JP2001203742A - Device and method for optical communication - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform optical communication between a master unit and a specified slave unit without using a logical address allocated to the slave unit. SOLUTION: The master unit 401 transmits a line insuring enabling signal in accordance with a line insuring request signal transmitted from the slave unit 402, the slave unit 402 receiving the line insuring enabling signal after transmitting the line insuring request signal performs data communication to the master unit 401, a slave unit 403 receiving the line insuring enabling signal without transmitting a line insuring request signal is made a transmission inhibition state, the master unit 401 transmits a line release signal to all of the slave units 402 and 403 after finishing the data communication, and the slave units 402 and 403 receiving the line release signal are shifted into a communicable state after prescribed time passes.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a plurality of slave units and one
TECHNICAL FIELD The present invention relates to an optical communication device and method for performing optical communication with one base unit.

[0002]

2. Description of the Related Art There is known an optical communication device for transmitting and receiving data between one master unit and a plurality of slave units by optical communication.

Here, in a conventional optical communication apparatus, a specific slave unit and a master unit communicate with each other using a logical address assigned to the slave unit as a destination.

[0004]

However, according to such a conventional technique, when communication is performed between a master unit and a plurality of slave units, different logical addresses are assigned to each slave unit. Need to be assigned.

[0005] In addition, there has been a complication that it is necessary to manage logical addresses when adding or deleting slave units.

Accordingly, an object of the present invention is to provide an optical communication technique capable of performing optical communication between a master unit and a specific slave unit without using a logical address assigned to the slave unit. .

[0007]

In order to solve this problem, an optical communication apparatus according to the present invention is an optical communication apparatus for transmitting and receiving data by optical communication, wherein a line securing request signal transmitted from any of the slave units. Sends a line reservation permission signal according to
While the master unit transmits a line release signal to all slave units after the data communication ends, and performs data communication to the master unit when receiving a line reservation permission signal after transmitting a line reservation request signal When a line reservation permission signal is received and a line reservation permission signal is received, the transmission state is prohibited, and when a line release signal is received from the master unit, the state transits to a communicable state after a lapse of a predetermined time. It is composed of two slave units.

An optical communication apparatus according to the present invention is an optical communication apparatus for transmitting and receiving data by optical communication. The optical communication apparatus receives a line securing request signal transmitted from any of the slave units, and transmits a line securing permission signal. A master unit that transmits a line release signal to all slave units after data communication is completed, and a line reservation request signal is transmitted while the line reservation request signal is received and the line reservation request signal is received. When the secure permission signal is received, data communication is performed with respect to the master unit, and when a line release signal is received from the master unit, a plurality of slave units that transit to a communicable state after a predetermined time elapses. Things.

Further, the optical communication method according to the present invention is an optical communication method for transmitting and receiving data between one master unit and a plurality of slave units by optical communication, wherein a line transmitted from any of the slave units is transmitted. In response to the reservation request signal, the base unit transmits a line reservation permission signal, and after transmitting the line reservation request signal, the slave unit that receives the line reservation permission signal performs data communication with the parent terminal and performs a line reservation request signal. The slave unit that receives the line securing permission signal in a state where it is not transmitting is set to a transmission prohibited state, and after the data communication is completed, the master unit transmits a line release signal to all the slave units and sends a line release signal to all the slave units. All of the slave units that have received the information are changed to a communicable state after a predetermined time has elapsed.

An optical communication method according to the present invention is an optical communication method for transmitting and receiving data by optical communication between one master unit and a plurality of slave units, wherein a line transmitted from one of the slave units is transmitted. The base unit that has received the reservation request signal transmits a line reservation permission signal, and the other handset that has received the line reservation request signal is set to the transmission prohibited state, and the handset that receives the line reservation permission signal is sent to the base unit. After the data communication is completed, the master unit transmits a line release signal to all the slave units after the data communication is completed, and all the slave units that have received the line release signal transit to the communicable state after the lapse of a predetermined time. It is something to do.

