JPH11331018A - System and equipment for radio communication - Google Patents

Abstract

PROBLEM TO BE SOLVED: To exchange data in real-time while effectively utilizing an idle channel by searching a usable channel from a call originating station, transmitting an information signal continuously to a connection signal containing the ID number of a station to be called, and receiving the following information signal at the station to be called only when the ID number of its own station is recognized. SOLUTION: When a transmission request is generated, a call originating station 101a searches the idle channel while scanning respective channels. When the idle channel is detected, the connection signal containing the ID number designating a station 101b to be called is continuously transmitted longer than a time required for the station 101b to be called to investigate the presence/ absence of its own ID number and afterwards, the information signal to the side of the station to be called is transmitted continuously to this connection signal. The station 101b to be called receives the connection signal from the call originating station 101a by successively scanning plural radio channels and only when the ID number of its own station is discovered in this connection signal, the information signal followed by this connection signal is received.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication system and apparatus for wirelessly communicating control information of equipment such as an air conditioner and lighting, and detection information of a human detection sensor and the like.

[0002]

2. Description of the Related Art In radio communication, when transmission is performed using a certain channel except for a special one such as a weak radio,
It is necessary to start the transmission operation after checking the presence or absence of the carrier of the channel and confirming that it is not used by another wireless station.

For example, in a fixed channel system in which communication is performed using only one predetermined channel, even if a transmission request is generated at the calling station, if the channel is already used by another system, In some cases, transmission waits even though there are other available channels. Therefore, the following is known as a method for performing communication using an available channel efficiently.

FIG. 7 is a diagram illustrating a communication operation of a conventional system described in Japanese Patent Application Laid-Open No. 9-224279.

When a transmission request occurs, the lower frequency (1
(The second frequency) to select one radio frequency by switching the frequency in order and search for an empty channel. Then, if the selected radio frequency is determined to be an available free channel, a connection request signal is transmitted at that frequency. The transmission of the connection request signal is continuously performed at least for a time during which a signal search for the connection request signal can be performed by switching frequencies for at least all radio frequencies available to the called station.

On the other hand, the called station selects one radio frequency by switching the frequency in ascending order of frequency, regardless of the search for a free channel on the calling station side. Subsequently, based on the radio signal level (carrier level) based on the radio frequency, a search is made for a connection request signal based on the radio frequency selected by the calling station. When the connection request signal is detected and received, a connection response signal is sent to the calling station.
When the calling station receives a connection response signal to the connection request signal, data transmission and reception are alternately performed between the calling station and the called station.

[0007]

However, in the above conventional method, after the calling station transmits a connection request signal, data transmission is started after a procedure of confirming reception of a connection response signal from the called station. Therefore, there is a problem that it is disadvantageous when data transmission after a transmission request is generated requires real-time processing.

Further, when the operation shifts from the transmission operation to the reception operation, that is, a time period during which there is no carrier between the end of the connection request signal and the start of the connection response signal and between the end of the connection response signal and the start of data transmission. Can be. Therefore, if another system uses the same channel and starts transmission at that timing first, there is also a problem that the connection operation itself is wasted.

The present invention solves such a conventional problem, and uses a device control command and sensor information from a calling station to efficiently use an available channel to a called pole in a high real-time manner. It is intended for transmission.

[0010]

According to a first aspect of the present invention, there is provided a wireless communication system, wherein one calling station is connected to one calling station using one wireless channel available from a plurality of wireless channels. In a wireless communication system for exchanging device information wirelessly with a called station, the calling station sequentially scans the plurality of wireless channels when an information transmission request is issued, and uses available channels. Search for a connection signal including an ID number specifying the called station, and scanning of all the channels that may be transmitted. After transmitting continuously for longer than the time, an information signal to the called station side is transmitted following this connection signal, and the called station sequentially scans the plurality of radio channels to establish a connection from the calling station. Receive the signal and this connection Only when recognizing the ID number of its own station in the item, and wherein the receiving information signal that follows the connection signal.

