WO2003105361A1 - 通信方法、通信システム及び通信機器 - Google Patents
通信方法、通信システム及び通信機器 Download PDFInfo
- Publication number
- WO2003105361A1 WO2003105361A1 PCT/JP2003/007135 JP0307135W WO03105361A1 WO 2003105361 A1 WO2003105361 A1 WO 2003105361A1 JP 0307135 W JP0307135 W JP 0307135W WO 03105361 A1 WO03105361 A1 WO 03105361A1
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- WIPO (PCT)
- Prior art keywords
- communication
- inquiry message
- communication device
- message
- inquiry
- Prior art date
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/80—Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks
Definitions
- the present invention relates to a communication method suitable for being applied to a communication method for performing relatively short-range wireless communication, a communication system that executes the communication method, and a communication device applied to the communication system.
- Bluetooth registered trademark
- Short-range wireless communication systems that use relatively high-frequency wireless signals, such as Bluetooth communication, have advantages over infrared communication systems that use infrared signals, such as poor directivity and high transparency. It is expected that the number of compatible devices will increase in the future.
- the device that wants to start communication sends an inquiry message to discover nearby devices as a broadcast message. Then, the device that has received the inquiry message from the device A returns a response message to the device A to the inquiry message.
- Is device A a device that exists in the vicinity? By sequentially receiving these response messages, it is possible to discover a plurality of devices that can communicate with each other in the surrounding area.
- Device A selects and specifies the device to be connected according to the information in these response messages, and executes the connection process for that device. In this case, when response messages from a plurality of devices are received, the response messages are usually displayed in a list form so that the user can make a selection.
- Profiles include a serial port profile that implements serial communication and a personalized networking profile that implements a personal area network.
- a service discovery protocol (hereinafter referred to as SDP) is specified as a procedure for determining these profiles and what services are actually implemented.
- Device A sends an inquiry message according to the SDP to the device to be connected (hereinafter referred to as device B) as to what kind of service is provided by device B, and device B sends a message from device A. It receives the inquiry message and sends information related to the service that it can provide to the inquiry to device A as a response message. Device A that has received the response message makes a communication request for the service if device B provides the desired service, and the desired service between device A and device B is started. It will be.
- the basic communication procedure in Bluetooth communication is as follows: device A first transmits an inquiry message to discover surrounding devices and receives a response message in response to the inquiry message. In addition, a desired device is selected from the devices that responded, an inquiry is made as to whether the device has a desired service, and a communication request for the service is made.
- Bluetooth SIG Inc. The Bluetooth standard is managed by Bluetooth SIG Inc., and a detailed specification is issued by Bluetooth SIG Inc.
- inquiry messages for discovering nearby devices are targeted at all devices within the communicable range (for example, 10 meters to 100 meters). Becomes Therefore, when there are many communicable devices around, a huge number of response messages will be received. Normally, it is necessary to present the device information contained in the response message by displaying it on a display or the like, and the user must select the desired device. If there is, the user spends a great deal of time on the selection operation, which is inconvenient. In addition, in order to determine whether the device is a device to which the user really wants to connect, it is necessary to check information such as the ID provided by the device, which may impose an excessive burden on the user. was there.
- Japanese Patent Application Laid-Open No. 2002-1444781 discloses a method for efficiently finding a device to be connected by changing the reach of an inquiry message. It suggests how to do it. According to this method, by setting the device search range to, for example, a short distance, the devices to be discovered can be limited, and the device to be connected can be efficiently specified.
- the present invention has been made in view of such a situation, and makes it possible to easily and reliably implement a communication service between devices when performing wireless communication typified by Bluetooth communication. Its purpose is to do so. Disclosure of the invention
- the first communication device in a communication method including at least a first and a second communication device and performing wireless communication according to a predetermined communication method between the respective communication devices, includes: When the connection operation of the second communication device is performed, the transmission range is limited to a short distance, and an inquiry message for finding the device to be connected for wireless communication is transmitted wirelessly. Then, when a predetermined standby operation is performed, an inquiry message is received, a response message to the received inquiry message is wirelessly transmitted, and the first communication device transmits the response message. When receiving a message, a connection process is performed with the second communication device. By doing so, the communication partner can be specified by bringing the devices to be connected closer together and pressing the connection button on both sides, so that it is easy and reliable to specify Communication between devices can be established.
- the processing for limiting the transmittable distance to a short distance is performed by setting the transmission power to a value that is more limited than the transmission power during normal wireless communication. Process. This By doing so, the transmittable distance can be limited to a short distance due to transmission power restrictions.
- a third invention is the communication method according to the first invention, wherein the wireless transmission of the inquiry message by a predetermined connection operation and / or the reception of the inquiry message by a predetermined standby operation are provided in each communication device. It is designed to be executed while operating the operating means intermittently. With this configuration, the inquiry message can be transmitted or received satisfactorily by a continuous operation.
- a fourth invention in the communication method of the first invention, after the connection process, a data transfer process according to a program being executed on the first or second communication device is executed. By doing so, the data transfer process is executed with good timing.
- the second communication device can receive only the inquiry message wirelessly transmitted from a short distance by reducing the reception sensitivity of the inquiry message. It is a thing. By doing so, it becomes possible to easily receive only inquiry messages transmitted wirelessly from a short distance.
- connection operation in the first communication device and the standby operation in the second communication device are common operations, and the common operation is
- transmission processing of the inquiry message and reception processing of the inquiry message are performed alternately.
- the processing for transmitting the inquiry message and the processing for receiving the inquiry message can be performed by one operation.