[0011] Thus, since only the slave unit that has transmitted the line reservation request signal can perform data communication with the master unit, the master unit can communicate with the specific slave unit without using the logical address assigned to the slave unit. Optical communication can be performed between them.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is an optical communication device for transmitting and receiving data by optical communication, wherein a line securing permission is issued in response to a line securing request signal transmitted from any of the slave units. The master unit sends a signal and sends a line release signal to all slave units after data communication ends, and the master unit sends a line reservation request signal and then receives a line reservation permission signal. If a line reservation request signal is received and a line reservation permission signal is received but a line reservation permission signal is received, transmission is prohibited, and if a line release signal is received from the master unit, communication is possible after a predetermined time has elapsed. This is an optical communication device composed of a plurality of slave units that transition to a state, and only the slave unit that has transmitted the line reservation request signal can perform data communication with the master unit. Address It has the effect that it is possible to perform the optical communication between the master unit and a particular slave unit without using a.

According to a second aspect of the present invention, there is provided an optical communication apparatus for transmitting / receiving data by optical communication, wherein a line securing request signal transmitted from any of the slaves is received and a line securing permission signal is transmitted. The master unit transmits a line release signal to all slave units after the data communication is completed. When a line reservation permission signal is received, data communication is performed with the base unit.
An optical communication device composed of a plurality of slave units that transition to a communicable state after a predetermined time has elapsed if a line release signal is received from the master unit, and only the slave unit that has transmitted the line securing request signal is the master unit. Since it is possible to perform data communication with the base unit, it is possible to perform optical communication between the base unit and a specific base unit without using a logical address assigned to the base unit.

According to a third aspect of the present invention, there is provided an optical communication method for transmitting and receiving data by optical communication between one master unit and a plurality of slave units. The base unit transmits a line securing permission signal in response to the line securing request signal, and the slave unit that receives the line securing permission signal after transmitting the line securing request signal performs data communication with the master unit and secures the line. The slave unit that receives the line securing permission signal while not transmitting the request signal is set to the transmission prohibited state, and after the data communication is completed, the master unit transmits a line release signal to all the slave units and opens the line. This is an optical communication method in which all the slaves that have received the signal transit to a communicable state after a predetermined time has elapsed, and only the slave that has transmitted the line reservation request signal can perform data communication with the master. Use the logical address assigned to It has the effect that it is possible to perform the optical communication between the Rukoto without master unit and a particular handset.

According to a fourth aspect of the present invention, there is provided an optical communication method for transmitting and receiving data between one master unit and a plurality of slave units by optical communication. The master unit that has received the line reservation request signal transmits a line reservation permission signal, and the other slave units that have received the line reservation request signal are placed in the transmission prohibited state. After data communication is completed, the master unit sends a line release signal to all slave units after data communication is completed, and all slave units that have received the line release signal can communicate after a predetermined time Is an optical communication method that transits to
Since only the slave unit that has transmitted the line reservation request signal can perform data communication with the master unit, optical communication is performed between the master unit and a specific slave unit without using a logical address assigned to the slave unit. It has the effect that it becomes possible.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. In these drawings, the same members are denoted by the same reference numerals, and duplicate description is omitted.

FIG. 1 is a block diagram showing a configuration of a master unit of an optical communication apparatus for executing an optical communication method according to an embodiment of the present invention. FIG. 2 shows an optical communication method according to an embodiment of the present invention. FIG. 3 is a block diagram showing a configuration of a slave unit of the optical communication device to be executed;
FIG. 4 is a block diagram showing an optical communication device composed of the master unit of FIG. 1 and the slave unit of FIG. 2. FIG. 4 shows an example of a communication method performed between the master unit of FIG. 1 and the slave unit of FIG. FIG. 5 is an explanatory diagram showing another example of a communication method performed between the parent device of FIG. 1 and the child device of FIG.

As shown in FIGS. 1 and 3, a master unit 301 of the optical communication apparatus according to the present embodiment includes a CPU 101 for controlling the operation of the entire apparatus, and a memory 102 for storing various information related to data transmission and reception. , Infrared light emitting element 1
, An infrared transmitting unit 104 for transmitting data to the slave units 302, 303 and 304, and an infrared light receiving element 1
07, an infrared receiving unit 105 for receiving data from the slaves 302, 303, 304, and an external communication interface 108 for connecting to an external network 308 by wire or wirelessly. Interconnected.

