifying each of the wireless terminals is assigned to each of the wireless communication terminals on the network, and the information includes at least a delivery destination of the information. 2. The wireless communication terminal according to claim 1, wherein a terminal identifier is added, and wherein said terminal identifier determining means performs said determination based on a terminal identifier of a distribution destination of said information added to said information. 4. The wireless communication terminal according to claim 3, wherein a terminal identifier of a distribution source of the information is added to the information. 5. When performing wireless communication as a master or a slave, when receiving the information, a control flag determining means for determining whether the payload of the information is control data or data of an upper layer, and controlling the payload of the information by controlling the payload of the information. In the case of data, control data analysis means for analyzing the payload thereof, and control data processing means for performing predetermined processing based on the analysis result, wherein the information is that the payload of the information is control data or an upper layer. The wireless communication terminal according to claim 1, further comprising a control flag indicating whether the data is data, wherein the control flag determination unit performs the determination based on the control flag. 6. A wireless communication terminal that performs wireless communication with a master wireless communication terminal using a network formed by establishing a wireless link with a plurality of slave wireless communication terminals, When performing wireless communication as a master or a slave, when receiving information from another wireless communication terminal of the network, a control flag determination unit that determines whether the payload of the information is control data or data of an upper layer, When the payload of the information is control data, the control data analyzing means for analyzing the payload, and control data processing means for performing a predetermined process based on the analysis result, wherein the information is a control data Or a control flag indicating whether it is data of an upper layer, and the control flag determination unit includes: Wireless communication terminal which performs the determination based on the serial control flag. 7. When the wireless communication is performed as a master, the control data is used to inquire the wireless communication terminal as a slave whether or not to grant permission to join a wireless communication terminal that wants to newly become a slave. The wireless communication terminal according to claim 5, wherein: 8. The wireless communication terminal according to claim 7, wherein when performing wireless communication as a slave, said control data is used when responding to an inquiry as to whether or not to give said participation permission. 9. The wireless communication terminal according to claim 7, wherein the participation permission is permission to perform an operation of finding a wireless communication terminal desiring to become a new slave. 10. The wireless communication terminal according to claim 7, wherein the participation permission is to permit establishment of a wireless link with the wireless communication terminal desiring to newly become a slave. 11. When performing wireless communication as a slave,
The wireless communication according to claim 9, further comprising an operation permission unit that permits the operation, and wherein the control data processing unit includes a control payload generation unit that generates the control data based on a result of the permission. Terminal. 12. When performing wireless communication as a master, the wireless communication apparatus includes disconnection detection means for detecting disconnection of a wireless link, and disconnection of a wireless link with a wireless communication terminal as a slave.
The wireless communication terminal according to claim 5, wherein notification is made to another wireless communication terminal that is a slave. 13. The control data processing means includes a control payload generating means for generating the control data, and a terminal identifier of the wireless communication terminal whose wireless link has been disconnected is included in a payload of the generated control data. The wireless communication terminal according to claim 12, which is included. 14. A tablet for generating coordinate data according to a user's handwritten input, and an LCD for displaying handwritten trajectories of itself and another wireless communication terminal on the network based on the coordinate data.
The wireless communication terminal according to claim 1, wherein the information includes the coordinate data, and a display screen of the LCD is shared with another wireless communication terminal. 15. A tablet for generating coordinate data according to a user's handwritten input, and an LCD for displaying handwritten trajectories of itself and another wireless communication terminal on the network based on the coordinate data.
The information also includes the coordinate data, the display screen of the LCD is shared with another wireless communication terminal, and the control data processing means includes a clearing means for erasing a locus displayed on the LCD. The wireless communication terminal according to claim 5, wherein the predetermined wireless communication terminal on the network can erase the shared screen. 16. A tablet for generating coordinate data according to a user's handwritten input, and an LCD for displaying handwritten trajectories of itself and another wireless communication terminal on the network based on the coordinate data.
The display screen of the LCD further includes display color setting means capable of setting a locus display color on the LCD according to the terminal identifier shared with another wireless communication terminal, and the information includes the coordinate data. 15. The wireless communication terminal according to claim 3, wherein the handwritten locus displayed on the LCD is displayed in a color-coded manner according to a terminal identifier of a distribution source. 17. A tablet for generating coordinate data according to a user's handwritten input, and an LCD for displaying a handwritten locus of itself and another wireless communication terminal on the network based on the coordinate data.
And a coordinate data buffer for buffering coordinate data for each terminal identifier, wherein the information also includes the coordinate data, a display screen of the LCD is shared with another wireless communication terminal, and displayed on the LCD. The handwritten locus to be deleted can be individually deleted for each terminal identifier of the distribution source.
A wireless communication terminal according to claim 1. 18. The wireless terminal device according to claim 1, wherein when performing wireless communication as a master, all or one of retransmission means for retransmitting information from a wireless communication terminal as a slave to another wireless communication terminal as a slave. A program that causes a computer to function as a unit. 19. When performing wireless communication as a master or a slave of the wireless communication terminal according to claim 6, when receiving information from another wireless communication terminal of the network,
Control flag determining means for determining whether the information payload is control data or upper layer data; control data analyzing means for analyzing the payload when the information payload is control data; and A program for causing a computer to function as all or a part of control data processing means for performing predetermined processing.