According to a second aspect of the present invention, there is provided a wireless communication system for wirelessly exchanging device information between one calling station and a plurality of called stations using one wireless channel available from the plurality of wireless channels. In the wireless communication system performing the above, the calling station searches for available channels by sequentially scanning the plurality of wireless channels when an information transmission request is generated, and all of the called stations are at least members. A connection signal including a group ID number designating a group to be transmitted is scanned by all the channels that may be transmitted, and the time required for each called station to check for the presence or absence of its own group ID number is determined by the time required for each called station. After a long continuous transmission, an information signal for the called station is transmitted following the connection signal, and the called station sequentially scans the plurality of radio channels to establish a connection from the calling station. Receiving the item, only when recognizing the group ID number of its own station in the connection signal, and wherein the receiving information signal that follows the connection signal.

According to a third aspect of the present invention, there is provided a radio communication apparatus for transmitting device information between one calling station and one called station wirelessly using one radio channel available from a plurality of radio channels. In the wireless communication device that performs exchange, the calling station includes a channel setting unit configured to set one channel from the plurality of wireless channels, and a wireless transmission / reception unit configured to receive or transmit on a channel set by the channel setting unit. An empty channel searching means for sequentially requesting the channel setting means to change channels until a usable channel is found by checking the presence or absence of a carrier of the channel set by the channel setting means, and an ID number designating the called station Necessary for the called station to scan all channels that may be transmitted and to check for the presence of its own ID number. A connection signal that lasts longer than a period, and transmission control means for instructing the wireless transmission / reception means to transmit an information signal to the called station side, wherein the called station changes one channel from the plurality of wireless channels. Channel setting means for setting, radio transmitting and receiving means for transmitting and receiving on the channel set by the channel setting means, and used channel search means for requesting the channel setting means to sequentially change the channel until a channel with a carrier is found,
If the own station ID number cannot be detected by checking the received data of the channel searched by the used channel searching means, a request is made to the channel setting means to change to the next channel, and the own station ID number is detected. ID recognition means for continuing reception of the information signal following the connection signal only when the connection signal is received.

According to a fourth aspect of the present invention, there is provided a wireless communication apparatus for exchanging device information wirelessly between one calling station and a plurality of called stations using one wireless channel available from the plurality of wireless channels. In the wireless communication device that performs, the calling station, a channel setting means for setting one channel from the plurality of wireless channels, a wireless transmitting and receiving means for receiving or transmitting on the channel set by the channel setting means, Unused channel searching means for requesting the channel setting means to sequentially change the channel until finding an available channel by checking the presence or absence of the carrier of the channel set by the channel setting means, and all of the called stations are at least members. Group I to specify the group to be
A connection signal, including a D number, which scans all channels that may be transmitted and lasts longer than the time required for each called station to check for its own group ID number; Transmission control means for instructing the radio transmission / reception means to transmit an information signal to a station side, wherein each of the called stations sets one channel from the plurality of radio channels, and the channel setting means Wireless transmitting / receiving means for performing transmission / reception on the channel set by the means; used channel searching means for requesting the channel setting means to sequentially change channels until a channel with a carrier is found; If the ID number of the group to which the own station belongs cannot be detected by checking the received data, the next channel is set to the channel setting means. Request a change to panel, characterized by comprising an ID recognition means to continue reception of the information signal following the connection signal only when it detects the ID number of the group to which itself belongs.

According to a fifth aspect of the present invention, there is provided a wireless communication system according to the first aspect.
Or the wireless communication system according to 2, wherein the called station specified by the ID number included in the connection signal transmits a reception confirmation signal to the calling station after normally completing the reception of the information signal. And

According to a sixth aspect of the present invention, there is provided a wireless communication apparatus.
In the wireless communication system according to 4, the called station specified by the ID number included in the connection signal transmits a reception confirmation signal to the calling station when the reception of the information signal is normally completed. It is characterized by having.

According to a seventh aspect of the present invention, there is provided a wireless communication system or apparatus according to the third or fourth aspect, wherein the plurality of called stations specified by the ID number included in the connection signal are transmitted to the information signal. The reception acknowledgment signal is sequentially transmitted to the calling station in accordance with the included information on the transmission order.

According to the above means, the called station can recognize the transmission addressed to the own station regardless of which channel is transmitted by using the connection signal, and can continuously receive the control signal as it is.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A radio communication system according to a first embodiment of the present invention uses one radio channel available from a plurality of radio channels and one calling station and one called station. In a wireless communication system for exchanging device information wirelessly with a calling station, a calling station searches for an available channel, transmits an information signal following a connection signal including the ID number of the called station, and The calling station sequentially scans the radio channel to receive the connection signal from the calling station, and receives the subsequent information signal only when the own station ID number is recognized in the connection signal. is there.