As shown in FIG. 2, the slave units 302, 303 and 304 of the optical communication apparatus according to the present embodiment store various information relating to data transmission and reception with the CPU 201 which controls the operation of the entire apparatus. A memory 202, an infrared transmitting unit 204 including an infrared light emitting element 206 and transmitting data to the parent device 301, and an infrared light receiving element 207.
And an infrared receiving unit 205 for receiving data from the base unit 301 and a device connection interface 208 for connecting to the sensors 305 and 307 and the home appliance 306, which are mutually connected by a bus 203. I have.

In FIG. 3, three slave units 302 and 30 as communication adapters are connected to a master unit 301 as a line concentrator.
Although 3,304 are assigned, any number may be used as long as it is one or more.

Next, the operation of such an optical communication device will be described.

As described above, the master unit 301 is connected to the external network 308 by the external communication interface 108, and the slave unit 30 is connected by the infrared light emitting element 106.
2, 303, 304, and the infrared light receiving element 107 receives data from the slave units 302, 303, 304. The slave units 302, 303, 304 are connected to the sensors 305, 30 by the device connection interface 208.
7 and the home appliance 306, the infrared light emitting element 206 transmits data to the parent device 301, and the infrared light receiving element 207
Receives data from master device 301.

In order to collect and control data from the plurality of sensors 305 and 307 and the home appliance 306 by infrared communication, addresses for the slave units 302, 303 and 304 are not specified in the communication data packet.
Data communication is performed with a 1-bit flag indicating whether the transmission destination is the parent device 301 or the child devices 302, 303, 304 in a communication data packet.

Next, a specific example of a communication method by the optical communication device according to the present embodiment will be described. Here, FIG. 4 shows the first specific example and FIG. 5 shows the second specific example, and these will be described in order.

First, in FIG. 4, one master unit 401
And two slave units 402 in positions where signals do not reach each other,
403 are arranged. The parent device 401 and the child device 40
2, 403 are installed in a space where optical communication can be performed with each other.

When the slave unit 402 transmits and receives data to and from the master unit 401, first, a line securing request signal is sent to the master unit 40.
Send to 1.

In response, master unit 401 transmits a line securing permission signal. At this time, both child units 402 and 403 receive the line securing permission signal transmitted by master unit 401.

Then, the slave unit 402, which has received the line securing permission signal after transmitting the line securing request signal, starts data communication with the master unit 401. Further, the slave unit 403 that has received the line securing permission signal in a state where the line securing request signal has not been transmitted is in a transmission prohibited state.

After data communication with slave unit 402 is completed, master unit 401 transmits a line release signal to slave units 402 and 403.

Then, the slave unit 402, which has received the line release signal after terminating the data communication, waits for a random time and transits to a communication enabled state. Wait and transit to the communication enabled state.

Next, in FIG. 5, one master unit 501 is provided.
Slave units 502 and 50 located at positions where signals can reach each other.
3 are arranged. The parent machine 501 and the child machine 502,
Reference numeral 503 denotes a space in which optical communication can be performed with each other.

When the slave unit 502 transmits / receives data to / from the master unit 501, first, a line reservation request signal is sent to the master unit 50.
Send to 1.

The line reservation request signal transmitted by the child unit 502 is also received by the child unit 503, and upon receiving the line reservation request signal, the child unit 503 is set in the transmission prohibited state.

The base unit 501 that has received the line reservation request signal transmits a line reservation permission signal to the child device 502, and the child device 502 that has received the line reservation permission signal sends the line reservation permission signal to the parent device 50.
1 and data communication is started.

When the data communication is completed, master device 501 transmits a line release signal. Then, the slave units 502 and 503 that have received the line release signal wait for a random time and then transition to a communicable state.

As described above, according to the present embodiment, since only the slave unit that has transmitted the line reservation request signal can perform data communication with the master unit, it is possible to use the slave unit without using the logical address assigned to the slave unit. Optical communication can be performed between the parent device and a specific child device.

[0037]

As described above, according to the present invention, since only the slave unit that has transmitted the line reservation request signal can perform data communication with the master unit, the logical address assigned to the slave unit is used. An effective effect is obtained that optical communication can be performed between the master unit and a specific slave unit.