- a seventh invention is the communication method according to the first invention, wherein the connection operation in the first communication device is a limited inquiry message that can be distinguished from the type of the inquiry message, and the second communication device The limited question It is designed to wait for a matching message. By doing so, transmission processing of the limited inquiry message becomes possible.
- the connection operation in the first communication device is configured to select a general-purpose or arbitrary limited inquiry message to be transmitted,
- the second communication device selects a general-purpose or arbitrary limited inquiry to be awaited. By doing so, it is possible to transmit a general-purpose inquiry message and a limited inquiry message.
- the first communication device includes: Communication processing means for transmitting and receiving wireless signals, connection operation means, and when the connection operation means is operated, an inquiry message is transmitted from the communication processing means with the transmittable distance limited to a short distance. And a control unit for performing a connection process when a response message to the inquiry message is received, and a transmission and reception of a radio signal as a second communication device.
- the communication partner can be specified by bringing the devices to be connected closer together and pressing the connection button on both sides, so that it is easy and sure to specify Communication between the devices can be established.
- the tenth aspect of the present invention is the communication system according to the ninth aspect, wherein:
- the process of limiting the transmittable distance to a short distance is a process of setting the transmission power of the communication processing unit to a value that is more restricted than the transmission power during normal wireless communication. By doing so, the transmission distance can be limited to a short distance due to the transmission power limitation.
- the eleventh invention is a communication system according to the ninth invention, wherein the control means of the first communication device transmits an inquiry message while the connection operation means of the first communication device is continuously operated.
- the control means of the second communication device receives the inquiry message while the standby operation means of the second communication device is continuously operated. By doing so, the inquiry message can be transmitted or received satisfactorily by continuous operation.
- the data according to the program being executed on the first or second communication device when the connection processing by the control means of the first communication device is completed, the data according to the program being executed on the first or second communication device. This is to execute the transfer process. By doing so, the data transfer processing is executed at a good timing.
- a thirteenth aspect of the present invention is the communication system according to the ninth aspect, wherein the communication processing means of the second communication device reduces only the sensitivity of the inquiry message reception so that only the inquiry message wirelessly transmitted from a short distance. It is designed to be able to receive By doing so, it is possible to easily receive only the inquiry message wirelessly transmitted from a short distance.
- connection operation means of the first communication device and the standby operation means of the second communication device are common operation means.
- the control means of each communication device communicates the inquiry message transmission processing and the inquiry message reception processing with each other. In such a case, the control for alternately executing is performed. By doing so, the processing of transmitting the inquiry message and the processing of receiving the inquiry message can be performed in one operation.
- a fifteenth invention is a communication system according to the ninth invention, wherein the inquiry message in the first communication device is a limited inquiry message that can be distinguished from a general-purpose inquiry message.
- the communication device is designed to wait for the limited inquiry message. By doing so, transmission processing of the limited inquiry message becomes possible.
- the connection operation in the first communication device is configured to select a general-purpose or arbitrary limited inquiry message to be transmitted.
- the second communication device selects a general-purpose or arbitrary limited inquiry to be awaited. This enables transmission of general-purpose inquiry messages and transmission of limited inquiry messages.
- a communication processing unit that transmits and receives a wireless signal, a connection operation unit, and a connection operation unit
- an inquiry message is transmitted from the communication processing means while the transmittable distance is limited to a short distance, and when a response message to the inquiry message is received, It has a message transmission source and control means for performing connection processing. By doing so, it is possible to easily and reliably establish communication with a specific device.
- the processing for limiting the transmittable distance to a short distance limits the transmission power of the communication processing means to be smaller than the transmission power during normal wireless communication.
- the specified value Is what makes sense. With this configuration, the transmission distance can be limited to a short distance due to the transmission power limitation.
- the control means performs a process of transmitting an inquiry message while the connection operation means is continuously operated. is there. By doing so, the inquiry message can be transmitted successfully by continuous operation.
- the communication device when the connection processing by the control means is completed, data transfer processing according to the program being executed is executed. By doing so, the data transfer processing is executed with good timing.
- the communication device includes a standby operation unit, and when the standby operation unit is operated, the control unit causes the communication processing unit to receive an inquiry message, The response message to the received inquiry message is wirelessly transmitted by the communication processing means. By doing so, the inquiry message can be received and the response message can be transmitted with one operation.
- the communication device further comprises a standby operation unit, and when the standby operation unit is operated, the control unit causes the communication processing unit to receive an inquiry message, A response message to the received inquiry message is transmitted wirelessly by the communication processing means, the connection operation means and the standby operation means are common operation means, and the control means is operated when the common operation means is operated.
- the control is such that the transmission processing of the inquiry message and the reception processing of the inquiry message are alternately executed by the communication processing means. By doing so, common The operation can be performed by operating the operation means.
- the connection operation means includes means for selecting a type of the inquiry message, so that the selected arbitrary type of inquiry message can be transmitted. It was done. By doing so, the inquiry message of the selected type can be sent.
- a communication device for performing wireless communication with another communication device by a predetermined communication method
- communication processing means for transmitting and receiving a radio signal
- standby operation means for transmitting and receiving a radio signal
- standby operation means for transmitting and receiving a radio signal
- standby operation means for transmitting and receiving a radio signal
- standby operation means for transmitting and receiving a radio signal
- standby operation means for transmitting and receiving a radio signal
- standby operation means for transmitting and receiving a radio signal
- standby operation means for receiving an inquiry message by the communication processing means when the user operates the communication processing means, and causing the communication processing means to wirelessly transmit a response message to the received inquiry message.
- the control unit performs a process of receiving an inquiry message while the standby operation unit is continuously operated. .
- the inquiry message can be successfully received by continuous operation.
- the communication processing means reduces reception sensitivity of the inquiry message so that the communication processing means can receive only the inquiry message wirelessly transmitted from a short distance. It was done. By doing so, it is possible to easily receive only inquiry messages wirelessly transmitted from a short distance.
- the waiting operation means includes a means for selecting an inquiry message to be awaited, and outputs the selected arbitrary type of inquiry message. It can be received. By doing so, it becomes possible to receive the inquiry message of the selected type.
- FIG. 1 is a perspective view showing an example of a communication device shape according to an embodiment of the present invention.
- FIG. 2 is a block diagram showing a configuration example of a communication device according to an embodiment of the present invention.
- FIG. 3 is a block diagram showing a configuration example of the wireless communication unit according to the embodiment of the present invention.
- FIG. 4 is an explanatory diagram showing a communication example according to an embodiment of the present invention.
- FIG. 5 is an explanatory diagram showing an example of an inquiry (an example without limitation) according to an embodiment of the present invention.
- FIG. 6 is an explanatory diagram showing an example of an inquiry (an example with limitations) according to an embodiment of the present invention.
- FIG. 7 is a flowchart showing a processing example at the time of operating the connection button according to the embodiment of the present invention.
- FIG. 8 is a flowchart showing a processing example at the time of operating the standby button according to the embodiment of the present invention.
- FIG. 9 is a flowchart showing a processing example after connection according to an embodiment of the present invention.
- FIG. 10 is a timing diagram showing a transmission example according to an embodiment of the present invention.
- FIG. 11 is an explanatory diagram showing a screen display example (initial state) on a terminal according to an embodiment of the present invention.
- FIG. 12 is an explanatory diagram showing an example of screen display (at the time of transmitting image data) on the terminal according to one embodiment of the present invention.
- FIG. 13 is an explanatory diagram showing an example of screen display (at the time of receiving image data) on the terminal according to one embodiment of the present invention.
- FIG. 14 is a perspective view showing an example of the shape of a communication device according to another embodiment of the present invention (an example in which one button is also used).
- Figure 15 is a timing diagram showing an example of transmission in the device of the example in Figure 14 o
- FIG. 16 is an explanatory diagram showing a communication example according to still another embodiment of the present invention (an example using a mobile phone and a personal computer device).
- Figure 17 is a timing diagram showing an example of transmission in the device of the example in Figure 16.
- This example is an example applied to a portable information terminal that performs wireless communication using Bluetooth communication, which is one of the relatively short-range wireless communication methods.
- FIG. 1 is a diagram showing an example of the external shape of the portable information terminal of the present example.
- the portable information terminal 10 of the present example includes a display panel 11 composed of a liquid crystal image display means or the like, and is configured to be able to display characters and figures on the display panel 11.
- the display panel 11 is configured as a touch panel so that an input operation can be performed by touching with a finger or an input pen.
- a connection button 17a and a standby button 17b are arranged as operation buttons. Other operation buttons may be arranged.
- the portable information terminal 10 is a device that can perform wireless communication by Bluetooth communication, which is one of the wireless communication methods, and is configured to transmit and receive data to and from other devices by Bluetooth wireless communication. ing.
- the connection button 17 a is a button for starting a wireless communication connection from the portable information terminal 10 to another device in the vicinity, and the standby button 17 b is a portable information terminal 10 from another device. This button is used to enter a state in which a request for wireless communication connection to the server can be accepted.
- FIG. 2 is a block diagram showing the internal configuration of the portable information terminal 10 of the present example.
- the touch panel input unit 12 is provided at the position where the display unit 11 is arranged, and touch input is performed by touching the surface of the display unit 11 with a finger or a pen. It has a configuration that can be used.
- the control unit 13 is constituted by a central control unit (CPU) and performs various control processes according to a program stored in the ROM 14 or the storage medium 23a mounted on the storage unit 23. By executing, the entire portable information terminal 10 is controlled.
- the RAM 15 stores programs used by the control unit 13 and temporary data during processing as needed.
- the storage medium 16a mounted on the storage section 16 is made up of a magnetic or optical storage medium or a semiconductor memory.
- the storage medium 16a may be composed of a plurality of storage media.
- the storage medium may be a storage medium fixed to the storage unit 16 or a storage medium that is freely detachable.
- the programs and data stored in the storage medium 16a may be received from another device connected via an arbitrary communication line.
- the storage medium 16a of another device connected via the line may be used as its own storage medium 16a.
- the display unit 11 is composed of, for example, a liquid crystal display panel and its drive circuit, and presents various information to the user according to an instruction from the control unit 13.
- the touch panel input unit 12 is integrated with the display unit 11 For example, the user's input position can be known by sensing pressure.
- the control unit 13 interprets various user operations based on the information displayed on the display unit 11 and the user's input operation on the touch panel input unit 12, and executes appropriate processing.
- the button input unit 17 includes the connection button 17a and the standby button 17b shown in FIG. 1, and the operation signal is sent to the control unit 13.
- the wireless communication unit 2 includes a processing circuit for processing wireless communication conforming to the Bluetooth standard, a control circuit for the processing circuit, and the like, and an antenna 19 is connected thereto.
- the communicable range of the wireless communication unit 20 is determined in advance by the transmission power, the antenna 19, and the like. According to the Bluetooth standard applied to the wireless communication unit 20, it is almost 10 meters. It is in the range of 100 meters. In this example, the radio communication unit 20 is described as having a communicable range of 10 meters, but may be of any distance.