According to this method, the called station establishes a connection by matching the channels regardless of which channel is transmitted from a plurality of available channels, and receives the information signal transmitted continuously as it is. can do.

The wireless communication system according to the second embodiment of the present invention uses one wireless channel available from a plurality of wireless channels to wirelessly communicate between one calling station and a plurality of called stations. In the wireless communication system for exchanging device information by the calling station, the calling station searches for an available channel, transmits an information signal following a connection signal including the group ID number of the called station, The wireless channel is sequentially scanned, a connection signal from the calling station is received, and only when the group ID number of the own station is recognized in the connection signal, an information signal subsequent thereto is received.

According to this method, no matter which one of a plurality of available channels is used for transmission, all the called stations specified by the group establish a connection by matching the channels and continue to connect. The transmitted information signal can be received.

A wireless communication apparatus according to a third embodiment of the present invention uses one wireless channel available from a plurality of wireless channels to establish a connection between one calling station and one called station. In a wireless communication device for exchanging device information wirelessly, a calling station has means for searching for an available channel and transmitting an information signal following a connection signal including an ID number of the called station, The calling station sequentially scans the radio channel to receive the connection signal from the calling station, and, if the identification number of the own station is recognized in the connection signal, provides a means for receiving the subsequent information signal. Have

According to this configuration, the called station establishes a connection by matching the channels and receives information signals transmitted continuously as they are transmitted on any of a plurality of available channels. can do.

The wireless communication system according to the fourth embodiment of the present invention uses a single wireless channel available from a plurality of wireless channels to establish a connection between one calling station and one called station. In a wireless communication device for wirelessly exchanging device information, the calling station searches for an available channel, and has means for transmitting an information signal following a connection signal including a group ID number of the called station, The called station sequentially scans the radio channel to receive the connection signal from the calling station, and receives the subsequent information signal only when the group ID number of the own station is recognized in the connection signal. Means.

According to this configuration, no matter which one of a plurality of available channels is used for transmission, all the called stations designated by the group establish a connection by matching the channels, and continue to connect as they are. The transmitted information signal can be received.

The invention described in claim 5 is the first or second invention.
In the wireless communication system described above, the called station specified by the ID number included in the connection signal transmits a reception acknowledgment signal to the calling station after normally completing the reception of the information signal.

According to this configuration, the calling station can perform communication while confirming whether the information has been correctly received by the called station.

The invention described in claim 6 is the invention according to claim 3 or 4
Wireless communication apparatus comprising transmission control means for transmitting a reception acknowledgment signal to a calling station when a called station specified by an ID number included in a connection signal normally ends reception of a control signal. It is.

According to this configuration, the calling station can perform communication while confirming whether the information has been correctly received by the called station.

The invention according to claim 7 is the invention according to claim 5 or 6
In the wireless communication system or apparatus, the plurality of called stations specified by the ID number included in the connection signal sequentially transmit the reception confirmation signal to the calling station according to the information on the transmission order included in the information signal. Things.

According to this configuration, transmissions from a plurality of called stations do not collide, and communication can be performed between the calling station and each called station while confirming the reception confirmation signal.

[0032]

FIG. 1 is an example of a block diagram of a wireless communication apparatus according to the present invention. The following embodiment will be described with reference to this figure.

The radio communication device is roughly divided into a radio unit 10
2a and a control unit 103a. Transmission means 105
“a” is a channel set by the control unit, and transmits a radio wave modulated by input data from an antenna. The receiving means 106a outputs the presence or absence of a carrier of the received radio wave of the channel set by the control unit and demodulated data to the control unit. The switching unit 104a selects a receiving operation and a transmitting operation of the wireless unit.

The channel setting means 108a selects one channel from a plurality of predetermined channels and sets the transmitting means 105a and 106a to the selected channel.
Each time a channel change request is input, one channel is shifted in a certain order.

When an outgoing call request is generated, the vacant channel searching means 109a outputs a channel change request to the channel setting means until the receiving means finds a channel on which no carrier is detected. On the other hand, in the reception waiting state, the used channel searching means 110a outputs a channel change request until a channel on which a carrier is detected is found.

The ID setting means 113a sets the identification number (ID number) of the own station and the group to which the own station belongs, and the ID number of the communication partner station or the group to which the station belongs.

When a channel with a carrier is found by the used channel searching means at the time of reception, the ID identifying means 111a determines whether or not the received data contains the ID number of the own station or the group to which the own station belongs by the ID setting means. Find out. If the ID number cannot be recognized within a certain time,
A channel change request is output to the channel setting means. If it is recognized, the received data is taken into the data input / output means 112a.

When data is input from the control command device 114a to the data input / output unit 112a and a call request is generated, the transmission control unit 107a transmits the input data to the I / O unit 112a.
A transmission frame is formed from the ID numbers of the own station and the other station specified by the D setting unit, and is output to the transmission unit 105a after confirming that an empty channel has been searched.

In FIG. 1, the radio communication devices 101a, 101
b has the same configuration, so that calls can be made from either side. Hereinafter, a case where remote control of an air conditioner or the like is performed will be described as an example, and for convenience of explanation, 101a will be described as a calling station and 101b as a called station. That is, a control command device 114a such as a remote controller is provided for the calling station, and a controlled device 114b is provided for the called station.
Is connected. When used for transmitting sensor information such as human detection information, a sensor is connected to the calling station, and a device for collecting data is connected to the called station.

(Embodiment 1) FIG. 2 shows a transmission frame from a calling station in this embodiment. The transmission frame includes a call name 201, a connection signal 202, and a control signal 203.

The connection signal is configured by repeating a connection block 204 including a bit synchronization signal 207, a frame synchronization signal 208, and a called station ID 209 a fixed number of times (n times in the figure). The bit synchronization signal is a bit string in which “0” and “1” are alternately arranged a certain number of times, and is a signal used for generating a bit read timing on the receiving side. The frame synchronization signal is a fixed bit string determined in advance by the same system, and is a signal for giving the reception position of the head for reading data to the receiving side. This frame synchronization signal is followed by a called station ID uniquely assigned to each wireless device.

The control signal is composed of a calling station ID 212, a called station ID 213, control data 214, and an error control code 215 for performing error detection or error correction, after the bit synchronization signal 210 and the frame synchronization signal 211. .
However, the frame synchronization signal of the control signal is a bit string different from the frame synchronization signal of the connection signal so that the connection signal and the control signal can be distinguished.

The operation in which the control signal is received by the called station will be described with reference to FIG. In this figure, the horizontal axis represents time, and the vertical axis represents transmission or reception channels. In this embodiment, A
The communication is performed by selecting an empty channel from the five channels of E to E.

When a transmission request is generated, the calling station first switches to the receiving operation and searches for an empty channel while scanning from the A channel to the E channel in order. If there is no vacancy up to the E channel, the operation returns to the A channel again. When a vacant channel (A channel in this embodiment) is detected, it switches to transmission and transmits the frame of FIG. However, the number of repetitions of the connection block by the connection signal is such that the total duration (Tc) is longer than the time (Ts) required for the called station to scan all five channels (Tc> Tc).
s)

In the called station, the receiving operation changes from channel A to channel E.
The channel is sequentially and repeatedly scanned to search for a used channel with a carrier. When the used channel is found, the called station ID included in the connection signal is searched. If the ID of the own station is not found within the time required for transmission of two connection blocks after carrier detection, the next used channel is searched (301 to 306). When the own station ID is found (307), the receiving operation is continued as it is (3).
08) Waiting for the appearance of a frame synchronization signal of a control signal different from the connection signal, and reading the subsequent data (3)
09), reception is completed.

As described above, by transmitting the control signal continuously with the connection signal including the ID number designating the called station,
The called station can receive the control signal irrespective of which of a plurality of available channels is transmitted, and can exchange data in a high real-time manner because it does not perform a connection establishment confirmation operation. In addition, since there is no time to interrupt the carrier from the start of transmission to the completion of transmission of control data, the channel is occupied by another wireless station from the middle, the risk of connection failure is low, and the reliability is high. .

In the present embodiment, in order to recognize the start of the control signal, the frame synchronization signal is set to a different bit string between the connection signal and the control signal. However, the present invention is not limited to this. Another recognition signal may be inserted in between. Further, information indicating the end timing of the connection signal, for example, the number of remaining connection blocks or the like may be added to each connection block forming the connection signal.

(Embodiment 2) In this embodiment, a case where a control signal is transmitted to a plurality of called stations will be described. FIG. 4 shows a configuration of a transmission frame from the calling station. The transmission frame is called name 401, connection signal 402, control signal 40
3 and the basic operation is almost the same as that of the first embodiment, and only different points will be described.

In the connection signal, a group ID 409 for designating a group including a called station to be transmitted is used instead of a called station ID for designating one called station.

Following the calling station ID 412, the control signal includes a plurality of called station IDs 41 included in the designated group.
3a, 413b and 413c are arranged. In this embodiment, the control data is transmitted to a, b, and c three called stations.

FIG. 5 is an explanatory diagram of the operation. Also in the present embodiment, communication is performed by selecting an empty channel from the five channels A to E. However, in the figure, the B, C, and D channels are omitted due to space limitations. The four wireless stations a to d included in the group specified by the connection signal from the calling station receive the connection signals (507a to 507d) and start reading control signals. However, since the station d cannot detect the own station ID in the list of the called station IDs in the control signal, the station d stops the receiving operation at that time (509d).

According to the above-described embodiment, a plurality of called stations can receive a control signal regardless of which channel of A to E is transmitted, and the connection establishment confirmation operation is not performed. Can exchange data. Also,
Since there is no time to interrupt the carrier from the start of transmission to the completion of transmission of control data, the channel is occupied by other wireless stations halfway, and the risk of connection failure is low,
Reliability also increases.

In the present embodiment, each of the called stations receives the common control data (414) in the frame configuration diagram of FIG. 4, but the present invention is not limited to this. It is also possible to make control data correspond.

(Embodiment 3) In this embodiment, a transmission frame from a calling station is configured as shown in FIG. 2, and the operation will be described with reference to FIG. The process is the same as that of the first embodiment until the called station receives 609 the control signal 611 from the calling station.

When the called station reads all the received data,
Using the error control code 215, it is checked whether there is an error in the received data from the calling station ID 212 to the control data 214. A cyclic code is used as the error control code. After the error determination, the mobile station switches from reception to transmission while setting the same channel, and transmits an acknowledgment (ACK) to the calling station if there is no error, and transmits a negative acknowledgment (NAK) to the calling station if there is an error.

As soon as the transmission is completed, the called station switches from transmission to reception while setting the same channel, and waits for a reception confirmation signal from the called station. If the ACK is received within the fixed time, the communication is terminated. When the NAK is received, it is determined that the connection has been correctly performed but the transmission data has an error, and only the control data is transmitted again. If neither ACK nor NAK can be received within a certain period of time, it is determined that the connection has not been made correctly, and again, FIG.
Send normal transmission frames.

FIG. 5 is an explanatory diagram of an example of the operation. The operation is the same as that of the first embodiment until the called station receives the control signal 609. If an error is detected, NAK is transmitted as reception confirmation signal 612. The calling station receives the received signal 615
Then, only the control signal 616 is transmitted again on the same channel. If there is no error in the received signal 613, an ACK 614 is sent, and the calling station confirms this and completes the communication.

According to the above embodiment, the calling station performs communication while confirming whether the control data has been correctly received by the called station, so that the communication reliability is improved.

In the present embodiment, the called station sends only ACK and NAK as the acknowledgment signal. However, the present invention is not limited to this. For example, when there is data to be sent to the calling station. May also be sent with this. If the control data from the calling station is not large enough to fit in one frame, it can be divided into a plurality of blocks and transmitted sequentially while checking ACK.

(Embodiment 4) In this embodiment, a transmission frame from a calling station is configured as shown in FIG. 4, and the operation will be described with reference to FIG. Each of the called stations a, b, and c receives the control signal 511 from the calling station (509a, 509b, 509).
Until c), the operation is the same as in the second embodiment.

When each of the called stations reads all the received data, the called station checks using the error control code 415 whether there is any error in the received data from the calling station ID 412 to the control data 414. After error determination, switch from reception to transmission with the same channel set, and if there is no error, an acknowledgment (ACK); if there is an error, negative acknowledgment (NAK)
To the calling station. The transmission of the acknowledgment signal is performed in ascending order of the values of the plurality of called station IDs specified by the control signal (512a, 512b, 512c).

According to the above embodiment, even when communication is performed between the calling station and the plurality of called stations while confirming the acknowledgment signal, transmission from each called station does not collide. Highly reliable communication can be performed.