Thus, there is no need to prepare an address management mechanism for the slave unit on the master unit side or set the address of the own unit on the slave unit side, so that an effective effect that the apparatus configuration is simplified can be obtained. Can be

Further, since there is no limit on the number of slave units that can communicate with the master unit, an effective effect that it is possible to flexibly combine the master unit and the slave unit is obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a master unit of an optical communication device that executes an optical communication method according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a slave unit of the optical communication device that executes the optical communication method according to one embodiment of the present invention;

FIG. 3 is a block diagram showing an optical communication device including the master unit of FIG. 1 and the slave unit of FIG. 2;

FIG. 4 is an explanatory diagram showing an example of a communication method performed between the parent device of FIG. 1 and the child device of FIG. 2;

FIG. 5 is an explanatory diagram showing another example of a communication method performed between the parent device of FIG. 1 and the child device of FIG. 2;

[Explanation of symbols]

 101 CPU 102 Memory 103 Bus 104 Infrared Transmitting Unit 105 Infrared Receiving Unit 106 Infrared Light Emitting Element 107 Infrared Light Receiving Element 108 External Communication Interface 201 CPU 202 Memory 203 Bus 204 Infrared Transmitting Unit 205 Infrared Receiving Unit 206 Infrared Light Emitting Element 207 Infrared Light Receiving Element 208 Equipment Connection interface 301 Main unit 302 Sub unit 303 Sub unit 304 Sub unit 305 Sensor 306 Home appliance 307 Sensor 308 Network 401 Main unit 402 Sub unit 403 Sub unit 501 Main unit 502 Sub unit 503 Sub unit

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiroshi Shiramizu 1006 Odakadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. 72) Inventor Koji Yamaguchi 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Hiroshi Okano 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka Totoki Equipment Co., Ltd. (72) Inventor Kiyoshi Arifuku 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-city, Fukuoka Prefecture Inside Totoki Kiki Co., Ltd. F term (reference) 5K002 AA05 DA91 FA03 GA07 5K033 AA04 AA09 CA19 CB01 CB06 DA01 DA05 DA13 DA14 DA20 DB05

Claims (4)

[Claims] 1. An optical communication device for transmitting and receiving data by optical communication, comprising: transmitting a line securing permission signal in response to a line securing request signal transmitted from any of the slaves; A base unit that transmits a line release signal to the slave unit, and transmits a line reservation request signal while transmitting data to the base unit when receiving a line reservation permission signal after transmitting a line reservation request signal. When a line securing permission signal is received in a state in which communication is not performed, transmission is prohibited, and when a line release signal is received from the master unit, a plurality of slave units that transit to a communicable state after a predetermined time elapses. An optical communication device, comprising: 2. An optical communication device for transmitting and receiving data by optical communication, comprising: receiving a line securing request signal transmitted from any of the slaves, transmitting a line securing permission signal, and setting all signals after the data communication is completed. A master unit that transmits a line release signal to the slave unit, and receives a line reservation request signal by transmitting a line reservation request signal while being in a transmission prohibited state when the line reservation request signal is received. In the case, while performing data communication with the master unit, if a line release signal is received from the master unit, a plurality of slave units that transit to a communicable state after a predetermined time has elapsed. Optical communication device. 3. An optical communication method for transmitting and receiving data between one master unit and a plurality of slave units by optical communication, the method comprising: responding to a line securing request signal transmitted from any one of the slave units. The base unit transmits a line securing permission signal, transmits the line securing request signal, and after receiving the line securing permission signal, the slave unit performs data communication with the master unit and transmits a line securing request signal. The slave unit that has received the line securing permission signal in a state in which the slave unit is not performing transmission is disabled, and after the data communication is completed, the master unit transmits a line release signal to all the slave units, and a line release signal The optical communication method is characterized in that all the slave units that have received the command transit to a communicable state after a lapse of a predetermined time. 4. An optical communication method for transmitting and receiving data between one master unit and a plurality of slave units by optical communication, comprising: receiving a line securing request signal transmitted from any one of the slave units. The master unit transmits a line securing permission signal, and the other slave units that have received the line securing request signal are in a transmission prohibited state, and the slave units that have received the line securing permission signal communicate with the master unit. After the data communication is completed, the master unit transmits a line release signal to all the slave units, and all the slave units that have received the line release signal are in a communicable state after a lapse of a predetermined time. An optical communication method, characterized by: