JP2006121392A - Radio communication device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio communication device capable of reducing a frequency of call collision by radio units in a control station including a radio unit and a slave station to control a controlled apparatus (e.g. an air conditioner body). <P>SOLUTION: When the controlled apparatus generates an event and communication with the control station 300 is carried out, a radio unit 420 performs transmission based upon characteristic information which is stored in a transmission timing storage part 409 and set for each controlled apparatus. A communication slot and a hopping pattern are determined and then the communication is carried out, so even when a plurality of controlled apparatuses in a house generate events for starting communication at the same time, they are different in transmission timing and a call collision is prevented. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a wireless communication apparatus for performing wireless communication.

  In recent years, there is an urgent need to develop and popularize communication infrastructure in the home, and various technologies are being studied both inside and outside the country. Communication infrastructure in the home, that is, home network includes a network for transmitting large amounts of data such as video and music information, and low-speed and inexpensive equipment for controlling various home appliances in the home. A system network is needed.

  In recent years, development of home systems that are safe, comfortable, and environmentally friendly has been promoted by connecting equipment such as air conditioners and equipment such as sensors through an equipment network and performing linked operation. For example, as an example, a home system using Echonet has been proposed (see Non-Patent Document 1).

  In Echonet, home appliances, sensors, controllers, and the like are connected via a wired or wireless network, and the controller performs centralized control of air-conditioning equipment in the network, monitoring of security sensors, and the like. An important issue in the construction of this system is the ease of installation and expansion. There is an urgent need to construct a wireless network that does not require wiring work during installation.

  On the other hand, in recent wireless communication, digital wireless communication devices that perform voice and data communication by the TDMA method have become widespread, and the home of the TDMA method using frequency hopping using the IMS band frequency band with less restrictions on applications in Japan. Construction of a wireless network for the system is underway. In a home system in which a network is constructed by wireless communication, a wireless communication device provided in a controller in the system is a wireless control station, and a wireless communication device provided in other white goods, sensors, etc. is a wireless dependent station. The controller and each device are connected by wireless communication.

  Next, a communication operation in a wireless network based on the TDMA method using frequency hopping will be described. A control station on the wireless network periodically transmits a control signal and simultaneously waits for a wireless signal for establishing a wireless link from a dependent station in each reception slot. At this time, the control station notifies the hopping pattern waiting in the corresponding frame by the control signal, and waits for the radio signal for establishing the radio link from the subordinate station while changing the hopping pattern waiting for each frame. On the other hand, the dependent station receives the control signal transmitted from the control station, establishes and maintains the TDMA and frequency hopping synchronization with the control station, and continues the standby state.

  When transmitting data from the subordinate station to the control station, the subordinate station selects an arbitrary slot from each receiving slot in which the control station waits for a radio signal for establishing a radio link from the subordinate station, and performs control. A frequency along the hopping pattern that the control station in the corresponding frame notified by the signal waits is selected, a request for establishing a radio link is transmitted to the control station, and reception of the reception slot corresponding to the transmission slot is started. The control station that has received the wireless link establishment request from the subordinate station fixes the hopping pattern of the received slot and the transmission slot corresponding to the received slot, and then transmits a response signal in the transmission slot. Bidirectional wireless communication is started with the dependent station that has transmitted the link establishment request.

When transmitting data from the control station to the dependent station, the dependent station always receives the slot for transmitting the control signal transmitted by the control station. Without establishing a wireless link, the control station superimposes the transmission data on the control signal and transmits the data to the dependent station by broadcast communication. The dependent station receives the transmission data sent together with the control signal. , Process. When the control station performs data transmission by broadcast communication, an identification code designating the destination dependent station is added to the control signal or transmission data and transmitted. On the dependent station side, the received signal is the data addressed to itself. Whether or not the received data is processed. The destination can be specified by specifying a single subordinate station, a plurality of subordinate stations in the same group, or all subordinate stations, and individual data transmission for each subordinate station, or simultaneous data to a plurality of subordinate stations. Transmission is possible.

  Next, the operation of the home system using the above-described wireless network will be described. Here, an example of a home system composed of a controller as a control station and an air conditioner as a plurality of subordinate stations will be shown. Each air conditioner can control the power ON / OFF, temperature setting, etc. from the controller, and the user operates each air conditioner from the operation panel of the controller. In addition, the controller periodically receives current room temperature data from each air conditioner and displays the data on the display panel. For example, when the user turns on the air conditioner, the air conditioner to be turned on is selected on the operation panel of the controller, and the power is turned on.

  In accordance with the operation of the user, the controller transmits the transmission data of the power ON command to the corresponding air conditioner by broadcast communication. The air conditioner that has received the power-on notification turns on the power, and when the power-on is completed normally, establishes a bidirectional wireless link with the controller and notifies the controller that the power is on. Then, the controller switches the operation state of the air conditioner displayed on the display panel to the ON state, and notifies the user that the air conditioner has been normally turned on.

  In addition, the user can turn on / off the power of all the air conditioners at the same time. When the user performs the simultaneous turn-on operation, the controller sends the power ON command transmission data to all the air conditioners. Sending by information communication. At this time, by setting the destination of the power-on command to all the dependent stations, the power-on command is notified to all the air conditioners with one command transmission. Then, each air conditioner that has received the power ON notification turns on the power, and when the power ON is completed normally, establishes a bidirectional wireless link with the controller and notifies the controller that the power is on, Each time the controller receives a notification from the air conditioner, it switches the operation state of each air conditioner displayed on the display panel to the ON state, and notifies the user that each air conditioner has been normally turned on.

In addition, the controller periodically transmits a command requesting room temperature information to all air conditioners. The command for requesting room temperature information at this time is performed by broadcast communication in which the designation of the destination is designated by all the dependent stations, and the transmission of the command is completed to all the air conditioners by one transmission. Each air conditioner that has received the command establishes a bidirectional wireless link with the controller and transmits room temperature information, and the controller updates the room temperature information for each air conditioner displayed on the display panel.
ECHONET SPECIFICATION Part 1 Outline of ECHONET

  However, in a wireless communication apparatus that transmits a request for establishing a wireless link from a dependent station to a control station at an arbitrary timing, an event that starts communication with the control station at the same time in a dependent station in the same wireless system occurs. However, there is a problem in that the communication start request sent from each subordinate station to the control station collides and communication becomes difficult.

  For example, when a home system wireless network is constructed using a conventional wireless communication device, a home system controller (control station) simultaneously controls a plurality of devices (subordinate stations) by broadcast communication, and a plurality of devices When notifying some kind of response, there are many cases where the transmission timing of the establishment request of the radio link transmitted from each subordinate station to the control station often overlaps, and there is a problem that the frequency of occurrence of reception errors in the control station increases. It was.

  In the wireless communication device of the present invention, when an event for simultaneously starting communication with a control station occurs in dependent stations in the same wireless system, requests for starting communication transmitted from the respective dependent stations to the control station collide. It is required not to.

  The present invention distributes a request for starting communication sent from each subordinate station to the control station when an event for simultaneously starting communication with the control station occurs in subordinate stations in the same radio system. It is an object of the present invention to provide a wireless communication apparatus that avoids collisions.

  In order to solve the above problems, a wireless communication device of the present invention uses a wireless communication device that performs time division multiplex communication (hereinafter referred to as TDMA) using a frequency hopping method, or a hopping pattern used for communication, or By determining one or both of the communication slots by a method determined in advance for each wireless communication device, the time from the occurrence of an event that requires wireless communication to the transmission of a wireless communication start request is determined for each wireless communication device. The main feature is to change to

  The wireless communication device according to the present invention uses a wireless communication device that performs TDMA communication using a frequency hopping method, and one or both of a hopping pattern and / or a communication slot used for communication is predetermined for each wireless communication device. By determining the method, the time from the occurrence of an event that requires wireless communication to the transmission of a request for starting wireless communication is changed for each wireless communication device. When a communication start event occurs, there is an advantage that the frequency of transmission failure such as transmission failure due to mutual radio interference due to collision is reduced.

  It is an object of the present invention to reduce the frequency of occurrence of communication failures such as transmission failure due to mutual radio interference when transmission start timings collide when a plurality of wireless communication devices simultaneously generate communication start events. This is realized by performing time division multiplex communication using a frequency hopping method, and selecting a hopping pattern or a communication slot at the start of communication based on unique information stored in the wireless communication device.

  In addition, the present invention reduces the frequency at which transmission start timings collide when a communication start event occurs simultaneously in a plurality of wireless communication devices, and communication failures such as transmission failures occur due to mutual wireless interference. The purpose is to perform time division multiplex communication using a frequency hopping method, and to select a hopping pattern or a communication slot at the start of communication by a selection means that selects based on a variable generated inside the wireless communication device. Realized by.

A first invention made to solve the above-mentioned problem is to perform time division multiplex communication (hereinafter referred to as TDMA) using a frequency hopping method, receive a control signal transmitted from one radio communication apparatus, and perform frequency hopping. And a wireless communication apparatus that performs communication in synchronization with TDMA, the storage means storing unique information for determining the hopping pattern at the time of transmission for each apparatus, and the transmission time based on the unique information stored in the storage means It is provided with a control means for controlling to start a wireless communication by determining a hopping pattern, and can be controlled based on information stored in a storage means from a communication start event occurrence, Call collision when an event occurs at the start of transmission simultaneously by setting different values for unique information stored in storage means in multiple wireless communication devices Those having an effect of preventing.

  A second invention made to solve the above problems performs time division multiplex communication using a frequency hopping method, receives a control signal transmitted by one radio communication device, and synchronizes frequency hopping and TDMA. A wireless communication device for performing communication, storing storage device for storing unique information for determining for each device both a hopping pattern and a communication slot at the time of transmission, and at the time of transmission based on the unique information stored in the storage device Control means for determining a combination of a hopping pattern and a communication slot and controlling to start wireless communication, and controlling the timing of starting transmission of a wireless signal from the occurrence of a communication start event based on information stored in the storage means By making the unique information stored in the storage means in a plurality of wireless communication devices different values, Those having an effect of preventing a call collision when an event occurs to the start signal.

  Further, when communication with the selected hopping pattern or a combination of the hopping pattern and the communication slot is not possible, the next hopping pattern based on the unique information stored in the storage means for newly storing the unique information, or It is characterized in that one or both of the communication slots are determined and control is performed so as to start wireless communication, and communication in the selected hopping pattern or communication slot is not possible, and again the hopping pattern or When selecting a communication slot and performing communication, the newly selected hopping pattern or the risk that the communication slot overlaps with other communication can be reduced, and at the same time, the effect of preventing a call collision when an event occurs at the start of transmission It is what has.

  A third invention made to solve the above-mentioned problem is characterized in that the unique information stored in the storage means is an extension number of a wireless communication device, and wireless communication comprising a plurality of communication devices. The system has an effect of easily reducing communication collisions by determining a hopping pattern or a communication slot to be used for communication based on an extension number that does not overlap in the wireless communication system in each system. .

  A fourth invention made to solve the above-mentioned problem is characterized in that the unique information stored in the storage means is identification information of a wireless communication device, and wireless communication comprising a plurality of communication devices. In the system, the hopping pattern used at the time of communication or the communication slot is determined for each device based on a unique number that is different for each wireless communication device, so that it is possible to easily reduce communication collisions.

  According to a fifth aspect of the present invention for solving the above problems, time division multiplex communication (hereinafter referred to as TDMA) using a frequency hopping method is performed, a control signal transmitted from one radio communication apparatus is received, and frequency hopping is performed. And a wireless communication apparatus that performs communication in synchronization with TDMA, and a selection unit that selects one or both of a hopping pattern during transmission and / or a communication slot based on a variable generated inside the wireless communication apparatus; , Including control means for controlling to start wireless communication based on one or both of the hopping pattern and / or communication slot selected by the selection means. A hopping pattern or communication slot is selected based on a variable generated inside the wireless communication device, and the selected hopping pattern or communication slot is selected. By which is adapted to control so as to perform communication using the bets, and has the effect of simultaneously transmitting the event begins in the plurality of wireless communication devices to reduce call collision when that occurred.

A sixth invention made to solve the above problems is newly generated inside a wireless communication device when communication with one or a combination of selected hopping patterns or communication slots is not possible. Based on the variable, one or both of the next hopping pattern and communication slot are determined and control is performed to start wireless communication. In the selected hopping pattern or communication slot, When communication is not possible and the hopping pattern or communication slot is selected again and communication is performed, the risk of overlapping the newly selected hopping pattern or communication slot with other communications can be reduced, and at the same time an event is started for transmission. This has the effect of preventing a call collision when a call occurs.

  The seventh invention made to solve the above-mentioned problem is to select a hopping pattern or a communication slot based on the elapsed time since the power is turned on, and the power on which is different for each wireless communication device. Since a hopping pattern or a communication slot is selected based on the elapsed time from the time, it has an effect of reducing call collision when a transmission start event occurs simultaneously in a plurality of wireless communication apparatuses.

  An eighth invention made to solve the above-mentioned problem is to select a hopping pattern or a communication slot based on an elapsed time from the previous communication, and is different for each wireless communication device. Since a hopping pattern or a communication slot is selected based on the elapsed time from the time of communication, there is an effect of reducing call collision when a transmission start event occurs simultaneously in a plurality of wireless communication devices. .

(Embodiment 1)
Embodiment 1 of the present invention will be described below with reference to the drawings. In the first embodiment, a radio communication apparatus that performs TDMA communication using a frequency hopping method, and an event that simultaneously starts communication with a control station occurs in a dependent station in the same radio system that is the object of the present invention. An example of a wireless communication device that distributes communication start requests sent from the respective dependent stations to the control station and avoids collision of wireless signals is shown.

  FIG. 1 is a block diagram of a system in which a controller and an air conditioner are connected via a wireless network using a wireless communication apparatus that performs TDMA communication using the frequency hopping method of the present invention. FIG. 2 is an explanatory diagram for explaining an operation during standby of the wireless communication apparatus according to the first embodiment of the present invention. FIG. 3 is an explanatory diagram for explaining an operation during communication of the wireless communication apparatus according to the first embodiment of the present invention. FIG. 4 is an explanatory diagram showing the data format of the slot used in the communication of the wireless communication apparatus according to the first embodiment of the present invention. (Table 1) is a hopping table of the wireless communication apparatus according to the second embodiment.

In FIG. 1, reference numeral 300 denotes a control station having a function of controlling devices on the wireless network, and reference numeral 400 denotes a dependent station including non-control devices (for example, air conditioners) on the wireless network controlled by the control station 300. In the example of FIG. 1, the dependent station 400 is obtained by connecting a wireless unit 420 to the air conditioner main body 220. A plurality of dependent stations (such as air conditioners) on the wireless network can be connected, but the configuration of each air conditioner is the same as that of the dependent station 400 of FIG.

  The control station 300 includes a controller unit 120 and a radio unit 320. The controller unit 120 includes a controller main body 121 that controls each device on the wireless network, manages and displays the state of each device, and an operation unit 122 that inputs an operation of the controller 100. The wireless unit 320 includes an antenna 301. A radio unit 302 that performs TDMA-TDD radio communication using frequency hopping that modulates, amplifies and outputs an input data string, amplifies and demodulates a received radio signal, and outputs received data; The control signal and the communication signal are added with a synchronization signal necessary for TDMA-TDD communication and an error detection signal for error detection, and a transmission data string is generated in accordance with the TDMA frame and slot, and the received data string is received. Error detection processing according to the TDMA frame and slot. A frame processing unit 303 that outputs control signals, communication signals, and the like received by the host, and notifies the timing of frame and slot to the control unit 310, which will be described later, and a hopping that stores a hopping pattern used for frequency hopping A pattern storage unit 308 and a control unit 310 that controls the entire wireless unit 320 are configured.

  The slave station 400 includes an air conditioner main body 220 and a wireless unit 420. The radio unit 420 modulates, amplifies and outputs the antenna 401 and the input data string, amplifies and demodulates the received radio signal, and outputs TDMA-TDD radio using frequency hopping which outputs received data. Adds a synchronization signal necessary for TDMA-TDD communication and an error detection signal for error detection to the radio unit 402 that performs communication, a control signal, and a communication signal, and generates a transmission data string in accordance with the TDMA frame and slot. Then, error detection processing is performed in accordance with the TDMA frame and slot from the received data sequence received, and a control signal, a communication signal, etc. received in the slot without error are output, and a control unit 410 to be described later A frame processing unit 403 that notifies the timing of the frame and slot, and a hopping pattern used for frequency hopping. Hopping pattern storing unit 408 憶, a transmission timing storage unit 409 for storing the slot and hopping pattern to transmit, and a control unit 410 for controlling the whole radio unit 420.

  Next, the operation of the wireless communication apparatus according to the first embodiment configured as described above will be described. In the radio communication apparatus according to the first embodiment, radio unit 320 of control station 300 operates as a control station, and radio unit 420 of each dependent station 400 operates as a dependent station. The state of the wireless unit 320 operating as a control station and the wireless unit 420 operating as a dependent station is determined by placing the control signal of the dependent station 400 such as simultaneous power ON from the control station 300 on the communication signal from the wireless unit 320 to the wireless unit 420. A broadcast communication state to be transmitted, a bidirectional communication state in which a bidirectional wireless link is established and communication is performed in order to transmit a response to a control signal such as simultaneous power ON from the subordinate station 400 to the control station 300; There are three states, i.e., the idle state, receiving the control signal transmitted from the unit 320 and waiting.

  First, the operation in the idle state will be described.

In the idle state, the wireless unit 320 periodically transmits a control signal in a specific slot in the frame, and a slot (hereinafter referred to as a control slot) that transmits its identification information and control signal by this control signal. ) Number and hopping pattern, reception slot standby hopping pattern, call signal, and the like. At this time, the control slot is transmitted in the format of FIG. 4 (A), a synchronization signal and a signal for detecting an error in the control data field (CRC 1 in FIG. 4) are added, and the control signal is transmitted in the control data field. .

  That is, the control unit 310 outputs a control signal to the frame processing unit 303 in accordance with the timing of the control slot based on the slot timing notified from the frame processing unit 303. Further, the control unit 310 refers to the hopping pattern storage unit 308, determines the transmission frequency based on the hopping pattern used in the control slot and the index managed in the control unit 310, and determines the control slot. The wireless unit 302 is controlled so as to perform transmission. Then, the frame processing unit 303 attaches a synchronization signal and a signal for detecting an error in the control data field (CRC 1 in FIG. 4) to the control signal input from the control unit 310, and outputs the control signal to the radio unit 302. Is modulated and amplified by the radio section 302 and transmitted from the antenna 301.

  Further, the wireless unit 320 controls the establishment request of the wireless link from the wireless unit 420 in a receiving slot (hereinafter referred to as a standby slot) excluding the receiving slot corresponding to the control slot among the receiving slots in the frame in the idle state. Receives the signal.

  That is, the control unit 310 refers to the hopping pattern storage unit 308 in accordance with the timing of the standby slot based on the slot timing notified from the frame processing unit 303, and selects the standby hopping pattern based on the index. The reception frequency is determined based on the selected hopping pattern and index, and the radio unit 302 is controlled so that reception is performed at the determined frequency of the standby slot. When the control signal for establishing the wireless link from the wireless unit 420 is received and the received data is output to the frame processing unit 303, the frame processing unit 303 uses the synchronization signal to control the control data field and error detection. Signal is determined, an error is determined, a data string in the control data field in which there is no error, that is, a control signal for requesting establishment of a wireless link is notified to the control unit 310, and bidirectional wireless communication with the wireless unit 420 is performed. The link establishment operation is activated.

  Next, the operation of the wireless unit 320 in the idle state will be described using FIG. 2 and (Table 1). FIG. 2 shows a TDMA-TDD scheme in which one frame is divided into eight slots, slot 1 to slot 8, and wireless unit 320 transmits from slot 1 to slot 4 and wireless unit 420 transmits from slot 5 to slot 8. An example is shown. Further, an example is shown in which control signals are transmitted in slot 1 using hopping pattern 1 (P1), and in frame 1, the index starts from 1. Table 1 shows a correspondence example of communication frequencies determined from the index and the hopping pattern.

  That is, the wireless unit 320 transmits a control signal using the hopping pattern 1 (P1) in the slot 1 of each frame. In this example, since the index is 1 in the frame 1, transmission is performed at f1, In frame 2, since index = 2, transmission is performed at f2. Similarly, the index circulates values from 1 to 10 for each frame, and a control signal is transmitted at each frequency of hopping pattern 1 (P1) according to the index. Is sent.

  The wireless unit 320 receives the standby slots (slot 6, slot 7, and slot 8 in the example of FIG. 2) while sequentially switching the standby hopping pattern for each frame. That is, when the standby slot of frame 1 is waited by hopping pattern 2 (P2), frame 2 waits for hopping pattern 3 (P3), and thereafter hopping patterns are circulated from P0 to P9 for each frame. Wait. Therefore, since the index = 1 in the standby slot of frame 1 and hopping pattern 2 (P2), reception is performed at f2, and in the standby slot of frame 2, reception is performed at f4 because of index = 2 and hopping pattern 3 (P3). Thereafter, similarly, the reception frequency is determined according to the index and the hopping pattern, and reception is performed.

  Next, the operation of the wireless unit 420 in the idle state will be described. In the idle state, the wireless unit 420 establishes synchronization with the control station supplementary operation state that establishes synchronization with the wireless unit 320 and synchronization with the wireless unit 320 and continues to receive the control signal of the wireless unit 320. Operation is different in the established state.

  First, the operation in the control station supplementary operation state will be described. When synchronization with the wireless unit 320 has not been established yet, for example, immediately after the power is turned on, the wireless unit 420 enters a control station supplementary operation state, and searches for a control signal of the wireless unit 320 by continuous reception. Performs operations to establish frame, slot, and frequency hopping synchronization. In order to receive the control signal of the wireless unit 320, the wireless unit 420 continuously receives one of the frequencies at which the wireless unit 320 is transmitting the control signal, and performs a supplementary operation of the wireless unit 320. When the control signal of the wireless unit 320 is received by continuous reception, the reception is performed while changing the reception frequency sequentially for each frame, and the control signal of the wireless unit 320 is continuously received. Then, the information of the transmission slot number and the hopping pattern used to transmit the control signal included in the control signal of the wireless unit 320 is received, and the frame, slot, and frequency hopping synchronization with the wireless unit 320 is established. That is, the control unit 410 reads any one frequency stored in the hopping pattern storage unit 408 and performs control so that the radio unit 402 continuously receives the read frequency.

  The reception data string received and demodulated by the radio unit 402 is output to the frame processing unit 403. The frame processing unit 403 detects the synchronization signal included in the received data string. When the synchronization signal is detected, the control data field and the error detection signal are separated based on the synchronization signal, and the received error detection is performed. The control data field error is determined based on the signal for use, and if it is determined that reception is normal, the received data string of the received control data field is output to the control unit 410.

  The control unit 410 analyzes the received data string input from the frame processing unit 403, determines whether or not the wireless unit 320 is to wait based on the identification information of the wireless unit 320 included in the control signal, If the wireless unit 320 is about to wait, control is performed so as to shift to an intermittent reception operation for each frame. That is, the control unit 410 reads the reception frequency sequentially from the hopping pattern storage unit 408 based on the index managed by the control unit 410 in the same manner as the wireless unit 320, and changes the reception frequency in each frame first. Radio unit 402 is controlled to receive the control signal according to the timing of the slot that received the control signal.

  When the frequency read from the hopping pattern storage unit 408 when the control unit 410 continuously receives is f0 corresponding to the index 1 of the hopping pattern 0 (P0), the control signal of f0 is received by continuous reception. After that, the index is incremented by one for each frame and received as f1, f2,. When receiving the information of the transmission slot number and the hopping pattern used to transmit the control signal included in the control signal transmitted by the wireless unit 320, the synchronization between the wireless unit 320 and the slot and the frequency hopping, that is, Establish index synchronization. The control unit 410 determines the slot that has received the control signal based on the slot number included in the received control signal, and notifies the frame processing unit 403 of the slot number that has received the control signal.

The frame processing unit 403 changes the timing so that the slot that has received the control signal is received by the notified slot number, and shifts to a state in which TDMA synchronization with the wireless unit 320 is established. It operates to notify the timing of frames and slots. The control unit 410 also receives information on the hopping pattern of the control station standby slot included in the control signal, synchronizes with the control of the frequency hopping in the control station standby slot, and prepares for transmission to establish a link. Control of frequency hopping of the slot (control station standby slot) is started.

  In this way, the wireless unit 420 that has established synchronization of the frame, slot, and frequency hopping with the wireless unit 320 changes from the control station supplementary operation state to the synchronization establishment state that continuously receives the control signal of the control station. Thereafter, the control unit 410 updates the index for each frame based on the frame and slot timing notified from the frame processing unit, and matches the index and control slot hopping patterns according to the control slot timing. Is read from the hopping pattern storage unit 408, the reception frequency of the radio unit 402 is set, and control is performed so as to receive the control slot.

  Next, the operation in the broadcast communication state will be described. When it is detected by the operation unit 122 of the control station 300 that the simultaneous power-on operation of the air conditioner has been performed and the controller main body 121 requests the control unit 310 to transmit the simultaneous power-on, the control station 300 In 420, a transition is made to a broadcast communication state in which a communication signal is transmitted.

  First, the control unit 310 performs control based on the frame and slot timing notified from the frame processing unit 303 in order to transmit a control signal (hereinafter referred to as broadcast information) for notifying the start of transmission of a communication signal. Broadcast information is output to the frame processing unit 303 in accordance with the slot timing. The frame processing unit 303 puts broadcast information on the control data field, attaches a synchronization signal and an error detection signal, and outputs the signal to the radio unit 302. The radio unit 302 modulates the data string input from the frame processing unit 303 and transmits the antenna. Broadcast information is transmitted via 301. Subsequently, the control unit 310 notifies the frame processing unit 303 of the start of transmission of the communication signal.

  After notifying the frame processing unit 303 of the start of transmission of the communication signal, the control unit 310 matches the timing of the control slot that transmits the communication signal based on the frame and slot timing of the control slot notified from the frame processing unit 303. The hopping pattern used in the control slot and the control unit 310 are managed by referring to the hopping pattern storage unit 308 while outputting a communication signal for notifying simultaneous power ON from the controller main body 121 to the frame processing unit 303. The transmission frequency is determined based on the index to be transmitted, and the radio unit 302 is controlled to perform transmission at the determined frequency. At this time, the control slot continues to use the hopping pattern that was used before transmitting the communication signal. When transmitting a communication signal, the format of FIG. 4B is used, and the communication signal is transmitted in the information data field. Then, the control unit 310 performs power control of the transmission circuit of the wireless unit 302 in accordance with the format of FIG.

  Next, the operation of the wireless unit 420 in the broadcast communication state will be described. The wireless unit 420 receives the control signal transmitted from the wireless unit 320 in the idle state, and receives the notification information transmitted by the wireless unit 320 in the same slot as the control signal transmission slot, Transition to the broadcast communication state.

  When receiving the broadcast information, the control unit 410 of the wireless unit 420 controls the frame processing unit 403 and the wireless unit 402 so as to receive a signal in the format shown in FIG.

As described above, when the state transits to the broadcast communication state and a communication signal is transmitted from the wireless unit 320, the wireless signal of the corresponding slot is received and demodulated by the wireless unit 402 of the wireless unit 420, and the received data string is a frame. The data is output to the processing unit 403. The frame processing unit 403 separates the communication signal sent in the information data field and the error detection signal based on the synchronization signal of the received data string of the slot that receives the communication signal, and if there is no error, the received communication signal Is notified to the control unit 410. Control unit 410 outputs the notified communication signal to air conditioner body 220. The air conditioner body 220 controls the operating state of the air conditioner based on the notified communication signal. As described above, when the simultaneous power ON is notified from the control station 300, the air conditioner main body 220 turns on the power and notifies the control station 300 of an operation state change notification, that is, a power ON response signal. Move to operation.

  Next, the operation in the bidirectional communication state for notifying each control station 300 of a response signal from each dependent station 400 will be described. When a request for transmitting a power ON response signal is sent from the air conditioner body 220 to the control unit 410, the state shifts to a bidirectional communication state in which a communication signal is transmitted to the wireless unit 320.

  When the power ON response signal is transmitted from the air conditioner body 220 to the control unit 410, the control unit 410 of the wireless unit 420 refers to the transmission timing storage unit 409, determines the communication slot and the hopping pattern, and determines the wireless unit. A control signal for establishing a radio link is output to the frame processing unit 403 based on the slot timing notified from the frame processing unit 403 in accordance with the control of the hopping pattern of 320 waiting slots. The frame processing unit 403 places a control signal for establishing a wireless link in the control data field, adds a synchronization signal and an error detection signal to the wireless unit 402, and the wireless unit 402 receives the input from the frame processing unit 403. A data string is modulated and a control signal for requesting establishment of a radio link is transmitted via the antenna 401. In addition, the control unit 410 transmits a control signal for establishing a radio link so as to wait for a response from the radio unit 320 in a slot that has a predetermined positional relationship with the slot that has transmitted the control signal for establishing a radio link. The radio unit 402 and the frame processing unit 403 are controlled to start reception using the same hopping pattern used in the slot.

  When a response signal is received from the wireless unit 320, a communication signal for notifying a response signal for turning on the power is output to the frame processing unit 403 in accordance with the timing of the transmission slot notified from the frame processing unit 403. The frame processing unit 403 generates a transmission data string by adding a synchronization signal and an error detection signal (CRC2) to the information data field in the slot that transmitted the wireless link establishment request, and outputs it to the wireless unit 402 At the same time, the communication signal and the error detection signal (CRC2) are separated based on the synchronization signal from the received data string of the slot for receiving (the slot that has received the response signal) input from the wireless unit 402, and the slot that has no error. The communication signal is output to the control unit 410.

On the other hand, when the wireless unit 320 receives the wireless link establishment request from the wireless unit 420 in the standby slot, the wireless unit 320 transmits a response signal in a slot that has a predetermined positional relationship with the slot that has received the wireless link establishment request. Thereafter, the hopping pattern of the slot that has received a wireless link establishment request and the slot that has a predetermined positional relationship with the slot that has received the wireless link establishment request is fixed to the hopping pattern that was used when the wireless link establishment request was received. Then, control is performed so that communication signals are communicated. That is, when the wireless link establishment request is received in the standby slot and the frame processing unit 303 notifies the wireless link establishment request, the control unit 310 determines the slot from which the wireless link establishment request has been received and a predetermined position. Refer to the hopping pattern storage unit 308 according to the timing of the related slot, select the same hopping pattern as the hopping pattern that received the wireless link establishment request, and transmit frequency based on the index managed inside the control unit The wireless unit 302 is controlled to perform transmission at the determined frequency, and a response signal is output to the frame processing unit 303. The frame processing unit 303 puts a response signal in the control data field, adds a synchronization signal and an error detection signal, and outputs the signal to the wireless unit 302. The wireless unit 302 modulates the data string input from the frame processing unit 303 and transmits the antenna. A response signal is transmitted via 301.

  Thereafter, the control unit 310 outputs the communication signal to the frame processing unit 303, and the frame processing unit 303 puts the communication signal input from the control unit 310 in the information data field in the slot in which the response signal is transmitted. And an error detection signal (CRC2) are added to generate a transmission data sequence, which is output to the radio unit 302, and based on the synchronization signal from the received data sequence of the slot that received the radio link establishment request input from the radio unit 302. The communication signal and the error detection signal (CRC2) are separated from each other, and the communication signal of the slot having no error is output to the control unit 310. Then, control unit 310 outputs the communication signal received from dependent station 400 to controller body 121.

  As described above, if the communication signal received from the dependent station 400 is a response to the power ON, the controller main body 121 displays that the power of the dependent station 400 is turned on and notifies the user. When the controller main body 121 receives the power-on response, the controller main body 121 requests the control unit 310 to transmit a response reception confirmation. The communication signal for notifying the response reception confirmation is transmitted to the dependent station 400 using the communication path for bidirectional communication with the already established dependent station 400 described above. Then, the dependent station 400 receives the response reception confirmation to disconnect the bidirectional communication, and the wireless unit 420 transitions to the idle state.

  Next, transition from the broadcast communication state to the bidirectional communication state will be described with reference to FIG. In the example of FIG. 3, the control slot is slot 1 and bidirectional communication is started using slot 3 and slot 7. Further, an example is shown in which the index starts from frame 21 and the reception hopping pattern of the standby slot starts with 2. Also, the numbers in the transmission / reception columns of the control station (controller side) and the dependent station (air conditioner side) in FIG. 3 indicate frequencies (f is omitted, and 1 indicates f1).

  In FIG. 3, when the wireless unit 420 starts shifting to the two-way communication state, the wireless unit 420 waits for the wireless unit 320 based on the transmission slot and communication frequency stored in the transmission timing storage unit 409. One slot is selected, and transmission is started in accordance with the control of the communication frequency of the standby slot of the wireless unit 320. The example of FIG. 3 shows an example in which the wireless unit receives an event (for example, a power-on notification) that requires bidirectional communication in the frame 21, and shifts to the bidirectional communication state. An example of transition to the bidirectional communication state when the transmission slot stored in the storage unit 409 is 7 and the hopping pattern is P3 (index = 2) is shown.

  In the example of FIG. 3, when the wireless unit receives an event that requires bidirectional communication in the frame 21 (for example, a power-on notification), the wireless unit 420 sets the hopping pattern on which the control station waits to 3 (P3). Waiting for the frame 22, transmission starts in the slot 7. At this time, the wireless link establishment request is transmitted at the frequency f4 corresponding to the index 2 of the frame 22. After frame 23, bidirectional communication with wireless unit 320 is started at slot 7 and slot 3 corresponding to slot 7 at a transmission / reception frequency corresponding to the index of each frame in hopping pattern 3 (P3).

On the other hand, when the wireless unit 320 receives the wireless link establishment request in the slot 7 of the frame 22, the same hopping pattern as when the wireless link establishment request is received in the slot 3 corresponding to the slot 7 in the next frame 23. A pattern is selected, and a response signal is transmitted at a transmission frequency f5 corresponding to hopping pattern 3 (P3) and index 3. Thereafter, each frame is transmitted in slot 7 and slot 3 corresponding to slot 7 by hopping pattern 3 (P3). Bidirectional communication with the wireless unit 420 is started at a transmission / reception frequency corresponding to the index.

  Next, the transition from the bidirectional communication state to the idle state will be described.

  As described above, the slave station 400 receives a simultaneous power-on notification by broadcast communication, transmits a power-on response signal by bidirectional communication, and receives a communication signal for notifying a response reception confirmation. The control unit 410 outputs a disconnection control signal to the frame processing unit 403 in synchronization with the timing of the slot that is transmitting the bidirectional communication, and the disconnection control signal is transmitted when the control signal for establishing the radio link is transmitted. The radio unit 402 is transmitted in the same manner as described above. When the control signal for confirming the disconnection is received from the control station 300, the transmission / reception of the slot in which the two-way communication has been performed is stopped, the control shifts to the reception of only the control slot, and the transition is made to the idle state.

  On the other hand, when receiving the disconnection control signal from the dependent station 400, the control station 300 controls the disconnection confirmation in the same manner as when the response signal for the request for establishment of the radio link is transmitted in the slot that has transmitted the communication signal. A signal is transmitted, transmission / reception of the slot that was performing bidirectional communication is stopped, and a transition is made to an idle state in which a control signal is transmitted in the control slot.

  Next, the setting of the transmission start timing on the dependent station side (non-control device side) in the first embodiment will be described. When there are a plurality of air conditioners that are non-control devices according to the first embodiment, the non-control devices (hereinafter referred to as air conditioners) are turned on all at once as in the example described above, and a response signal is transmitted to the simultaneous power ON. When an event that starts transmission communication at the same time occurs as described above, the timing at which transmission of a radio signal is actually started is determined by the stored contents of the transmission timing storage unit 409. When a plurality of air conditioners are controlled by a single control station, different values are stored in the slots and hopping patterns of the transmission timing storage unit 409 of each air conditioner.

  One example of a method of setting different values is a method of determining based on the identification number of each air conditioner. That is, when a plurality of air conditioners are controlled by the control station 300, each air conditioner is registered in the control station 300 in advance, and at this time, one non-overlapping number is assigned to each air conditioner by the control station 300. Based on the assigned number, the slot of the transmission timing storage unit 409 and the hopping pattern are determined for each device. For example, the air conditioner 1 assigned number 1 is determined as slot 4 and hopping pattern 1, and the air conditioner 2 assigned number 2 is determined as slot 5 and hopping pattern 2. In this way, slots and hopping patterns are determined according to a certain rule based on the numbers assigned to the air conditioners 1 and 2.

  Next, the operation when a plurality of dependent stations simultaneously shift to the transmission operation will be described with reference to FIG. In the example of FIG. 5, the two air conditioners 1 and 2 are turned on simultaneously as the subordinate station 400, and the two air conditioners that have received the “simultaneous power ON” request from the control station 300 are controlled. An example of operation in response to the station 300 is shown. In this operation example, a slot for transmitting a control signal from the control station 300 to each air conditioner and a message in broadcast communication is performed in the slot 1, and a slot used for bidirectional communication between the air conditioner 1 and the control station 300 is a slot. 6. Example of P3 as hopping pattern, Slot 7 as slot used for bidirectional communication between air conditioner 2 and control station 300, P4 as hopping pattern, and control of TDMA frame, slot configuration, frequency hopping, standby, etc. These show examples in the case where control similar to that of the wireless communication apparatus of the first embodiment is performed.

  In FIG. 5, the control station 300 transmits a “simultaneous power ON” request in slot 1 of the frame 21.

  The air conditioner 1 and the air conditioner 2 which are the dependent stations that have received this message turn on the power, and shift to an operation to notify the control station that the power is turned on. That is, the air conditioner 1 and the air conditioner 2 that have received the request of “simultaneous power ON”, turn on the power, select the transmission slot and hopping pattern stored in the transmission timing storage unit, and send the “power ON response” to the control station. Operates to send. In the example of FIG. 5, the air conditioner 1 shows an example in which the slot 6 and the hopping pattern 3 are selected to perform bidirectional communication with the control station, and the control station waits for the frame 22 for waiting for the hopping pattern 3. Then, a “link establishment request” is transmitted in slot 6, a bidirectional wireless communication path with the control station is established in slot 2 and slot 6, and a “power ON response” is notified to the control station. On the other hand, the air conditioner 2 shows an example in which the slot 7 and the hopping pattern 4 are selected to perform bidirectional communication with the control station. The control station waits for the frame 23 for waiting for the hopping pattern 4 before the slot 7 Then, a “link establishment request” is transmitted, a bidirectional wireless communication path with the control station is established in slot 3 and slot 7, and a “power ON response” is notified to the control station.

  In this way, when an event that requires transmission simultaneously occurs in a plurality of wireless communication devices, the wireless communication device of the present invention sets different values for the communication slot and hopping pattern selected during communication for each wireless communication device. By doing so, it becomes possible to prevent call collision, and it is possible to eliminate the occurrence of connection failure due to mutual radio interference.

Next, the registration number in this method will be described.
Since the transmission timing is determined by a combination of slot and hopping pattern, in order to avoid call collision at the time of simultaneous transmission, the number of control stations that can be registered in one system is the number of usable slots, the number of hopping patterns, and Limited by the product of Therefore, by increasing the hopping pattern depending on the number of control stations, it is possible to avoid call collision without depending on the number of control stations.

  In addition, when the number of control stations is small, a method of assigning only slots used for transmission to control stations is also effective.

  For example, when two air conditioners are controlled by one control station in the example of FIG. 5, it is also effective to store only the slots used at the time of transmission in the transmission timing storage unit and assign the transmission slots for each air conditioner. In this case, when a transmission start event occurs, each air conditioner can immediately start transmission in the hopping pattern that the control station waits in the next frame 22, and the air conditioner 2 also uses the frame 22 and hopping pattern 3 to “link”. It is possible to shorten the waiting time from the occurrence of the transmission start event to the start of communication.

  In the above description of the first embodiment, a method has been described in which each dependent station selects one slot or a combination of a slot and a hopping pattern to start communication and communicates with the control station. As another application example, a method of storing a plurality of slots or combinations of slots and hopping patterns used at the time of communication in the transmission timing storage unit 409, setting priority levels, and selecting them in order of priority is also possible. In this method, the slot with the highest priority, or a combination of a slot and a hopping pattern, such as when the first selected slot is in use, or when communication with the selected hopping pattern is not possible due to interference, etc. If a connection with the control station cannot be established, it is possible to try communication with the control station again with the slot with the next highest priority or with a combination of a slot and a hopping pattern.

  Table 2 shows an example of combinations of a plurality of slots and hopping patterns with priorities stored in the transmission timing storage unit 409. (Table 2) shows combinations of slots and hopping patterns that four subordinate stations select at the time of communication. For example, subordinate station A first communicates with the control station at slot 5 and hopping pattern P0 at the start of communication. When the connection with the control station fails, the communication with the control station is performed using the next slot 6 and the hopping pattern P1, and each time the connection with the control station fails thereafter. It operates to communicate with the control station using a combination of the next priority slot and the hopping pattern.

  According to (Table 2), when each dependent station starts communication at the same time, for example, when slot 5 cannot be used for bidirectional communication because of the opposite slot of the control signal transmission slot from the control station, dependent station A It operates so as to communicate with the control station in slot 6 having a priority of 2 and hopping pattern P1. On the other hand, the dependent station B also operates to communicate in the slot 6, but no call collision occurs because the selected hopping pattern is different. After the transmission start event occurs, when the standby hopping pattern of the control station becomes P0 that the dependent station B tries to transmit before P1 that the dependent station A tries to transmit, in slot 6, the control station and the dependent station Communication with B is started. After that, even if transmission from the dependent station A to the control station is started with the hopping pattern P1, the hopping pattern (communication frequency) between the control station and the dependent station B is different. Does not interfere with communication.

  Next, the operation when all slots are in use will be described. When the number of subordinate stations is larger than the number of slots that can be communicated simultaneously by the control station, a case may occur in which all slots are in use. In such a system, when each dependent station performs an operation to start communication at the same time, in order to select a slot efficiently, the control station uses the control signal to indicate information on the slot in use or available slot. The dependent station notifies the dependent station, and the dependent station operates to perform communication with the control station by selecting an empty slot according to the slot use status notified from the control station.

That is, when a communication start event occurs, the subordinate station selects a combination of a slot having a higher priority and a hopping pattern from the transmittable slots notified from the control station, and operates to start communication. . If all slots are in use, wait until the control station notifies that one of the slots is empty (can be transmitted), and after being notified that the slot is empty, The hopping pattern is selected according to the priority order, and the transmission is started.

  Next, the dependent stations A to D that select slots and communication frequencies in the priority order of (Table 2) are in a state in which all slots are unusable, that is, the control station is a dependent station other than the dependent stations A to D. An operation when a transmission start event occurs in the dependent stations A to D in a communication state and one slot can be used will be described.

  When all slots are in use and a transmission start event occurs in each dependent station A to D that selects a slot and a hopping pattern in the priority order of (Table 2), each dependent station It waits until the control station notifies that any one of slots 5 to 8 has become usable. When the control station notifies that one of the slots is available, each subordinate station A to D starts an operation to start communication with the control station in the available slot. To do. At this time, each of the dependent stations A to D simultaneously starts an operation to start communication with the control station in the same slot, but the hopping pattern (communication frequency) selected by each dependent station is different. The transmission start timing, i.e., the transmission start frames do not overlap, and each transmission signal does not interfere with the communication of other subordinate stations.

For example, when slot 6 becomes available, dependent station A operates to start transmission with P1 hopping pattern, and dependent station B operates to start transmission with P0 hopping pattern, The dependent station C operates to start transmission with the hopping pattern of P3, and the dependent station D operates to start transmission with the hopping pattern of P2, and a different hopping pattern (communication frequency) is selected to start communication. Perform the operation.
As described above, when each dependent station selects a slot and a hopping pattern in accordance with the priority order, the selection order of the slot and the hopping pattern of each dependent station is such that each dependent station operates to perform communication in the same slot. Then, it is decided to select different hopping patterns. In addition, the slots selected by each dependent station are evenly distributed over the entire transmittable slots.

(Embodiment 2)
Furthermore, another embodiment of the present invention will be described. The second embodiment is a radio communication apparatus that performs TDMA communication using the frequency hopping method as in the first embodiment. In the subordinate station in the same radio system that is the object of the present invention, communication is simultaneously performed to the control station. An example of a wireless communication apparatus that distributes a request to start communication sent from each dependent station to a control station when a start event occurs and avoids collision of wireless signals is shown.

  FIG. 6 is a block diagram of an air conditioner in a system in which a control station and an air conditioner are connected by a wireless network using a wireless communication apparatus that performs TDMA communication using the frequency hopping method of the present invention.

  In the second embodiment, the block configuration on the control station side is the same as that of the control station 300 in the first embodiment, and a description thereof will be omitted. In FIG. 6, blocks having the same effect and action as those of the air conditioner of the first embodiment are given the same reference numerals and description thereof is omitted.

In FIG. 6, the wireless unit 520 of the air conditioner 500 is a value from 0 to [number of usable slots × number of hopping patterns−1] at regular intervals from when the power is turned on, instead of the transmission timing storage unit 409 of FIG. 1. A timing unit 531 that circulates and counts, a transmission slot at the start of transmission based on the value counted by the timing unit 531, and a transmission timing determination unit 530 that determines a hopping pattern are provided to control the wireless unit 520. A control unit 510 is provided.

  Next, the operation of the wireless communication apparatus according to the second embodiment configured as described above will be described. The wireless communication device according to the second embodiment is different from the wireless communication device according to the first embodiment in the method of determining the transmission timing when transmitting from the air conditioner side to the control station side.

  When the power of wireless unit 520 of Embodiment 2 is turned on, timer unit 531 starts counting up. For example, as shown in FIG. 2 and FIG. 3, one frame is divided into eight slots from slot 1 to slot 8, the control station transmits from slot 1 to slot 4, and the dependent station transmits from slot 5 to slot 8. When TDMA-TDD is performed and there are 10 hopping patterns as shown in Table 1, the number of transmission slots that can be used by the dependent station 400 for bidirectional communication is determined by the control station 300 transmitting a control signal. Since there are three slots excluding the transmission slots corresponding to the slots, the timer unit 531 takes values from 0 to 29. The transmission timing determination unit 530 associates 30 combinations of the three slots and 10 types of hopping patterns with the values from 0 to 29 of the time measuring unit 531, and hops the transmission slots based on the values of the time measuring unit 531. Determine the pattern combination.

  As in the first embodiment, when an event for transmission from the air conditioner main body 220 to the control unit 510 is received, for example, by receiving a simultaneous power ON signal from the control station 300, the control unit 510 transmits the transmission timing. The transmission slot and hopping pattern determined by the determination unit 530 are read, the slot and hopping pattern to be transmitted are determined, and transmission to the control station 300 is started.

  In the example of the second embodiment, an example of the method for determining the transmission slot and the hopping pattern based on the elapsed time from the power-on of the wireless unit is shown. By determining the transmission slot and hopping pattern based on the values that change inherently for each dependent station at the start of communication, such as the time elapsed since In this case, the frequency of occurrence of call collision can be reduced.

  As described above, according to the present invention, the actual transmission start timing from the occurrence of a communication start event is delayed based on a unique value for each wireless communication device or a value that changes for each event occurrence. Therefore, it is possible to avoid a call collision when a communication start event occurs simultaneously in a plurality of wireless communication devices, and it is possible to improve connectivity with a control station.

  Also, in the case of a wireless communication device using the TDMA communication method, a plurality of wireless communication devices can be obtained while changing a slot to be transmitted for each wireless communication device to reduce a delay in actual transmission start timing from occurrence of a communication start event. Thus, it is possible to avoid a call collision when a communication start event occurs at the same time, and it is possible to improve the connectivity with the control station without degrading the response speed.

  In this embodiment, an example in which control signals are communicated between a control station and a plurality of air conditioners in the wireless communication device of the present invention is shown. However, in a wireless communication device for voice calls such as a cordless phone, simultaneous transmission is also possible. There may be a case where a call collision occurs as in the case where a plurality of slave units automatically answer at the time of an incoming call, and the present invention is also useful in a wireless communication apparatus for voice communication.

  The present invention relates to a wireless communication device, and when a communication start event occurs simultaneously in a plurality of wireless communication devices, the frequency of transmission failures such as transmission failure due to mutual wireless interference due to collision of transmissions is reduced. There is an advantage of doing.

1 is a block diagram of a system in which a control station and a dependent station are wirelessly connected in the wireless communication apparatus according to the first embodiment of the present invention. Explanatory drawing explaining operation | movement in standby of the radio | wireless communication apparatus of Embodiment 1 of this invention Explanatory drawing explaining the operation | movement in communication of the radio | wireless communication apparatus of Embodiment 1 of this invention. Explanatory drawing which shows the data format used by communication of the radio | wireless communication apparatus of Embodiment 1 of this invention FIG. 3 is a sequence diagram for explaining a communication operation of the wireless communication apparatus according to the first embodiment of the present invention. Block diagram of a dependent station using a radio communication apparatus that performs TDMA communication in Embodiment 2 of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 120 Controller unit 121 Controller main body 122 Operation part 220 Air-conditioner main body 300 Control station 301 Antenna 302 Radio | wireless part 303 Frame processing part 308 Hopping pattern memory | storage part 310 Control part 320 Wireless unit 400 Subordinate station 401 Antenna 402 Radio | wireless part 403 Frame processing part 408 Hopping pattern Storage unit 409 Transmission timing storage unit 410 Control unit 420 Wireless unit

Claims (11)

A wireless communication device that performs time division multiplex communication using a frequency hopping method, receives a control signal transmitted by one wireless communication device, and performs communication by synchronizing frequency hopping and TDMA,
Storage means for storing unique information for determining a hopping pattern for transmission for each device;
A wireless communication apparatus comprising: control means for controlling to start a wireless communication by determining a hopping pattern at the time of transmission based on the unique information stored in the storage means. A wireless communication device that performs time division multiplex communication using a frequency hopping method, receives a control signal transmitted by one wireless communication device, and performs communication by synchronizing frequency hopping and TDMA,
Storage means for storing unique information for determining for each device both a hopping pattern and a communication slot at the time of transmission;
A wireless communication apparatus comprising: control means for controlling to start a wireless communication by determining a combination of a hopping pattern and a communication slot at the time of transmission based on the unique information stored in the storage means. If communication using the selected hopping pattern or a combination of a hopping pattern and a communication slot is not possible, the next hopping pattern or hopping pattern based on the unique information stored in the storage means for newly storing the unique information 3. The wireless communication apparatus according to claim 1, wherein control is performed so as to determine a combination of communication slots and start wireless communication. 3. The wireless communication apparatus according to claim 1, wherein the unique information stored in the storage means is an extension number of the wireless communication apparatus. 3. The wireless communication apparatus according to claim 1, wherein the unique information stored in the storage means is identification information of the wireless communication apparatus. A wireless communication device that performs time division multiplex communication using a frequency hopping method, receives a control signal transmitted by one wireless communication device, and performs communication by synchronizing frequency hopping and TDMA,
A selection means for selecting a hopping pattern at the time of transmission based on a variable generated inside the wireless communication device;
A wireless communication apparatus comprising control means for controlling to start wireless communication based on the hopping pattern selected by the selection means. A wireless communication device that performs time division multiplex communication using a frequency hopping method, receives a control signal transmitted by one wireless communication device, and performs communication by synchronizing frequency hopping and TDMA,
Selection means for selecting a hopping pattern and a communication slot at the time of transmission based on a variable generated inside the wireless communication device;
A wireless communication apparatus comprising: control means for controlling to start wireless communication based on a combination of a hopping pattern and a communication slot selected by the selection means. If communication with the selected hopping pattern or combination of communication slots is not possible, a new hopping pattern or one or both of the next hopping pattern based on a variable generated inside the wireless communication device is newly added. 8. The wireless communication apparatus according to claim 7, wherein control is performed to determine and start wireless communication. 8. The wireless communication apparatus according to claim 6, wherein the selection unit selects a hopping pattern or a combination of a hopping pattern and a communication slot based on an elapsed time from when the power is turned on. 8. The wireless communication apparatus according to claim 6, wherein the selection unit selects a hopping pattern or a combination of a hopping pattern and a communication slot based on an elapsed time from the previous communication. It consists of a control station that performs time division multiplex communication using frequency hopping and a plurality of subordinate stations, and when a subordinate station transmits a request for establishing a radio link to the control station at an arbitrary timing. A wireless communication system in which an event for starting communication with a control station may occur,
Storage means for storing unique information for determining a different hopping pattern for each dependent station for each device;
When an event occurs in which a plurality of dependent stations simultaneously start communication with the control station, a hopping pattern at the time of transmission is determined based on the unique information stored in the storage means, and control is performed so as to start wireless communication. A wireless communication system.

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