In each of the above embodiments, the transmission order of the acknowledgment signal is determined using the value of the called station ID. However, the present invention is not limited to this. The called station ID in the frame configuration of FIG. It is also possible to determine by another method such as the order in which the images are arranged.

[0064]

As is clear from the above embodiments, the inventions according to claims 1 and 3 use one radio channel available from a plurality of radio channels and one calling station and one called station. In a wireless communication system for exchanging device information wirelessly with a calling station, a calling station searches for an available channel and transmits an information signal following a connection signal including the ID number of the called station. The called station sequentially scans the radio channel to receive the connection signal from the calling station, and receives the subsequent information signal only when the ID number of the own station is recognized in the connection signal. Things.

As a result, the called station can receive the control signal no matter which of the plurality of channels available for the calling station to transmit, so that the available channel can be used effectively.

Further, since the control signal is transmitted continuously with the channel connection signal, data can be exchanged with a high real-time property. In addition, since there is no time to interrupt the carrier from the start of transmission to the completion of transmission of control data, communication reliability is improved.

According to the second and fourth aspects of the present invention, device information is wirelessly exchanged between one calling station and a plurality of called stations using one radio channel available from a plurality of radio channels. In a wireless communication system that performs a call, the calling station searches for an available channel, transmits an information signal following a connection signal including the group ID number of the called station, and the called station sequentially scans the wireless channels. Then, only when the connection signal from the calling station is received and the group ID number of the own station is recognized in the connection signal, an information signal subsequent thereto is received.

[0068] This allows each called station to receive a control signal regardless of which of a plurality of channels available to the calling station for transmission, so that an available channel can be used effectively. .

Furthermore, since the control signal is transmitted continuously with the channel connection signal, data can be exchanged with a high real-time property. In addition, since there is no time to interrupt the carrier from the start of transmission to the completion of transmission of control data, communication reliability is improved.

The fifth and sixth aspects of the present invention provide the first and second aspects.
In addition to the method or configuration described in 2, 3, or 4, the called station transmits a reception acknowledgment signal to the calling station after normally completing the reception of the information signal.

As a result, the calling station performs communication while confirming that the information signal has been correctly received by the called station, thereby improving communication reliability.

The invention according to claim 7 is directed to claim 5 or 6
In addition to the described method or configuration, the plurality of called stations sequentially transmit the acknowledgment signal to the calling station in accordance with the information on the transmission order included in the information signal.

Thus, even when communication is performed between the calling station and a plurality of called stations while confirming the acknowledgment signal, transmission from each called station does not collide with high reliability. Communication is possible.

[Brief description of the drawings]

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

FIG. 2 is a diagram illustrating a frame configuration of a calling station transmission signal according to an embodiment of the present invention;

FIG. 3 is a diagram illustrating the operation of a calling station and a called station in one embodiment of the present invention.

FIG. 4 is a diagram illustrating a frame configuration of a calling station transmission signal according to an embodiment of the present invention;

FIG. 5 is an explanatory diagram of an operation of a calling station and a plurality of called stations in one embodiment of the present invention.

FIG. 6 is an explanatory diagram of an operation of a calling station and a called station in one embodiment of the present invention.

FIG. 7 is an explanatory diagram of a communication operation of a conventional system.

[Explanation of symbols]

101a, 101b Wireless communication device 102a, 102b Wireless unit 103a, 103b Control unit 104a, 104b Switching unit 105a, 105b Transmission unit 106a, 106b Receiving unit 107a, 107b Transmission control unit 108a, 108b Channel setting unit 109a, 109b Free channel searching unit 110a, 110b Used channel search means 111a, 111b ID identification means 112a, 112b Data input / output means 113a, 113b ID setting means 114a Control command device 114b Controlled equipment 201, 401 Call name 202, 402 Connection signal 203, 403 Information signal 207 , 210, 407, 410 Bit synchronization signal 208, 211, 408, 411 Frame synchronization signal 209, 213, 413a, 413b, 413c Called station ID 4 9 called station group ID 212 and 412 calling station ID 214,414 control data 215,415 error control code

Claims (7)

[Claims] A wireless communication system for exchanging device information wirelessly between one calling station and one called station using one wireless channel available from a plurality of wireless channels, The calling station sequentially scans the plurality of wireless channels for an available channel when an information transmission request occurs, and transmits a connection signal including an ID number designating a called station. After scanning all the possible channels and continuously transmitting the presence or absence of the ID number of the own station for a time longer than the time required for the called station to check, the connection signal is then transmitted to the called station side. Send information signal,
The called station sequentially scans the plurality of radio channels to receive a connection signal from the calling station, and recognizes the ID number of the own station in the connection signal only when the connection signal is recognized. A wireless communication method characterized by receiving a subsequent information signal. 2. A wireless communication system for exchanging device information wirelessly between one calling station and a plurality of called stations using one wireless channel available from a plurality of wireless channels, A calling station sequentially scans the plurality of radio channels for an available channel when an information transmission request is issued, and searches for an available channel, and a group ID number designating a group including at least all the called stations as members. After transmitting the connection signal including continuously for a longer time than required for each of the called stations to scan all possible channels for the presence or absence of the group ID number of the own station, Following this connection signal, transmit an information signal to the called station side, the called station sequentially scans the plurality of radio channels and receives a connection signal from the calling station,
A wireless communication system characterized by receiving an information signal following a connection signal only when the own group ID number is recognized in the connection signal. 3. A wireless communication device for wirelessly exchanging device information between one calling station and one called station using one wireless channel available from a plurality of wireless channels, The calling station is configured by a channel setting unit that sets one channel from the plurality of wireless channels, a radio transmitting and receiving unit that performs reception or transmission on the channel set by the channel setting unit, and is set by the channel setting unit. Empty channel searching means for requesting the channel setting means to sequentially change the channel until finding an available channel by checking the presence or absence of the carrier of the channel,
A connection that includes an ID number specifying the called station and scans all channels that may be transmitted, and lasts longer than the time required for the called station to check for the presence or absence of its own ID number. Signal, transmission control means for instructing the wireless transmission and reception means to transmit an information signal to the called station side, the called station, channel setting means for setting one channel from the plurality of wireless channels, Wireless transmitting / receiving means for transmitting / receiving on the channel set by the channel setting means, used channel searching means for sequentially requesting the channel setting means to change channels until a channel with a carrier is found, and searching by the used channel searching means. If the own station ID number cannot be detected by checking the received data of the set channel, the channel setting means is sent to the next channel. Wireless communication device requests a change, characterized by comprising an ID recognition means to continue reception of the information signal following the connection signal only when it detects the own ID number. 4. A wireless communication device for wirelessly exchanging device information between one calling station and a plurality of called stations using one wireless channel available from a plurality of wireless channels, A calling station, a channel setting unit for setting one channel from the plurality of radio channels, a radio transmitting / receiving unit for receiving or transmitting on the channel set by the channel setting unit, and a call setting unit set by the channel setting unit Unused channel search means for requesting the channel setting means to sequentially change the channel until finding an available channel by checking the presence or absence of the carrier of the channel,
It includes a group ID number designating a group of which at least all of the called stations are members, and scans all the channels that may be transmitted to scan its own group I
A connection signal that lasts longer than the time required for each called station to check for the presence or absence of a D number, and transmission control means for instructing the wireless transmitting / receiving means to transmit an information signal to the called station side, Each of the called stations is a channel setting unit for setting one channel from the plurality of radio channels, a radio transmitting and receiving unit for transmitting and receiving on the channel set by the channel setting unit, and sequentially until a channel with a carrier is found. A use channel searching means for requesting a channel change to the channel setting means; and checking the received data of the channel searched by the use channel searching means to detect the ID number of the group to which the own station belongs. Means to change to the next channel, and only when the ID number of the group to which the station belongs belongs is detected. Radio communication apparatus characterized by comprising an ID recognition means to continue reception of the information signal following the signal. 5. The called station designated by an ID number included in the connection signal, after receiving the information signal normally, transmits a reception acknowledgment signal to the calling station. 3. The wireless communication system according to 1 or 2. 6. A called station designated by an ID number included in a connection signal has transmission control means for transmitting a reception acknowledgment signal to a calling station when reception of an information signal is normally completed. The wireless communication device according to claim 3, wherein: 7. A plurality of called stations specified by an ID number included in a connection signal sequentially transmit reception acknowledgment signals to a calling station in accordance with information on a transmission order included in an information signal. The wireless communication system or device according to claim 5 or 6, wherein