- the blocks from the control unit 13 to the wireless communication unit 20 described above are connected to each other by a pass line 18 so that various data operation signals can be transmitted. According to 13, the portable information terminal 10 is appropriately controlled. In the following description, a part controlled by the control unit 13 is referred to as a host side when viewed from the wireless communication unit 20.
- FIG. 3 is a block diagram showing a configuration example of the wireless communication unit 20.
- the control unit 21 in the wireless communication unit 20 expands the control program stored in the ROM 22 into the RAM 23 and controls the operation of the entire wireless communication unit 20.
- the RAM 23 also stores temporary data and the like.
- the control program stored in the ROM 22 also stores information necessary for short-distance communication described later.
- the output setting value of the transmission amplifier in the transceiver 27 required for short-range wireless transmission is stored.
- the transmission power of the wireless transmission signal is reduced.
- the output is regulated.
- Information necessary for the short-range wireless communication may be stored in another storage means such as the flash memory 24.
- the flash memory 24 stores, for example, a device address unique to a Bluetooth standard communication device, a link key that is a common key used for authentication with each communication device, and the like. It is supplied to the control unit 21.
- the input / output interface 25 is an interface for exchanging data and instructions with the host, and is called a host control interface in Bluetooth communication.
- the input / output interface 25 supplies the data and instructions supplied via the bus line 18 shown in FIG. 2 to the control unit 21 and the baseband control unit 26, and conversely, the control The data from the unit 21 and the baseband control unit 26 are supplied to the control unit 13 via the bus line 18.
- the baseband control unit 26 provides the data supplied from the input / output interface 25 to the transceiver unit 27 for wireless transmission. Further, the signal supplied from the transceiver unit 27 is digitized and supplied to the host via the input / output interface 25.
- various controls such as link, packet, logical channel, security, etc., error correction coding, decoding, and data randomization are also performed.
- the transceiver unit 27 frequency-hopping-modulates the digital data supplied from the baseband control unit 26, controls the power, and transmits the data wirelessly via the antenna 19.
- data received via the antenna 19 is frequency-hopped to generate a correlation, take a correlation, reduce interference components with a filter, and perform FSK demodulation.
- the digital data is supplied to the baseband controller 26.
- the blocks from the control unit 21 to the baseband control unit 26 in the wireless communication unit 20 are connected to each other by a pass line 28 so that various data and operation signals can be transmitted.
- the control unit 21 appropriately controls the wireless communication unit of the Bluetooth standard.
- FIG. 4 two portable information terminals 10a and 10b having the same configuration as the portable information terminal 10 are prepared, and the two portable information terminals 10b are used. a and the portable information terminal 10b are very close to each other, press the connection button 17a on one portable information terminal 10a, and the standby button 17 on the other portable information terminal 10b. Press b to start wireless communication only between the two mobile information terminals 10a and 10b that are close to each other, and execute an appropriate service. I have. In this case, even if another Bluetooth-standard communication terminal exists within a range where wireless communication with the portable information terminal 10a is possible, the standby button 17b is operated while the connection button 17a is operated. It is not connected to communication terminals other than the operated terminal 10b.
- FIG. 5 is a schematic diagram of a case where an inquiry message is transmitted with normal transmission output.
- a plurality of terminals M 1, M 2, M 3, M 4, M 5, and M 6 configured as terminals having the same configuration as the portable information terminal 10 or another configuration of the Bluetooth standard are included. This indicates that it exists. here Has the same configuration as the portable information terminal 10 at least for the terminals Ml and M2.
- terminal Ml is a portable information terminal that has transmitted an inquiry message with normal transmission output, and terminals M2, M3, and M5 are in a state of waiting to be able to respond. It is assumed that the terminal M 6 is not in a waiting state.
- the terminal Ml can send an inquiry message within a range of 10 meters around the terminal.
- this inquiry message is sent, devices that are within a circle of radius 10 meters around terminal M1 and that are in a standby state to respond to inquiries from other devices Is the terminal that made the inquiry
- terminal M1 does not know on which frequency channel the device in the standby state is waiting at which timing, so that appropriate timing and time are set so as to cover all frequency channels in a certain period.
- Frequency hopping in sequence. In Bluetooth communication, a value of about 10 seconds is recommended as a value necessary to collect a sufficient number of responses from the surroundings.
- devices in a standby state can receive an inquiry message by appropriately performing frequency hopping. As a result, when the timing and frequency channel of the inquiry message match the timing and frequency channel of the device in the standby state, the device in the standby state can receive the inquiry message, and Further, a response message can be transmitted at an appropriate timing.
- the terminal M1 is within a radius of 10 meters around the terminal Ml by continuing the inquiry processing for, for example, about 10 seconds, and Respond to inquiry messages
- the response message is received from the waiting device, that is, the terminals M2, M3, and M5.
- terminal M 6 is not in a responsive state and does not respond, and terminal M 4 : cannot receive the inquiry message because it exceeds the reach of the message.
- the user usually determines which of the three devices to connect to by using information that can be individually identified, for example, a device name arbitrarily assigned to the device, or a unique device for each device. It is necessary to select based on the dress (Bluetooth device address).
- Fig. 6 shows a schematic diagram of a situation in which a limited inquiry message is transmitted only for a short distance. Also in the example of FIG. 6, it is assumed that the terminal M 6 is not in a responsive state and the other terminals are in a responsive state.
- the terminal M1 can communicate with the terminal M1 more than usual by a special instruction by the user (specifically, for example, pressing the connection button 17a), for example, by reducing the transmission power more than usual.
- the range is narrowed so that communication messages can be transmitted only over a very short distance.
- the transmission power and other restrictions are set so that messages can be transmitted only within a circle with a radius of about 15 cm around the terminal M1.
- the terminal M2 exists within a range of a radius of about 15 cm from the terminal Ml.
- the transmission distance is limited to a short distance, it is said that the transmission distance is limited to the range of about 15 cm.
- the transmission power is reduced. This can be achieved by lowering by about 60 to 70 dB.
- a limited inquiry message is a query that is used exclusively for a specific purpose that can be distinguished from general inquiry messages that can be answered by all communication devices that can respond to the inquiry message. However, it is assumed that this limited inquiry message is responded only to a device that is in a state capable of waiting for the limited inquiry message. Note that the limited inquiry message does not necessarily have to be of one type, and a plurality of types can be provided.
- IAC Inquiry Access Code
- GIAC General IAC
- DIAC Dedicated IAC
- the device makes it possible to set the device so that it can respond to the limited inquiry only for a short limited period.
- a GIAC inquiry as a general inquiry
- an LIAC inquiry as a limited inquiry.
- the limited inquiry may be any DIAC inquiry other than LIAC.
- the connection button 12 is pressed at the terminal M 1 (corresponding to the terminal 10 a shown in FIG. 4)
- a limited inquiry message is issued. Is sent only over short distances.
- the standby button 13 is pressed on the terminal M 2 (corresponding to the terminal 10 b shown in FIG. 4)
- the limited inquiry message is received only for a certain period of time, and the terminal waits in a responsive state. .
- the device that can respond to the limited inquiry message of the terminal M1 The only device that is within a range of about 15 cm and is waiting to be able to respond to the limited inquiry message, that is, the terminal M2.
- the terminal M3 that has responded to the inquiry message from the terminal M1 may receive the inquiry message because the distance is long. Can not. Terminal M5 was able to receive the inquiry message because of the short distance, but could not respond because it was not configured to respond to the limited inquiry message.
- the terminal Ml the user can specify the terminal M2, which is a device to be uniquely connected, and can select a desired device from a plurality of devices required for communication as shown in FIG. There is no need to make any selections.
- the two terminals are placed very close to each other, and the device to be connected is automatically selected by pressing the connect button and the standby button at the same time. You can do it. Furthermore, since the device to be connected can be specified, it is possible to automatically select and execute an appropriate service according to the status of the terminal after connecting.
- Fig. 7 is a flowchart showing the processing procedure at the terminal that sends the inquiry message (corresponding to terminal M1 in Fig. 6).
- Fig. 8 shows the terminal that responds to the inquiry message.
- 7 is a flowchart showing a processing procedure in (corresponding to terminal M2 in FIG. 6).
- FIG. 9 is a flowchart showing a connection processing procedure on the terminal side that transmitted the inquiry message.
- Step S111 the processing procedure at the terminal transmitting the inquiry message.
- the control unit 13 that detects that the connection button 17a is pressed sets an appropriate transmission power to the wireless communication unit 20 so that the message is transmitted only over a short distance. Send a command to do so.
- the radio communication unit 20 is set to adjust the transmission power in the transceiver unit 27 based on information related to the transmission power stored in advance in the ROM 22 or the flash memory 24. I do. After the setting is completed, a response is sent to the control unit 13 via the input / output interface 25 (step S12).
- the control unit 13 sends a command to the wireless communication unit 20 to transmit a limited inquiry message (step S13).
- the command can specify the maximum number of devices to be discovered by the inquiry message and the period during which the inquiry message continues to be transmitted as parameters. In this example, set the time to collect enough responses from surrounding devices about 10 seconds, and set the maximum number of devices to be discovered to one.
- the radio communication unit 20 generates a limited inquiry message in the baseband control unit 26 in accordance with an instruction issued from the host via the input / output interface 25, and the transceiver unit 2 7, A limited inquiry message is transmitted via antenna 19 (step S14).
- the transmission power is controlled based on the information on the transmission power stored in the ROM 22 or the flash memory 23, and the like.
- the limited inquiry message will be sent only at a short distance.
- the standby button 17b of the terminal is pressed. Then, the waiting process for the limited inquiry message is started (step S21).
- the control unit 13 that has detected that the standby button 17 b has been pressed sends a command to the wireless communication unit 20 so as to respond to the limited inquiry message.
- the wireless communication unit 20 waits for an inquiry message from another device at a certain frequency by a predetermined periodic interpal (step S22).
- Step S23 If an inquiry message from another device is received (Step S23), the wireless communication unit 20 transmits a response message to the inquiry message to the device (Step S23). Four ). At that time, the user may be prompted to push up the standby button 17b by presenting the fact to the user on the display unit 11 of the terminal.
- the control unit 13 instructs the wireless communication unit 20 to interrupt the standby processing, and the wireless communication unit 20 interrupts the standby processing (step S 25), Limited Ends the inquiry message waiting process. Further, if a predetermined time has elapsed, the wireless communication unit 20 suspends the waiting process (step S26), and ends the limited inquiry message waiting process. . If not interrupted in steps S25 and S26, radio communication section 20 changes the standby frequency (step S27), and then repeats the standby processing of the limited inquiry message. As described above, the terminal that operated the standby button 17 b can respond to the limited inquiry message while the standby button is kept pressed and within a predetermined period. It is done as it is.
- the terminal operating the connection button 17a transmits a limited inquiry message over a short distance, and then responds to the limited inquiry message from another device. (Step S15). If the terminal of the other party receives the limited inquiry message at the same timing and at the same frequency in the state of step S23 of the flowchart in FIG. 8, the other party's terminal The wireless communication unit 20 of the terminal transmits a response message to the limited inquiry message via the antenna 19 (step S24), and the wireless communication unit 20 of the terminal that transmitted the inquiry message transmits the response message to the limited inquiry message (step S24). 0 allows the response message to be received via antenna 19.
- the response message received by the terminal contains a unique ID (Bluetooth device address) that can uniquely identify the terminal, obtains this information, and sends the I / O interface 2 to the host. 5 through step 5 (step S16). Also, in this case, since there is only one device that can make an inquiry, the wireless communication unit 20 ends the inquiry process at this point. At that time, the display unit 11 may present a message to the user that the inquiry has been answered, and may prompt the user to press the connection button 17a. If a response message from another device cannot be received, first, if the connection button 17a is pushed up, the control unit 13 instructs the wireless communication section 20 to interrupt the inquiry processing, the wireless communication section 20 interrupts the inquiry processing (step S17), and ends the inquiry message transmission processing. Further, if a predetermined period of time has elapsed, the wireless communication unit 20 suspends the inquiry processing (step S18) and ends the inquiry message transmission processing.
- a unique ID Bluetooth device address
- the radio communication unit 20 changes the frequency at which the message is transmitted (step S19), and continues with the limited inquiry message. Repeat the message transmission process.
- step S16 the control unit 13 stores the terminal-specific ID included in the response message in the RAMI 5, and is subsequently transmitted to the wireless communication unit 20 only in a short distance in step S12.
- a command is sent to the wireless communication unit 20 so that the command to make the setting is returned to normal.
- the radio communication unit 20 returns the subsequent transmission power to the normal state based on the information related to the transmission power stored in the ROM 22 or the flash memories 2 and 4 in advance (that is, the 10 memory). Set so that wireless communication with a transmission distance of 1 Torr is possible.
- a response is sent to the control unit 13 via the input / output interface 25 (step S10).
- connection button 17a and the standby button 17b By performing the above processing on two terminals that are located close to each other, it is possible to uniquely identify the other terminal from one terminal by pressing the connection button 17a and the standby button 17b on both sides .
- one terminal can uniquely identify the other terminal, it is possible to continue connecting the terminal that sent the inquiry message to the terminal that returned the response message, and execute the service It is.
- FIG. 9 is a flowchart of the processing in step S16 of the flowchart of FIG. Next, it is a flowchart showing the processing procedure from connection to service execution.
- the terminal that has transmitted the inquiry message is referred to as terminal 1
- the terminal that has returned the response message is referred to as terminal 2.
- the terminal (terminal 1) that has transmitted the inquiry message is executing an image display program, and the image display program can transmit image data to another device by wireless communication.
- FIG. 11 shows a display example on the screen of the display unit 11 of the terminal 1. The processing shown in the flowcharts of FIG. 7 and FIG. 9 at the terminal 1 performed the display shown in FIG. It is assumed that it is running in the state.
- the terminal 1 stores the unique ID of the terminal 2 to which the terminal 1 is connected in RAM5 in step S16 of the flowchart of FIG.
- the control unit 13 executes a connection process for the wireless communication unit 20 with respect to the device address which is the unique ID of the terminal 2 temporarily stored in the RAM 5 (step S31).
- a connection authentication process for Bluetooth communication may be required depending on the settings of the devices, and this connection authentication is performed by inputting identification information called a passkey.
- the terminal 1 determines whether the desired service is provided by the terminal 2 according to a predetermined protocol.
- service discovery protocol This is done by sending a service inquiry message containing a unique ID (service UUID) indicating a particular service to terminal 2, and terminal 2 sending a response message to that inquiry message.
- service UUID unique ID
- terminal 2 sending a response message to that inquiry message.
- Step S32 the ID of a service that can be used for image transfer is searched.
- terminal 2 is on standby so that it can respond to a specific service.
- a service available for image transfer may be controlled to be in a standby state. May be controlled to be in a standby state.
- the system waits so that the appropriate service according to the currently executing program can be executed. Such control may be performed.
- These pieces of control information are also stored in the ROM 14, the storage unit 16, the storage medium 16a, or the RAM 5 together with an application program such as an image display program.
- Step S34 connection authentication processing for Bluetooth communication may be required depending on the settings of each device. This connection authentication is usually performed by inputting identification information called a passkey and inquiring the user to confirm connection permission. Also, in step S33 of the flowchart in FIG. 9, if it is found that the terminal 2 does not provide the desired service, the connection and the service execution processing are terminated.
- the terminal 1 executes an appropriate service procedure according to the state of the currently executing program (step S35).
- wireless communication was started while a certain image file was being displayed. It is sent to terminal 2.
- a message as shown at the bottom of the screen in Fig. 11 (for example, "# Bluetooth transmission possible") is displayed. By doing so, it may be presented to the user in an easy-to-understand manner.
- These control information are also stored and stored in the ROM 14, the storage unit 16, the storage medium 16a, or the RAM 15 together with an application program such as an image display program.
- the service that is, when the transmission of the image data is started, on the screen composed of the display unit 11 of the terminal 1, for example, as shown in FIG. Then, the fact that the image data has been transferred to the terminal 2 is presented to the user at any time. Also, on the screen configured by the display unit 11 of the terminal 2, as shown in FIG. 13, for example, the fact that the image data has been received from the terminal 1 is presented to the user at any time. In addition, on the screen configured by the display unit 11 of the terminal 2, the received image data may be displayed immediately.
- Step S36 After executing the desired service (step S36), if the service does not need to maintain wireless communication thereafter, the control unit 13 disconnects the communication to the wireless communication unit 20. (Step S37).
- the service In the case of a service that requires wireless communication to be maintained, the service will be continued as it is.
- a communication path such as dial-up communication or IP network communication is provided.
- a service The control information is also stored in the ROM 14, the storage unit 16, the storage medium 16a, or the RAM 15 together with an application program such as an image display program.
- connection button 17a and standby button 17b By pressing the connection button 17a and standby button 17b on both sides, limited inquiries and responses are made over a short distance, and one terminal can uniquely identify only the other terminal.
- a wireless communication connection is automatically established and a desired service is executed. Can be. For example, if the desired service is image transfer, the image is transferred from one terminal to the other terminal, and after the transfer is completed, disconnection processing is performed from one terminal to the other terminal. You may.
- FIG. 10 shows an example of the transmission state from the start of wireless communication using the connection button and the standby button on two terminals Ml and M2 located close to each other until the communication is disconnected.
- FIG. 1OA when the connection button 17a of the terminal Ml is pressed, a limited inquiry message a is transmitted at a short distance (short distance). Then, as shown in FIG. 10B, when the standby button 17 b of the terminal M 2 is pressed, the standby for receiving the limited inquiry message is performed, and the transmission of the response message b is performed. It is done.
- the user operating each terminal performs an operation to stop pressing the connection button 17a on the terminal Ml and an operation to stop pressing the standby button 17 on the terminal M2.
- the connection of the session Move on to the connection of the session.
- the transmission c from the terminal Ml and the transmission d from the terminal M2 are alternately performed, and the ID of the partner terminal is confirmed and a service inquiry is performed to complete the connection.
- the image data transmission e from the terminal Ml is performed, and the terminal M2 performs the reception processing of the wirelessly transmitted image data. If reception is successful, an acknowledgment packet is returned f. After that, transmission of image data ends Then, the processing moves to the disconnection processing of the connected connection, and transmission of a disconnection request from the terminal Ml and transmission of a response from the terminal m2 to the disconnection request include h and transmission of the two units.
- the terminal Ml, M2 is disconnected from the wireless connection, and the wireless communication process ends.
- connection button 17a and the standby button 17b are used to instruct connection on one terminal and standby on the other terminal, respectively.
- the user may touch a button displayed on the screen of the display unit 11 provided therewith. The same operation may be performed by operating other operation means.
- connection button 17a and the standby button 17b is, for example, control such that the inquiry message is transmitted only while the button 17a is being pressed for the connection button 17a. For example, if the connection button 17a is pressed and released immediately, an inquiry message may be sent only for a certain period of time, or an inquiry message may be sent only while the connection button 17a is pressed.
- the connection and the service execution may be sequentially processed, that is, the wireless communication may be stopped as soon as the connection button 17a is released.
- the standby button 17 was controlled so that it responded to the inquiry message only while pressing and holding down the button.For example, if the standby button 17b was pressed and released immediately, the inquiry message was only sent for a certain period of time. You may respond to the message, or process the inquiry response and the service standby only while the standby button 17b is pressed, that is, immediately release the standby button 17b, and immediately release the bluetooth. Communication may be stopped.
- connection button 17a and a standby button 17b are prepared, and the terminal on which the inquiry is made operates the connection button and waits.
- the standby button was operated on the terminal.However, the connection button and the standby button were shared by one button, so that common operations could be performed between the inquiring terminal and the standby terminal. Is also good.
- connection button 17 c for example, as a portable information terminal 10 ′, for communication over a short distance, only the connection button 17 c is provided, and the side on which the inquiry is performed is provided. For both the terminal and the terminal on the standby side, it is sufficient to simply press this connection button 17c.
- connection button 17c When the connection button 17c is pressed, each terminal alternately transmits a limited inquiry message limited to a short distance and waits for the inquiry message. By setting the period for sending the inquiry message and the period for waiting for the inquiry message at random, a certain amount of processing is performed, so that the message is transmitted from one terminal. The inquiry message received is received by the other terminal, and the connection process can be started.
- FIG. 15 is a diagram showing a transmission example in this case.
- each of the two terminals Ml and M2 is configured as a portable information terminal 10 'having only a connection button 17c for short-distance communication, and the connection button 17c is provided as a portable information terminal. It is assumed that they are pressed almost simultaneously. By this pressing, transmission and waiting of the inquiry message are set alternately at random intervals at the terminals Ml and M2.
- the inquiry message i transmitted from the terminal M1 is received by the terminal M2, and the response message j is returned to the terminal Ml. Is done.
- connection button provided on each terminal, limited connection processing is performed over a short distance, so that any user who operates each terminal Ml, M2 can Even when operating the terminal, the same button operation is sufficient, and the operation becomes simpler.
- Figure 16 shows a configuration example in that case.
- the mobile phone terminal 301 is provided with a group of buttons 302 capable of inputting numbers, and is configured to execute a restricted inquiry message corresponding to the number input, or a standby for the message.
- the computer device 303 is provided with a group of numeric keys 304 capable of inputting numbers as part of the keyboard, and a limited inquiry message corresponding to the number input and a waiting message therefor. Is performed.
- Fig. 17 is a time chart showing the connection procedure when these mobile phone terminals and personal computer devices are used.
- the terminal Ml is the mobile phone terminal 301
- the terminal M2 is the personal computer device 303
- the terminal M3 is another computer device not shown.
- the terminals Ml, M2, and M3 are configured to repeat the inquiry waiting at random intervals in accordance with the sequence described in the above-described embodiment.
- the terminal Ml executes the procedure of inputting a specific key 1 with the button group 302, that is, the restricted inquiry and standby procedure corresponding to the key 1 (FIG. 17A).
- terminal M 2 enter key 1 in the same way and perform the same procedure. 17 B).
- terminal M3 executes a restricted inquiry corresponding to key 2 and a waiting sequence (FIG. 17C).
- terminal M1 and terminal M2 perform the same restricted inquiry, so that terminal Ml and terminal M2 are connected and service execution is performed in the same manner as described in the previous embodiment. It is possible to do so.
- terminal M3 performs a restricted inquiry with a different number, so that connection with terminal Ml and terminal M2 is not made.
- the processing for restricting the wireless communication to a short distance such as 15 cm is realized by restricting the transmission output on the transmitting side.
- the processing may be restricted to short-range wireless communication.
- the receiving sensitivity of the portable information terminal on the receiving side may be reduced during standby to limit the wireless communication to short-range wireless communication.
- both the transmission output restriction on the transmission side and the change of the reception sensitivity on the reception side may be executed.
- the configuration described so far is an example in which the present invention is applied to a communication device configured as a portable information terminal.
- the configuration can be applied to a communication device having another configuration.
- mobile phones, digital cameras, digital video cameras, television receivers, portable music players, headphones, etc. have built-in (or external) short-range wireless communication units such as Bluetooth communication. May be performed.
- the wireless communication method is an example in which the Bluetooth method is applied, but other wireless communication methods may be applied.
- the communication device such as a portable information terminal is an example configured as a dedicated communication device.
- a data processing device such as a personal computer device may be used for data communication.
- a program that executes the processing described in the above-described flowchart is installed in a computer device by mounting a card or the like in which the above-described circuit is incorporated, and a system that performs the same processing is configured. May be.
- the communication partner can be specified by bringing the devices to be connected closer to each other and pressing a connection button on both sides, so that communication between the specific devices can be easily and reliably performed. Can be established.
- the communication partner can be specified reliably, it is possible to immediately execute a predetermined process according to the state of the program executed on one device. For example, when an image is displayed on one device, pressing the button automatically transmits the image to a nearby device and a device whose button is also pressed. It is possible to do. This allows the user to easily execute specific applications and services.
- the device you want to connect to is personal. For example, if you want to connect your own mobile phone to a personal computer device to perform dial-up communication, the user holds the mobile phone with his right hand, approaches it to a personal computer, and presses the mobile phone button with his right hand and the personal computer button with his left hand. By pressing almost simultaneously, Communication between the mobile phone and the personal computer can be started reliably, and operability can be significantly improved.
Abstract
Description
Claims
Priority Applications (5)
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US10/516,974 US7076210B2 (en) | 2002-06-07 | 2003-06-05 | Communication method, communication system, and communication device |
EP03733294A EP1513262B1 (en) | 2002-06-07 | 2003-06-05 | Communication method, communication system, and communication device |
KR1020047019805A KR100982085B1 (ko) | 2002-06-07 | 2003-06-05 | 통신 방법, 통신 시스템 및 통신 기기 |
DE60320785T DE60320785D1 (de) | 2002-06-07 | 2003-06-05 | Kommunikationsverfahren, kommunikationssystem und kommunikationseinrichtung |
AU2003242147A AU2003242147A1 (en) | 2002-06-07 | 2003-06-05 | Communication method, communication system, and communication device |
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JP2002167746A JP3928489B2 (ja) | 2002-06-07 | 2002-06-07 | 通信方法、通信システム及び通信機器 |
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2002
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-
2003
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- 2003-06-05 EP EP03733294A patent/EP1513262B1/en not_active Expired - Fee Related
- 2003-06-05 DE DE60320785T patent/DE60320785D1/de not_active Expired - Lifetime
- 2003-06-05 WO PCT/JP2003/007135 patent/WO2003105361A1/ja active IP Right Grant
- 2003-06-05 AU AU2003242147A patent/AU2003242147A1/en not_active Abandoned
- 2003-06-05 KR KR1020047019805A patent/KR100982085B1/ko not_active IP Right Cessation
- 2003-06-05 US US10/516,974 patent/US7076210B2/en not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2001144781A (ja) * | 1999-11-18 | 2001-05-25 | Toshiba Corp | 通信システム、通信装置、及び通信方法 |
JP2003218785A (ja) * | 2002-01-22 | 2003-07-31 | Sony Corp | 無線通信装置、通信相手探索方法、および通信相手探索プログラム |
JP2003218733A (ja) * | 2002-01-28 | 2003-07-31 | Alps Electric Co Ltd | 短距離無線伝送装置 |
Non-Patent Citations (1)
Title |
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See also references of EP1513262A4 * |
Also Published As
Publication number | Publication date |
---|---|
KR100982085B1 (ko) | 2010-09-13 |
KR20050004912A (ko) | 2005-01-12 |
EP1513262B1 (en) | 2008-05-07 |
EP1513262A4 (en) | 2006-05-17 |
JP3928489B2 (ja) | 2007-06-13 |
CN1669231A (zh) | 2005-09-14 |
AU2003242147A1 (en) | 2003-12-22 |
CN100483957C (zh) | 2009-04-29 |
JP2004015558A (ja) | 2004-01-15 |
DE60320785D1 (de) | 2008-06-19 |
WO2003105361B1 (en) | 2004-05-13 |
EP1513262A1 (en) | 2005-03-09 |
US7076210B2 (en) | 2006-07-11 |
US20050202782A1 (en) | 2005-09-15 |
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