JP5338888B2 - Communication apparatus, communication system, and communication method - Google Patents

Abstract

Provided is a communication system wherein first, second and third communication apparatuses perform time division multiplex communications in respective predetermined frame periods. A first communication apparatus comprises a control unit that causes a first control signal, which is to be repetitively transmitted to a second communication apparatus in a first frame period with reference to a predetermined frame position, and a second control signal, which is to be repetitively transmitted to a third communication apparatus in a second frame period with reference to the predetermined frame position, to be transmitted. The number of frames in the first frame period is a multiple of the number of frames in the second frame period. The control unit transmits, to the second communication apparatus, the first control signal in the first frame period at the N-th frame position from the predetermined frame position, and transmits, to the second communication apparatus, the second control signal in the second frame period at the M-th frame position from the predetermined frame position.

Description

The present invention relates to a wireless communication apparatus applicable to a wireless sensor.

  In recent years, for the purpose of effective use of frequency resources, a part of the frequency band of digital cordless telephones can be used not only for cordless telephones and wireless doorphones in homes and premises, but also for wireless communications such as various sensors and alarm systems. . This frequency band is approved based on the DECT (Digital Enhanced Cordless Communications) standard wireless communication system widely used as a communication system for digital cordless telephones around the world. The device can be used.

  The DECT method includes TDMA (Time Division Multiple Access) / TDD (Time Division) including 24 slots (12 slots for uplink and 12 slots for downlink) in one frame of 10 ms period. Duplex: Time Division Duplex) is adopted.

  FIG. 1 shows a DECT frame and slot configuration. As shown in FIG. 1, in DECT wireless communication, slots such as Slot: 1 and Slot: 2 are assigned to slots for performing wireless communication, and control of the slot position for communication is performed. The frame is composed of 24 slots from Slot: 1 to Slot: 24, and communication control is performed by assigning a frame number to each frame. One slot is assigned as a control channel, and 11 slot pairs are assigned as call channels. The control signal transmitted through the DECT control channel includes a synchronization signal for synchronizing bit synchronization and slot timing, a parent device ID for identifying the parent device, and slot synchronization for use in specifying a communication slot. This is an error detection code for determining whether there is an error in the received data and control information including the frame number used for synchronization, the frame number used for concealment control, the frame number used for concealment control, etc. Composed.

  In the DECT method, instead of sending information every frame, a unit (multiframe) with 16 frames as one cycle is defined, and control information is distributed to multiple frames by sending one type of message in one unit. And send it. The slave station, which is a dependent station, performs intermittent reception control that performs a reception operation in accordance with a control slot in which control information is transmitted once every 16 frames. Such TDMA wireless communication devices are used for battery-powered mobile communication and cordless telephones, and therefore, low power consumption is strongly demanded.

  For example, in Patent Document 1, the base station periodically transmits control data designating the transmission / reception period of the terminal station, and the terminal station is in the active mode at the time allocated to the terminal based on the data. A point of switching to the power saving mode is disclosed.

  In addition, it is required that a plurality of types of terminals such as various sensors and alarm devices can be connected to the base station. Patent Document 2 discloses that a terminal whose broadcast target data is not addressed can be grasped at the beginning of the data and immediately enters sleep, and battery consumption is reduced. Even in the sleep mode, the point of paging transmission is different for each group. Has been.

  Further, in Patent Document 3, when a base station calls a terminal station in an area, a signal for designating a corresponding terminal station in a call signal transmission section is transmitted, and a plurality of call signal transmission sections are prepared as necessary. The point which divides the paging signal transmission section which divides a terminal station into a group and uses it per group is disclosed.

JP 2004-104465 A Japanese Patent Laid-Open No. 2005-80287 JP 2003-259448 A

  In the conventional apparatus, there are a plurality of registered dependent stations, each of which has different functions, characteristics, operation modes, etc., and appropriate intermittent reception periods. Then, the control becomes complicated, and if the control station tries to send a message to all the dependent stations of the same type at the same time in accordance with the receivable timing of the same type of dependent station, the receiving operation period of intermittent reception becomes long in the dependent station. There were problems such as increased power consumption.

The present invention has been made in view of the above problems, and even when there are a plurality of registered dependent stations and appropriate intermittent reception periods are different, the dependent station of the dependent station can be controlled with relatively simple control. An object of the present invention is to provide a wireless communication apparatus that does not increase power consumption on the side.

The communication apparatus according to the present invention is different from a first other communication apparatus that performs time division multiplex communication in a first frame period that is a dependent station , and a different second that is an integral multiple of the first frame period that is a dependent station. A communication device that is a control station of the second other communication device that performs time division multiplex communication in a frame period of
Comprising a first control signal for the first other communication apparatus, and a second control signal to the second other communication apparatus, a control unit for transmitting,
The control unit transmits the first control signal at the first frame period from an Nth frame position from a predetermined frame position as a reference, and also from the Mth frame position different from N. The second control signal is transmitted in two frame periods .

  According to the present invention, the timing of intermittent reception can be freely changed for each registered dependent station or for each type of dependent station, and can be operated with an appropriate intermittent reception cycle for each dependent station by simple control. This can reduce the power consumption of the dependent stations.

The figure which shows the flame | frame and slot structure in a DECT system The figure which shows the radio | wireless communications system which concerns on embodiment of this invention The figure which shows the field structure of the radio signal transmitted / received by one slot used in the radio | wireless communications system The figure which shows the field structure of the control signal of the radio | wireless communications system The figure which shows the example of the control signal with which the main | base station of the same radio | wireless communications system is transmitted with one multi-frame. The figure which shows the field structure of the signal used by the connectionless communication of the radio | wireless communications system The figure which shows the field structure of the signal used in the case of the connection communication of the radio | wireless communications system The figure which shows the example of the signal transmitted when the main | base station of the same radio | wireless communications system sends notification by connectionless communication with a control signal The figure which shows the timing of the intermittent reception and message transmission of the electric power sensor subunit | mobile_unit of the same radio | wireless communications system Block diagram showing the configuration of the base unit of the wireless communication system Block diagram showing the configuration of the monitor slave unit of the wireless communication system The block diagram which shows the structure of the window sensor cordless handset of the same radio communication system The block diagram which shows the structure of the electric power sensor cordless handset of the same radio communication system Block diagram showing the configuration of the entrance cordless handset of the radio communication system The figure which shows the sequence of the subunit | mobile_unit registration operation | movement of the radio | wireless communications system The figure which shows the operation | movement for the monitor subunit | mobile_unit of the radio | wireless communications system to establish a synchronization with a main | base station The figure which shows the operation | movement in the case of performing communication by connection communications, such as a voice call and data communication between the main | base station and the subunit | mobile_unit of the same radio | wireless communications system The figure which shows the sequence in which the window sensor subunit | mobile_unit of the same radio | wireless communications system shifts from power-on to an idle state The figure which shows the example of operation | movement from the main | base station search operation | movement of the same radio | wireless communications system to establishing synchronization The figure which shows the example when control data cannot be received correctly in the operation | movement from the main | base station search operation | movement of the same radio | wireless communications system to establishment of a synchronization The figure which shows the example of operation | movement when the window sensor subunit | mobile_unit of the same radio | wireless communications system notifies the state of a window to a main | base station. The figure which shows the example of operation | movement until the window sensor subunit | mobile_unit of the same radio | wireless communications system detects that the state of the window changed, notifies a message to a main | base station, and a power supply is interrupted | blocked The figure which shows operation | movement when the window sensor subunit | mobile_unit of the same radio | wireless communications system changes the state of a window, and communication of the message to notify is not successful at once. The figure which shows the structure of the radio | wireless communications system which concerns on other embodiment of this invention. The figure which shows the 1st example of operation | movement in case a repeater relays the control signal transmitted from the main | base station of the same radio | wireless communications system. The figure which shows the 2nd example of operation | movement in case a repeater relays the control signal transmitted from the main | base station of the same radio | wireless communications system.

The first invention of the present application is a first communication apparatus that performs time division multiplex communication in a second frame period that is a dependent station with a first other communication device that performs time division multiplex communication in a first frame period that is a dependent station. A communication device that is a control station of two other communication devices,
Control for transmitting a first control signal in a first frame period to a first other communication apparatus and a second control signal in a second frame period to a second other communication apparatus And
An intermittent reception information storage unit that stores the first frame period and the second frame period;
The control unit performs first and second control so that a timing at which a control signal is transmitted to the first other communication apparatus and a timing at which a control signal is transmitted to the second other communication apparatus do not overlap. A communication apparatus is characterized by transmitting a signal .

  According to the first invention, the reference frame number and offset can be changed for each registered dependent station or for each dependent station type, and the dependent station type (for example, with a sensor, with a camera, etc.) It can be operated at an appropriate intermittent reception cycle depending on the characteristics and operation mode. In addition, the intermittent reception cycle can be freely selected according to the dependent station, and at the same time, the control station can broadcast the message to all the dependent stations of the same type at the same time in accordance with the receivable timing of the same dependent station. Power consumption can be reduced. When it is desired to suppress the battery consumption of a certain subordinate station, it is possible to set a longer sleep cycle by changing the reference frame number corresponding to only the slave unit with the sensor function according to a user instruction.

When the first communication device transmits a message addressed to a communication device that operates as a dependent station, including a relay wireless communication device that relays communication between the communication devices, the first intermittent reception information storage unit stores the message. Matches the reference frame number used as a reference for determining the frame number for sending a message addressed to the destination communication device and the offset value that defines the difference between the reference frame number and the frame number for sending the message. A message addressed to a communication device operating as a subordinate station using a frame with a frame number to be transmitted and a frame retroactive by the number of relay delay frames in the relay wireless communication device that relays the message transmitted from the first communication device. May be.

According to this , even when a relay radio communication device is interposed between the control station and the subordinate station, and the delay occurs due to the relay radio communication device, the subordinate station performs message reception from the control station while performing intermittent reception. Can be received.

(Embodiment 1)
A wireless communication system and a wireless communication apparatus according to Embodiment 1 of the present invention will be described with reference to the drawings. First, functions of the wireless communication system 10 shown in FIG. 2 will be described. The wireless communication system 10 shown in FIG. 2 has a function as a cordless telephone, a function as a door phone that calls a home person by pressing a button of a device attached outdoors, and performs voice communication while monitoring a visitor's video, Functions as a window management system that monitors the open / closed status of windows and sounds an alarm when a window opens, and functions as a power management system that manages the power usage status of electrical equipment ing. This wireless communication system 10 includes one master unit 20 that operates as a control station, three monitor slave units 30 (A to C) that operate as subordinate stations, and three window sensor slave units 40 (A to C). Each wireless communication device includes two power sensors 50 (A, B), one entrance handset 60 and the like. Base unit 20 is connected to telephone line 70.

  In FIG. 2, a base unit 20 is a fixed installation type wireless communication apparatus, which is operated by a commercial power supply of AC 100V, is connected to a telephone line 70, and operates as a cordless telephone base unit. The master unit 20 has a function of a door phone monitor master unit. The master unit 20 controls the display and storage of the open / closed state of the window notified from each window sensor and the setting / cancellation of the warning mode for the window sensor as a management device of the window management system. In addition, the master unit 20 tabulates a power usage amount of each electrical device to which the power sensor slave unit 50 sent from the power sensor slave unit 50 is attached as a management device of the power management system, creates a database, and the like.

  In FIG. 2, a monitor slave unit 30 (A to C) is a movable wireless communication device driven by a rechargeable battery, and has a function as a cordless phone slave unit and a door phone monitor slave unit. Further, the monitor slave unit 30 (A to C) operates as an operation device of the window management system, and functions for inputting / disabling a warning mode, displaying a window opening / closing state notified from the master unit 20, and an alarm notification function. Have Further, the monitor slave units 30 (A to C) operate as a monitor device of the power management system and have a function of displaying the power usage amount of each electrical device stored in the master unit 20.

  In FIG. 2, a window sensor slave unit 40 (A to C) is a battery-driven wireless communication device attached to a window, operates as a sensor device of the window sensor system, and notifies the master unit 20 of the open / closed state of the window. And a function to sound an alarm when a window is opened while the alarm mode is set.

  In FIG. 2, the power sensor 50 (A, B) is a wireless communication device that is attached between an outlet and an electric device and operates by a commercial power source of AC 100 V, and operates and is connected as a sensor device of a power management system. It has a function of notifying the parent device 20 of the power consumption of the electric device. In FIG. 2, an entrance slave unit 60 is a battery-driven wireless communication device that is fixedly installed outdoors near the entrance of a house such as an entrance, and has a function of a door phone entrance slave unit.

  Next, basic functions and operations of the wireless communication system shown in FIG. 2 will be described. The first function is a function as a cordless telephone. When an outside line incoming call is received from the telephone line 70, the base station 20 notifies the outside line incoming call with a radio signal, and the base unit 20 and the monitor handset 30 start an operation of notifying the outside line incoming call. When the user responds to an incoming call on the master unit 20, the master unit 20 enters an external line call state, and when the monitor slave unit 30 responds to an incoming call on the outside line, connection communication (to be described later) between the master unit 20 and the monitor slave unit 30 is performed. The monitor slave unit 30 that has been activated and responded to the voice call wireless link enters an external line call state.

  The second function is a window management system function. The window sensor slave unit 40 monitors the change in the state of the attached window, and notifies the master unit 20 of the window status each time the open / close state of the window changes. The open / close state of the window to which the machine 40 is attached is displayed. In addition, the wireless communication system 10 performs an operation of notifying the surroundings with an alarm sound when the window is opened. When the user sets the alert mode by operating the master unit 20 or the monitor slave unit 30, the fact that the alert mode is set is notified from the master unit 20 by a radio signal and notified to the window sensor slave unit 40. . When the window sensor slave unit 40 detects that the window has been opened during the alert mode, an alarm sound is generated and the master unit 20 is notified that the window has been opened. The master unit 20 sounds an alarm sound to notify that the window is open, and the monitor slave unit 30 also starts to sound an alarm sound.

  The third function is a power management system function. The power sensor slave unit notifies the power usage amount of the electrical equipment periodically attached to the master unit 20 at a timing designated by the master unit 20. The master unit 20 creates a database of the amount of power used that has been sent, and graphs and displays changes in the amount of power used. Also, the power usage can be displayed on the monitor slave unit 30. When displaying the power usage on the monitor slave unit 30, the wireless communication with the master unit 20 is started and the database of the power usage of the master unit is referred to. Display.

  The fourth function is a door phone function. When a call operation is performed on the front door device 60, a call from the front door device 60 is notified to the parent device 20. The master unit 20 notifies the occurrence of a call from the entrance slave unit 20, and the master unit 20 and the monitor slave unit 30 start a call occurrence from the entrance slave unit 20, that is, a notification of a visitor. When the wireless resource is open, the master unit activates wireless communication for data communication with the entrance slave unit 20, captures an image taken by the entrance slave unit 60, displays the image on the master unit 20, and The image data is transmitted to the monitor slave unit 30, and the monitor slave unit 30 displays an image photographed by the entrance slave unit 60. When the user responds to the call from the entrance slave unit 60 at the master unit 20, a wireless link for voice communication of connection communication, which will be described later, is activated between the master unit 20 and the entrance slave unit 60, and the master unit 20 and the entrance slave unit. 60 enters a call state. When the monitor slave unit 30 responds, a wireless link for voice communication of connection communication, which will be described later, is activated between the master unit 20 and the entrance slave unit 60 and between the master unit 20 and the monitor slave unit 30, respectively. The monitor slave unit 30 and the entrance slave unit 60 that responded via the communication state are in a call state.

  Further, as one of the door phone functions, by operating the master unit 20 or the monitor slave unit 30, the entrance slave unit 60 is called to activate data communication wireless communication and voice wireless communication. You can display the image taken with, and put it in a talking state.

  Next, a wireless communication method of the wireless communication system 10 shown in FIG. 2 will be described. A radio communication system 10 shown in FIG. 2 performs DECT time division multiplex radio communication. The master unit 20 is a control station, the monitor slave unit 30 (A to C), the window sensor slave unit 40 (A to C), the power sensor slave unit 50 (A, B), and the entrance slave unit 60 (A, B) are subordinate. Operates as a station. In addition, as shown in FIG. 1, the DECT time division multiplex communication is a TDMA / configuration configured by including 24 slots (12 slots for uplink and 12 slots for downlink) in one frame of 10 ms cycle. TDD communication. Also, as shown in FIG. 1, in order to control the time division multiplex communication between the control station and the subordinate station, a number called a frame number incremented by one for each frame is given to a frame of 10 ms period, Numbers called slot numbers 1 to 24 are assigned to 24 slots in the frame. In the following description, the frame of frame number k shown in the figure is described as frame k, and the slot of slot number N is described as Slot: N.

  Next, a field configuration of a radio signal used when the radio communication system 10 performs radio communication will be described. FIG. 3 shows a field configuration of a radio signal transmitted and received in one slot used in the radio communication system shown in FIG. As shown in FIG. 3, a radio signal transmitted and received in one slot is composed of three fields: a synchronization field, a first field, and a second field. The synchronization field is a field for a synchronization signal including a preamble for synchronizing bit timing and a sync word for detecting the start position of the subsequent first field.

  The first field includes a message type indicating the message type of the first field, format identification information indicating the data format of the second field, control data 1 composed of the first field message, and data received in the first field. This is a field for the error detection code 1 for receiving error detection.

  The second field is a field used in a format according to the application, and is a field for control data for communication control, voice data for voice communication, image data for image communication, and a message for message communication. is there.

  Next, the types of radio signals used when the radio communication system 10 performs radio communication will be described. Radio signals used when the radio communication system 10 performs radio communication are classified into control signals called control signals and communication signals. The control signal is a signal that is constantly transmitted using a specific slot every 10 msec from the parent device 20 that operates as a control station. Base unit 20 transmits base unit identification information, a frame number, a slot number, and the like by a control signal, and a dependent station (various slave units) receives the control signal to identify the registered base unit, and Establish slot synchronization.

  The control signal is used as a signal for simultaneously notifying an event to a plurality of dependent stations such as an incoming call from a telephone line or a call from an entrance terminal or calling a specific dependent station. FIG. 4 shows the field structure of the control signal. As shown in FIG. 4, the control signal is composed of a synchronization field composed of a synchronization signal, a first field composed of control data 1 and an error detection code 1, and a second field as described in FIG. The second field includes an error detection code 2 for detecting a reception error of control data 2 and control data 2, an error detection code 3 for detecting a reception error of control data 3 and control data 3, control data 4 and control. An error detection code 4 for detecting a reception error of data 4, a control data 5 field, and an error detection code 5 field for detecting a reception error of control data 5 are configured.

  Next, a message transmitted in the first field of the control signal will be described. The base unit 20 of the wireless communication system 10 includes an NT message for notifying a base unit ID as base unit identification information, a QT message for notifying system information such as a frame number, base unit function, communication frequency, standby frequency, and telephone. PT that notifies paging-related information such as call information for notification of incoming calls from the line and calls from the entrance unit, caller's phone number information for caller ID notification, alarm activation used in the window management system, etc. The message is transmitted on the first field of the control signal.

  These NT message, QT message, and PT message are transmitted in a fixed order with 16 consecutive frames starting from a frame whose frame number is an integral multiple of 16 as one section (hereinafter, frame numbers are referred to as frame numbers). A group of 16 consecutive frames starting from a frame that is an integral multiple of 16 is called a multiframe). That is, base unit 20 of radio communication system 10 transmits a PT message in the first (0th), second, fourth, sixth, tenth, and twelfth frames in one multiframe, and the eighth A QT message is transmitted in a frame, and an NT message is transmitted in the remaining frames.

  In the 0th, 2nd, 4th, 6th, 10th, and 12th frames, if there is no PT message to be transmitted, an NT message is transmitted. In addition, the call information for notifying the incoming call from the telephone line and the call from the entrance unit, and the PT message that can be transmitted in only one frame such as the alarm activation used in the window management system are transmitted in the 0th frame. In addition, a PT message that is divided into a plurality of frames and transmitted, such as telephone number information of a caller number for notification of a caller ID, is transmitted by a divided message with the 0th frame as the head.

  Next, a message transmitted in the second field of the control signal will be described. In the second field, for the dependent station that requires high-speed synchronization, information on the frame and slot synchronization and information on the frequency and slot for connection communication described later are included in the information transmitted in the first field. And transmitted as two types of messages, control channel information and free channel information. The base unit 20 of the radio communication system 10 transmits control channel information in the control data 2 and control data 4 fields and transmits free channel information in the control data 3 and control data 5 fields in frames with even frame numbers. To do. In a frame with an odd frame number, empty channel information is transmitted in the control data 2 and control data 4 fields, and control channel information is transmitted in the control data 3 and control data 5 fields.

  Next, a control signal transmitted in one multiframe will be described with reference to FIG. 5 is transmitted in one multiframe when the base unit 20 of the wireless communication system 10 shown in FIG. 2 detects an incoming call from the telephone line 70 and notifies the incoming call from the telephone line by a PT message. An example of a control signal is shown. FIG. 5 shows the field structure of the control signal at the top. Further below, a control signal transmitted in the first (0th) frame of a 16 × N + 0 multiframe whose frame number is a multiple of 16, and further transmitted in the last (15th) frame of the multiframe. The control signal of 16 frames up to the signal is shown.

  In FIG. 5, the message type indicating that the PT message is transmitted by the first field message is “PT”, the message type indicating that the NT message is transmitted by the first field message is “NT”, and the QT is indicated by the first field message. A message type indicating that a message is to be transmitted is described as “QT”.

  In addition, the format identification information indicating that the message having the field configuration shown in FIG. 4 is transmitted in the second field is described as “control data 2345”. Further, the data of the first field message indicating the PT message for notifying the incoming from the telephone line is described as “calling information (telephone incoming call)”. Further, the data of the first field message indicating the NT message for notifying the identification code of the parent device is described as “parent device identification”. Further, the data of the first field message indicating the QT message notifying the slot number in which the control signal is transmitted is described as “slot number”.

  Next, communication signals will be described. Communication signals are classified into signals used for connectionless communication and signals used for connection communication. The connectionless communication is a signal that is transmitted with one communication content stored in one slot, and is a complete one-way communication. Since this connectionless communication performs communication without negotiation, communication is performed using a specific frequency in a specific slot.

  That is, the transmission of the signal by connectionless communication addressed to the dependent station from the master unit 20 operating as the control station is performed using the same frequency as the control signal in the slot for transmitting the control signal described above. Further, signal transmission from the dependent station by connectionless communication addressed to base unit 20 is performed using the same frequency as the control signal using a slot 12 slots away from the slot of the control signal. In addition, since the connectionless communication signal from the base unit 20 is transmitted using the control signal frequency in the control signal slot, it also serves as the control signal described above. The field transmits control data based on multiframe control for control signals.

  Next, a field configuration of signals used in connectionless communication will be described with reference to FIG. FIG. 6 is a diagram showing a field configuration of signals used in connectionless communication of the wireless communication system shown in FIG. As shown in FIG. 6, the signal used in connectionless communication includes a synchronization field composed of a synchronization signal, a first field composed of control data 1 and an error detection code 1, as described in FIG. It consists of a second field that follows. This second field includes an error detection code 2 for detecting a reception error of CLMS1 and CLMS1, an error detection code 3 for detecting a reception error of CLMS2 and CLMS2, and an error for detecting a reception error of CLMS3 and CLMS3. This is composed of detection code 4, CLMS4, and a field of error detection code 5 for detecting a reception error of CLMS4.

  As described above, the connectionless communication signal also has a feature as a control signal, and the first field is used to transmit an NT message for notifying a parent device ID as parent device identification information as a transmission destination or a transmission source. Is done. The second field is used to transmit the identification code of the subordinate station that is the transmission destination or transmission source and the main body of the message to be transmitted to the transmission destination. In this second field, the identification code of the dependent station and the data string of the message body are divided into the above-mentioned CLMS1, CLMS2, CLM3, and CLMS4 fields and transmitted.

  Next, connection communication signals for communication will be described. The connection communication is communication in which the base unit 20 and the dependent station transmit and receive bidirectional signals using slots that are 12 slots apart. As shown in FIG. 1, the base unit 20 operating as a control station uses Slot: 1 to Slot: 12 for transmission, and the subordinate station uses Slot: 13 to Slot: 24 for transmission. Connection communication is started by sending a wireless link establishment request from a dependent station. The subordinate station selects one slot from twelve slots from slot: 13 to slot: 24, and uses the frequency matched to the standby frequency of the master unit 20 to request connection establishment of a radio link. Send.

  On the other hand, when accepting activation of connection communication, base unit 20 sends a radio link establishment response using a frequency equal to the reception frequency of the radio link establishment request in a slot 12 slots away from the slot that has received the radio link establishment request. The two-way wireless communication between the master unit 20 and the subordinate station is started. It activates the data link layer for transmission and reception of control messages for call connection, exchanges control messages for call connection (hereinafter referred to as CC messages), and provides services such as voice communication and data communication. Be started. At the end of the service, the CC message is exchanged to notify the end of the service, the data link layer is released, and finally a radio link release message is sent to notify the stop of the radio signal from both sides. Stop signal transmission. Note that the frequency at which the dependent station transmits a radio link establishment request, that is, the standby frequency of the parent device 20 is periodically notified from the parent device 20 by the above-described control signal, and is stored in the RAM or EEPROM of the dependent station.

  Next, the field configuration of signals used in connection communication will be described with reference to FIG. FIG. 7 is a diagram illustrating a field configuration of a signal used in the case of connection communication of the wireless communication system illustrated in FIG. As shown in FIG. 7, the signals used in connection communication include a synchronization field composed of a synchronization signal, a first field composed of control data 1 and an error detection code 1, and a second field as described in FIG. It is composed of The second field is composed of an audio data / image data field and an error detection code 6 for detecting a reception error in the second field in accordance with a service provided by connection communication.

  In connection communication, the first field is a field of a control message for starting / stopping a service such as a radio link establishment request, radio link establishment confirmation, data link layer activation / release, CC message, etc. for activating connection communication Used as. These control messages are transmitted and received as the first field message of the control data 1 of the first field. Further, when connection communication is performed only for the purpose of exchanging application layer messages between the base unit 20 and the subordinate station, the application layer message is transmitted and received as a first field message using the control data 1 field of the first field. To do.

  Next, frame and slot synchronization operations for time division multiplex communication in the wireless system 10 will be described. The synchronization of frames and slots for time division multiplex communication in the wireless system 10 is based on the control signal transmitted from the parent device 20 operating as the control station, and the dependent station in the wireless communication system 10. This is done by matching the timing of the frame and the slot. Base unit 20 selects an arbitrary slot from 12 slots from Slot: 1 to Slot: 12, and transmits a control signal every 10 msec using the selected slot. In response to this control signal, base unit 20 transmits the frame number and slot number that are transmitting the control signal. The slave station receives these, records the frame number and slot number of the control signal, and synchronizes the timing of the frame and slot transmitted / received by the slave station itself with the master station 20, thereby synchronizing the master station 20 and the slave station. Established.

  Next, intermittent reception control in the wireless system 10 will be described. Intermittent reception refers to the operation of receiving control signals every frame for the purpose of power saving during standby in a slave station that maintains frame and slot synchronization while receiving control signals transmitted from the base unit 10. This is a reception method in which the data is received after being thinned out.

  A message by connectionless communication from the base unit 20 to the subordinate station is transmitted in the same slot as the control signal. In the control signal, a message addressed to a subordinate station such as an incoming call from a telephone line or a call from an entrance terminal is transmitted. As described above, there are a plurality of different types of slave units operating as subordinate stations, for example, monitor slave unit 30, window sensor slave unit 40, power sensor 50, and entrance slave unit 60 in the example of FIG. A message notifying that an incoming call has been received from the telephone line, a message calling by a visitor at the entrance slave unit, and a message indicating an alarm notification from the window sensor slave unit need to be transmitted to the monitor slave unit 30 to other subordinate stations. There is no need to tell. In addition, when there is a visitor, a message of a call start instruction issued by operating the monitor slave unit 30 is transmitted only to the entrance slave unit 60, and it is not necessary to transmit it to other subordinate stations. These messages are transmitted from the base unit 10 at a timing based on a specific rule, and each dependent station performs intermittent reception that starts reception in accordance with the timing at which the message addressed to itself is transmitted.

  Hereinafter, the intermittent reception control of each type of dependent station of the wireless system 10 will be described in detail. First, the intermittent reception control of the monitor slave unit 30 will be described. The monitor slave unit 30 receives the PT message transmitted from the master unit 20 and receives the incoming message from the telephone line 70, the call from the entrance slave unit 60, and the alarm notification message of the window management system. Intermittent reception is performed according to the transmission timing. That is, the monitor slave unit 30 operates so as to receive only the slot that transmits the control signal of the first frame of the multi-frame whose frame number is a multiple of 16 in the standby idle state.

  Next, the intermittent reception control of the window sensor slave unit 40 will be described. When the alert mode of the window management system is set, the window sensor slave unit 40 sounds a notification sound when the window is opened. The base unit 20 uses a connectionless communication to send a message addressed to the window sensor slave unit that notifies the setting state of the warning mode (hereinafter, this message is called a warning mode state notification) to a multiple of 2048. It is transmitted every frame added with.

  FIG. 8 is a diagram illustrating an example of a signal transmitted when the base unit 20 of the wireless communication system 10 illustrated in FIG. 2 sends a warning mode state notification through connectionless communication together with a control signal. In FIG. 8, the field configuration of the control signal is shown at the top, and the field configuration of the signal used when connectionless is shown at the second level. In the second and subsequent stages in FIG. 8, examples of 16-frame signals transmitted in one multiframe including a frame for transmitting a warning mode state notification message are shown in order from the frame from the top of the multiframe. In the example of FIG. 8, the message transmitted in a frame other than the message for notifying the setting state of the alert mode is the same as that in the case of FIG.

  FIG. 8 shows an example in which a message for notifying the setting state of the alert mode is sent when the frame number is a frame of 2048 × N + 1. As shown in FIG. 8, in the first field of this frame, as in the case of FIG. 5, an NT message for notifying the identification information of the parent device is transmitted, and in the second field, a warning mode state notification is transmitted. In FIG. 8, the data of the second field message of CLMS1, CLMS2, CLMS3, and CLMS4 for notifying the message for notifying the setting state of the warning mode is “warning mode state notification 1”, “warning mode state notification 2”, “warning”. Mode state notification 3 ”and“ warning mode state notification 4 ”are described. This indicates that the alert mode state notification is divided into four fields CLMS1, CLMS2, CLMS3, and CLMS4. In the area of the control data 1 in the field configuration of the connectionless communication shown in FIG. 6, the message type, format identification information, and first field message are sent as shown in the second row of FIG. In the example of FIG. 8, the format identification information indicating that a message message for notifying the setting state of the alert mode is transmitted in the second field is described as “CLMS1234”. In this way, by making the frame for transmitting the alert mode state notification by connectionless communication a frame obtained by adding 1 to an integer multiple of 2048 which is a multiple of 16, the first field is the same as that in the multi-frame control described above. According to the transmission rules of PT, NT, and QT, it is possible to transmit an NT message using the first field and to send a warning mode state notification using the second field.

  Next, the intermittent reception control of the power sensor slave unit 50 will be described. The power sensor slave unit 50 uses connectionless communication to notify the master unit 20 of the power usage of the attached electrical device at a cycle of 30 seconds (30000 msec). When the power sensor 50 is registered in the parent device 20, the parent device 20 notifies a parameter that specifies the timing of intermittent reception of the power sensor 50. When a plurality of power sensors 50 are registered (power sensor A50, power sensor B50,...), Base unit 20 notifies a parameter for designating different intermittent reception timings for each power sensor (hereinafter referred to as intermittent reception). Parameters that specify timing are called offsets). Then, the power sensor 50 performs intermittent reception at a designated timing, and notifies the parent device 20 of the power usage amount using a connectionless communication in a slot 12 slots after the slot that has performed the intermittent reception.

  FIG. 9 shows the timing of intermittent reception and message transmission of the power sensor slave unit 50. In FIG. 9, the power sensor 50 starts reception at a timing when the frame number is an integral multiple of 3000 (1 is added) (the frame number is 3001, the frame number is 3002...), And the reception of the control signal slot is continued. In the connectionless communication transmission slot, which is 12 slots away from the control signal reception slot, reception for carrier sense is performed over a time width of 2 frames, and the power usage of the electrical device is notified by connectionless communication. The operation of transmitting a message and stopping transmission / reception is shown.

  FIG. 9 illustrates an example in which the power sensor A50 operates with an offset of “1”. The power sensor A50 starts receiving a slot in which the parent device 20 transmits a control signal in a frame 3001, and a frame 3003 Until the control signal is received. Then, the power sensor A50 performs reception for carrier sense that performs interference wave detection at a slot 12 slots away from the slot that received the control signals of the frames 3001 and 3002, and the slot that received the control signal in the frame 3003. A message notifying the amount of electric power used by the electric device is transmitted using a slot that is 12 slots away. After that, the power sensor A50 stops transmission / reception from the frame 3004, and similarly starts receiving the slot from which the base unit 20 transmits a control signal from the frame 6001.

  The power sensor A50 starts receiving from the frame 6001. The carrier sensor detects the interference wave at a slot 12 slots away from the slot that received the control signals of the frames 6001 and 6002 while continuing to receive the control signal until the frame 6003. Is received, and a message notifying the power usage of the electrical device is transmitted in a slot 12 slots away from the slot that received the control signal in the frame 6003. The power sensor A50 stops transmission / reception from the next frame 6004, and thereafter repeats the operation at a cycle of 30 seconds (a cycle of 3000 frames).

  FIG. 9 shows an example in which the power sensor B50 operates with an offset of “2”, and the power sensor B starts receiving a slot in which the parent device 20 transmits a control signal in a frame 3002. Thereafter, similarly to the description of the power sensor A50, the operation of performing the carrier sense of 2 frames while receiving the control signal of the parent device 20 and transmitting the message for notifying the power usage amount of the electric device is performed in a cycle of 30 seconds (3000). The operation is repeated at a frame period).

  Next, the intermittent reception control of the front door 60 will be described. When the doorphone monitor mode is activated by an operation from the master unit 20 or the monitor slave unit 30, a message for starting the doorphone monitor mode (hereinafter referred to as a monitor activation message) is transmitted from the master unit 20 using connectionless communication. The slave unit 60 is notified. In accordance with the monitor activation message, the entrance slave unit 60 starts imaging, image transmission is started from the entrance slave unit 60, and an image captured by the entrance slave unit 60 is displayed on the master unit 20 or the monitor slave unit 30.

  The monitor activation message transmitted by the parent device 20 is transmitted from the parent device 20 in a frame obtained by adding 3 to a multiple of 128 when the entrance child device 60 is operating in the normal mode. Further, when the front door device 60 is operating in the power save mode, the frame number is transmitted from the parent device 20 in a frame obtained by adding 3 to a multiple of 256. The entrance unit 60 performs intermittent reception according to the transmission timing of the monitor activation message in preparation for the arrival of the monitor activation message. That is, the front door 60 receives a slot in which a control signal of a frame obtained by adding 3 to a multiple of 128 in the normal mode is transmitted, and the frame number is a multiple of 256 in the power save mode. It operates so as to receive the slot to which the control signal of the frame added with 3 is transmitted. Note that switching between the normal mode and the power save mode is activated by an operation from the master unit 20 or the monitor slave unit 30, and the command for switching to the mode selected by the user is the master unit 20 as in the monitor activation message. From the connectionless communication, the entrance slave unit 60 is notified.

  Next, frame number control will be described. The frame number is incremented every frame of 10 msec. When the frame number is incremented by 1, it is updated at the same timing in all the radio communication devices of the radio system 10. This frame number is incremented by 1 for each frame of 0 to 10 msec from the time when the base unit 20 operating as the control station of the wireless system 10 starts to operate and starts transmitting the control signal. Then, one round is made with the common multiple of the intermittent period in which the dependent station operates, and 0 is cleared.

  In the wireless system 1 of the present embodiment, there are four types of slave stations, the monitor slave unit 30, the window sensor slave unit 40, the power sensor slave unit 50, and the entrance slave unit 60, and the intermittent reception cycle of the monitor slave unit 30 is The intermittent reception cycle of the window sensor slave unit 40 is 20480 msec, the intermittent reception cycle of the power sensor slave unit 50 is 30000 msec, and the intermittent reception cycle of the entrance slave unit 60 is 1280 msec or 2560 msec. For this reason, the base unit 20 of the wireless system 10 controls the frame number so that the frame number makes a round at an integer multiple of 7680000 msec, which is the least common multiple of the intermittent reception cycle of each slave unit. In this case, the frame number starting from 0 is rounded up to 767999.

  In this way, when the frame number makes a round from 0 to 767999, the monitor slave unit 30 with the intermittent reception cycle: 160 msec is the 0th frame of the multiframe starting from the frame whose frame number is an integral multiple of 16. Receive operation with frame. That is, the monitor slave unit 30 performs the reception operation on the 0th frame of the multiframe starting from the frame 16 and the 0th frame of the multiframe starting from the frame 32, and thereafter performs the reception operation at the same cycle. . Immediately before the frame number goes around, a frame 767984, which is 47999 times the frame number 16, is received. At the next reception timing, the frame 768000 after 16 frames, that is, the frame 0 is received. As described above, the monitor slave unit 30 continues reception every 16 frames before and after the frame number makes a round, so that the frame whose frame number is an integer multiple of 16 starts after the frame number makes a round. The 0th frame of the multiframe can be received.

  Similarly, the window sensor slave unit 40 having an intermittent reception cycle of 20480 msec performs a reception operation with a frame obtained by adding 1 to a multiple of 2048. That is, the window sensor slave unit 40 performs a reception operation with a frame with a frame number of 2049 and a frame with a frame number of 4097, and thereafter performs a reception operation with the same cycle. Immediately before the frame number goes around, the window sensor slave unit 40 performs a reception operation at a frame 762953 obtained by adding 1 to 765952, which is 374 times the frame number. Then, at the timing of the next reception, the reception operation is performed with the frame after 2048 frames, that is, with one frame instead of 768001. In this way, the window sensor slave unit 40 continues to receive every 2048 frames before and after the frame number makes a round, so that after the frame number makes a round, the frame number is obtained by adding 1 to a multiple of 2048. Can be received.

  Further, the power sensor slave unit A50 having an intermittent reception cycle of 30000 msec that operates with an offset of “1” performs a reception operation with a frame number obtained by adding 1 to a multiple of 3000. Immediately before the frame number makes a round, the receiving operation is performed with a frame 765001 obtained by adding 1 to 765000 which is 255 times the frame number 3000. Then, at the next reception timing, the frame after 3000 frames, that is, one round, so that the reception operation is performed at frame 1 instead of 768001, and the reception of every 3000 frames is continued before and after the frame number is rounded. Thus, even after the frame number has made a round, it is possible to receive a frame obtained by adding 1 to a multiple of the frame number 3000.

  In addition, the power sensor slave unit 50B having an intermittent reception cycle of 30000 msec that operates with an offset of “2” performs a reception operation on a frame obtained by adding 2 to a multiple of a frame number of 3000, and immediately before the frame number has made a round, the frame number Is received at a frame 765002 obtained by adding 2 to 765000, which is 255 times 255. Then, at the next reception timing, the frame after 3000 frames, that is, one round is taken, so the reception operation is performed at frame 2 instead of 768002, and the reception of every 3000 frames is continued before and after the frame number goes around. Thus, even after the frame number has made a round, it is possible to receive a frame in which the frame number is a multiple of 3000 and 2 is added.

  In addition, the entrance slave unit having an intermittent reception cycle of 1280 msec that operates in the normal mode performs a reception operation with a frame number that is a multiple of 128 plus 3 and immediately before the frame number goes around, the frame number is 5999. The receiving operation is performed with a frame 767875 which is obtained by adding 3 to the double 7677872. At the next reception timing, the frame after 128 frames, that is, since it makes a round, the reception operation is performed at frame 3 instead of 768003, and the reception of every 128 frames is continued before and after the frame number makes a round. Thus, even after the frame number has made a round, it is possible to receive a frame obtained by adding 3 to a multiple of 128.

  Similarly, in the intermittent reception of the entrance slave unit operating in the power save mode, a frame number obtained by adding 3 to a multiple of 256 is received, and the frame number is 2999 times that of 256 immediately before the frame number goes around. Frame 767744 plus 3 is received, and at the next intermittent reception timing, the receiving operation is performed at frame 3 instead of 768003 because the frame is 256 frames after that, that is, one round. By continuing to receive every 256 frames before and after the frame number makes a round, even after the frame number makes a round, it is possible to receive a frame in which the frame number is a multiple of 256 plus 3.

  Next, a description will be given of the control when the frame number is cycled with a numerical value other than the common multiple of the intermittent period in which the dependent station operates. When the frame number makes a round with a numerical value other than the common multiple of the intermittent period, the dependent station whose intermittent period is not a divisor of the frame number period corrects the intermittent reception period when the frame number makes a round, and is the same as the previous time. Receive by frame number. For example, when the base unit 20 of the wireless communication system 10 performs control so that the frame number makes a round of 2 to the 28th power (2684435456), the intermittent reception cycle of the power sensor slave unit is corrected as follows.

  That is, the power sensor slave unit A50 that operates with an offset of “1” performs a reception operation with a frame obtained by adding 1 to a multiple of the frame number 3000. After this power sensor slave unit A50 receives data in 268344001 frames obtained by adding 1 to 89478 times 3000, the frame number goes through until the normal intermittent reception timing after 3000 frames unless correction is made. However, it operates to temporarily change the reception timing so as to receive frame 1 after 1456 frames, and operates to resume intermittent reception every 3000 frames.

  As another control method, the power sensor slave unit A50 performs intermittent reception while monitoring the frame number notified by the control signal, and performs intermittent reception in 268344001 frames obtained by adding 1 to 89478 times 3000. After that, intermittent reception is continued every 3000 frames, and in the next reception, if it is detected that the frame number is not a frame obtained by adding 1 to a multiple of 3000, the immediately following frame number is a multiple of 3000 based on the received frame number. It is also possible to perform control so that a frame obtained by adding 1 to the frame, that is, the frame 3001 is received.

  Next, the master unit 20 will be described with reference to FIG. FIG. 10 is a block diagram showing a configuration of base unit 20 of wireless system 10 shown in FIG. As shown in FIG. 10, base unit 20 has radio section 201 that performs DECT wireless communication, transmits transmission data such as control data and voice data in accordance with the timing for TDMA communication, and receives TDMA communication from received data. A frame processing unit 202 that extracts data in accordance with timing, and an audio processing unit 203 that converts received audio data into an analog audio signal and converts the analog audio signal into digital audio data for transmission.

  Furthermore, the base unit 20 sets the first control data multiplexing unit 210 that manages the transmission order of control data to be transmitted in the first control data area of the control signal, and the transmission order of control data to be transmitted in the subsequent control data area. A second control data multiplex unit 211 to be managed is provided.

  Furthermore, the master unit 20 includes a ROM 220 that stores a program for controlling the master unit 20 and a RAM 221 for executing the program. In addition, the content of the main unit 20 does not disappear even when the power is turned off. The EEPROM 222 whose contents can be rewritten by a specific method, the display unit 223 for displaying the operation state and the like, and the operation unit 224 for inputting an operation instruction to the main unit 20. A slave unit intermittent reception information storage unit 225 for storing information related to intermittent reception control such as the intermittent reception cycle and offset of the registered slave unit, and a control unit 230 for controlling the entire master unit 20. The main unit 20 is driven by a commercial power supply of AC 100V, but functional blocks for supplying power composed of a rectifier circuit and a voltage conversion circuit are not shown and description thereof is omitted.

  Next, the monitor slave unit 30 will be described with reference to FIG. The monitor slave unit 30 is a wireless unit 301 that performs DECT wireless communication, transmits transmission data such as control data and voice data in accordance with the timing for TDMA communication, and transmits data from the received data to the timing of TDMA communication. The extracted frame processing unit 302 includes an audio processing unit 303 that converts received audio data into an analog audio signal and converts the analog audio signal into digital audio data for transmission.

  Furthermore, the monitor slave unit 30 includes a control data multiplexing unit 310 that manages the transmission order of control data transmitted in the first control data area of the control signal, a ROM 320 that contains a control program, and a program for executing the program. A RAM 321 is provided. Further, the contents of the monitor slave unit 30 are not erased even when the power is turned off. The EEPROM 322 can be rewritten by a specific method, the open / closed state of the window, the power consumption of each electric device stored in the master unit 20, and the entrance slave unit 60. A display unit 323 for displaying an image taken by the user, an operation unit 324 for inputting an operation instruction, and a control unit 330 for controlling the monitor slave unit 30 as a whole. The monitor slave unit 30 is driven by a rechargeable battery, but the description of the battery and functional blocks for supplying power from the battery is omitted.

  Next, a window sensor slave unit 40 that detects opening / closing of a window and transmits a signal to the master unit 20 will be described with reference to FIG. The window sensor slave unit 40 includes a wireless unit 401 that performs DECT wireless communication, and the window sensor slave unit 40 matches transmission data such as control data and sensor detection information in accordance with the timing for TDMA communication. A frame processing unit 402 is provided that extracts data in accordance with the timing of TDMA communication from the received data transmitted to the parent device 20 and received from the parent device 20.

  Further, the window sensor slave unit 40 includes a first control data multiplexing unit 410 that manages the transmission order of control data transmitted in the first control data area of the control signal, and the transmission order of control data transmitted in the subsequent control data area. Is provided with a second control data multiplex unit 411.

  Further, the window sensor slave unit 40 has a ROM 420 containing a control program, a RAM 421 for executing the program, an EEPROM 422 that can be rewritten in a specific manner even if the power is turned off, and a warning mode is set. When the window is opened in a state of being in, a notification unit 423 is provided for outputting a notification sound informing that the window has been opened. In addition, the second clock generation unit 424 generates a clock necessary for wireless communication to the wireless unit 401 and a clock necessary for the operation of the window sensor slave unit 40. The window sensor operates with the clock generated by the second clock generation unit 424. A control unit 430 that controls the entire slave unit 40 is provided.

  The window sensor slave unit 40 includes a switch 440 for turning on / off the power supply to the communication block 400, a power control unit 441 for generating a power control switching signal, and a timer unit for generating a power on signal after a set time has elapsed. 442, a sensor unit 443 that detects opening / closing of a window and generates a power-on signal, a power supply unit 444 that supplies power to each unit of the window sensor slave unit 40 by battery power, a state storage unit 445 that can be operated by a battery at all times, and a timer A first clock generation unit 446 that generates a clock for driving the unit 442;

  The wireless unit 401, the frame processing unit 402, the first control data multiplexing unit 410, the second control data multiplexing unit 411, the ROM 420, the RAM 421, the EEPROM 422, the notification unit 423, and the second clock generation unit of the window sensor slave unit 40. A block composed of 424 and the control unit 330 is referred to as a communication block 400. Power is supplied to each part of the communication block 400 via the switch 440, and the supply of power is cut off when the switch 440 is off.

  Next, the power sensor slave unit 50 will be described with reference to FIG. The power sensor slave unit 50 includes a wireless unit 501 that performs DECT wireless communication, and transmits transmission data such as control data and power usage in accordance with the timing for TDMA communication. A frame processing unit 502 that extracts data is provided.

  Furthermore, the power sensor slave unit 50 executes a control data multiplexing unit 510 that manages the transmission order of control data to be transmitted in the first control data area of the control signal, a ROM 520 that contains a control program, and a program. The RAM 521 is provided. Further, the power sensor slave unit 50 includes an EEPROM 522 whose contents are not erased even when the power is turned off and whose contents can be rewritten by a specific method, and a control unit 550 that controls the power sensor slave unit 50 as a whole. The power sensor slave unit 50 is driven by a commercial power supply of AC 100V. However, functional blocks for supplying power composed of a rectifier circuit and a voltage conversion circuit are not shown and description thereof is omitted.

  Next, an entrance slave device 60 that operates as a door phone entrance slave device will be described with reference to FIG. The entrance unit 60 includes a wireless unit 601 that performs DECT wireless communication, and the entrance unit 60 matches transmission data such as control data, audio data, and image data in accordance with the timing for TDMA communication. A frame processing unit 602 that extracts data from the received data received from the master unit 20 in accordance with the timing of TDMA communication, converts the received audio data into an analog audio signal, and transmits the analog audio signal. An audio processing unit 203 for converting into trusted digital audio data is provided.

  Further, the front door 60 has a first control data multiplex unit 610 that manages the transmission order of control data transmitted in the first control data area of the control signal, and the transmission order of control data transmitted in the subsequent control data area. A second control data multiplex unit 611 for management is provided.

  Further, the entrance unit 60 includes a ROM 620 containing a control program, a RAM 621 for executing the program, an EEPROM 622 whose contents are not erased even when the power is turned off and the contents can be rewritten by a specific method, and a visitor image. A camera 623 is provided. In addition, the second clock generation unit 624 that generates a clock necessary for wireless communication to the wireless unit 601 and a clock necessary for the operation of the front door 60, an intermittent reception information storage unit 625 that stores a period of intermittent reception, and a second clock A control unit 630 is provided that operates with the clock generated by the generation unit 624 and controls the entire entrance slave device 60.

  The entrance unit 60 also includes a switch 640 for turning on / off the power supply to the communication block 600, a power control unit 641 for generating a power control switching signal, and a timer unit 642 for generating a power on signal after a set time has elapsed. , An operation unit 643 for calling up the indoor master unit 20 and the monitor slave unit 30 by button operation, a power supply unit 646 for supplying power to each part of the entrance slave unit 60 by battery power, and a state storage unit operable by a battery at all times 645, and a first clock generation unit 646 that generates a clock for driving the timer unit 642.

  The radio unit 601, the frame processing unit 602, the voice processing unit 603, the first control data multiplexing unit 610, the second control data multiplexing unit 611, the ROM 620, the RAM 621, the EEPROM 622, the camera 623, the second A block including the clock generation unit 624, the intermittent reception information storage unit 625, and the control unit 630 will be referred to as a communication block 600. Each part of the communication block 600 is supplied with power via the switch 640, and the supply of power is cut off when the switch 640 is off.

  Next, the operation of radio communication apparatus 10 according to the first embodiment will be described.

  First, the operation in the idle state will be described. When the wireless communication device 10 is in an idle state, the base unit 20 controls one of the transmission slots of the control station from Slot: 1 to Slot: 12 in one frame (time width: 10 msec) shown in FIG. As a control signal. That is, a control signal is transmitted once per frame at intervals of 10 msec. In the control signal transmitted in the idle state, the signal shown in FIG. 5 is normally transmitted, and in order to notify the window sensor slave unit 40 of the warning mode in the section of 16 frames in which the frame number starts with a multiple of 2408, The signal shown in FIG. 8 is transmitted. Further, the master unit 20 receives communication from the slave unit operating as a control station in all slots from Slot 13 to Slot 14 shown in FIG. 1 in all states including the idle state. In slots that are 12 slots apart, reception is performed at the same frequency as the original sound frequency of the control signal, and in other 11 slots, reception is performed at the frequency notified by the control signal.

  When the monitor slave unit 30 is in an idle state, the monitor slave unit 30 performs intermittent reception in accordance with the transmission timing of the PT message in order to receive an incoming call from the telephone line 50, call from the entrance slave unit 60, and alarm notification of the window management system.

  When the window sensor slave unit 40 is in an idle state, the window sensor slave unit 40 matches the transmission timing of the warning mode notification transmitted for each frame in which the frame number is a multiple of 2048 in the control signal transmitted by the master unit 20. Perform intermittent reception.

  When the main unit 50 is in an idle state, the main unit 20 performs control according to the information stored in the intermittent reception information storage unit for each frame in which the frame number transmitted by the main unit 20 is a multiple of 128 plus 3 in the normal mode. Intermittent reception is performed in accordance with the signal transmission timing, and in the power saving mode, intermittent reception is performed in accordance with the transmission timing of the control signal for each frame in which the frame number transmitted by the base unit 20 is a multiple of 128 plus 3. Do.

  The power sensor slave unit 50 always starts reception at the timing of the control signal obtained by adding the offset 1 specified by the master unit 20 to a multiple of 3000 of the frame number, and thereafter performs the carrier sense as shown in FIG. The operation of transmitting and receiving the power usage amount of the electrical equipment connected to the machine 20 by connectionless communication and stopping the transmission and reception is repeated.

  Next, the operation of each unit will be described with reference to FIG. The master unit 20 that operates as a control station of the wireless communication system 10 identifies each slave unit (monitor slave unit 30. window sensor slave unit 40, power sensor slave unit 50, entrance slave unit 60) that operates as its own dependent station. The information is stored in the ROM 222, and it is determined whether or not communication is started from a proper slave during communication to determine whether communication can be started. On the other hand, each slave unit operating as a dependent station stores identification information of the master unit 20 operating as a control station, and selects a control signal of the registered master unit 20 based on the master unit identification information, Establish synchronization with base unit 20. In connectionless communication, each slave unit transmits the message together with the master unit identification information to prevent the message from reaching the wrong partner.

  Exchange of identification information between the master unit 20 operating as a control station and each slave unit operating as a dependent station is performed by two methods. One is a method of writing the identification code of the other party in the storage means of the identification information of each wireless communication device when manufacturing the wireless communication device. At the time of sale, this method is often used for a pair of a cordless telephone and a cordless telephone sold together. The other is a method of exchanging each other's identification code with a radio signal and registering it (hereinafter, the operation performed by this method is called slave registration).

  The slave unit registration is performed when a user adds a slave unit to the master unit of the cordless telephone. That is, when the user performs an operation for registering the slave unit between the master unit and the slave unit, wireless communication is activated, the mutual identification codes are exchanged, the identification code of the other party is written in the storage means, and the registration is completed.

  FIG. 15 shows a sequence of the slave unit registration operation in the wireless communication system 10. Hereinafter, the slave registration operation will be described with reference to FIG. As described above, base unit 20 transmits the control signals shown in FIGS. 5 and 6 in the idle state. In this state, when an operation for starting slave unit registration is performed on the operation unit 224 of the master unit 20, the master unit 20 enters the slave unit registration state as shown in FIG. The operation of notifying that the machine registration mode has been entered is started. On the other hand, when the slave unit registration mode is activated by an operation or the like from the slave unit operation unit, the master unit search is started, and the master unit in the slave unit registration mode, that is, the slave unit registration mode is transmitted by a QT message. The master unit is searched, the synchronization of the master unit in the slave unit registration mode with the frame and the slot is established, and the master unit supplement is completed.

  Next, the slave unit sends a slave unit registration request message to the master unit, and whether it is the slave unit's identification code and whether it is self, a monitor slave unit, a window sensor slave unit, a power sensor slave unit, or an entrance slave unit Is notified. When the master unit is notified of the slave unit registration request, slave unit identification code, and slave unit type, it registers information in each management area, sends a slave unit registration confirmation message, and performs intermittent reception cycles. And intermittent reception information necessary for the slave unit to perform intermittent reception, such as an offset and standby offset. When the slave unit registration sequence is correctly completed, the identification information, the slave unit type, and the intermittent reception information that are exchanged in both units are stored in a non-volatile storage means (for example, the EEPROM 222 of the master unit 20). The management area (for example, the slave intermittent reception information storage unit 225 of the master unit 20) is updated, and the registration completion is notified by display or sound on the display unit.

  Next, operations related to slave registration in the master 20 will be described with reference to FIG. The control unit 230 of the parent device 20 stores information on the child device registered in the EEPROM 222. That is, when the slave unit is registered in the master unit 20, it is a slave unit ID for identifying the slave unit and whether the slave unit is the monitor slave unit 30, the window sensor slave unit 40, or the power sensor slave unit. The slave type identification information for identifying whether it is 50 or the entrance slave unit 60 is stored in the EEPROM 222 together. Further, when the power sensor slave unit 50 is registered in the master unit 20, the offset assigned to each power sensor slave unit 50 is stored in the EEPROM 222 and the slave unit intermittent reception information storage unit 225 so that offsets do not overlap. to manage.

  When the entrance slave unit 60 is registered in the master unit 20, the EEPROM 222 and the slave unit intermittent reception information storage unit 225 store that the mode for determining the intermittent reception cycle of the entrance slave unit is the initial value and the normal mode. When the master unit 20 is turned off after the slave unit is registered and the master unit 20 is turned on again, the slave unit intermittent reception information storage unit 225 is set to the state stored in the EEPROM 222. .

  The control unit 230 of the master unit 20 controls the frame processing unit 202 and the radio unit 201 to transmit a control signal when a slave unit has already been registered when the power is turned on or when the first slave unit is registered after the power is turned on. . At this time, if the registered child device does not include the window sensor slave device 40, the control unit 230 of the parent device 20 performs control so that only the control signal shown in FIG. 5 is transmitted. If the registered slave unit includes the window sensor slave unit 40, control is performed so as to transmit the control signals shown in FIGS. That is, the control unit 230 selects one from Slot: 1 to Slot: 12, and selects one frequency from a plurality of predetermined frequencies, and the selected slot and frequency in FIG. 4 or FIG. The transmission unit of the wireless unit 201 is controlled so that the control signal having the format shown in FIG.

  Next, the operation of each unit will be described with reference to FIG. The control unit 230 writes its own base unit ID in the NT message buffer of the first control data multiplex unit 210, and in the PT message buffer for calling information and caller number notification in response to an event such as an incoming call. The telephone number information and the like of the incoming caller is written, and in the QT message buffer, control signals for notifying system information such as frame number, base unit function, slot number, use frequency and standby frequency are sequentially written every 16 frames. Control is performed. Thereby, the first control data multiplexing unit 210 of the base unit 20 outputs the data in the PT message buffer to the frame processing unit 202 when the frame number is an integer multiple of 16, and QT when the frame number is an integer multiple of 16 + 8. The data in the message buffer is output to the frame processing unit 202. When the frame number is other than that, that is, when the frame number is not an integral multiple of 16 and is not an integral multiple of 16 + 8, the first control data multiplexing unit 210 outputs the data of the NT message buffer to the frame processing unit 202. To do.

  In addition, the control unit 230 performs control to write control channel information and vacant channel information in the second control data multiplex unit 211 in accordance with the operation status. As a result, the second control data multiplex unit 211 transmits the control channel information in accordance with the transmission timing of the control data 2, the empty channel information in accordance with the transmission timing of the control data 3, and the control data in the frame having the even frame number. 4, the control channel information is output to the frame processing unit 202 in accordance with the transmission timing of 4, and the empty channel information is output in synchronization with the transmission timing of the control data 5.

  Also, the second control data multiplex unit 211, in a frame with an odd frame number, displays empty channel information according to the transmission timing of the control data 2, and control channel information according to the transmission timing of the control data 3, and the control data 4 The idle channel information is output to the frame processing unit 202 in accordance with the transmission timing of the control data 5, and the control channel information is output to the frame processing unit 202 in accordance with the transmission timing of the control data 5.

  In addition, when the window sensor slave unit 40 is registered, the control unit 230 adjusts the CLMS of the second control data multiplexing unit 211 in accordance with the transmission timing of the control signal of the frame obtained by adding 1 to the multiple of 2048. CLMS message composed of a slave unit identification code indicating that the destination is addressed to all received slave units, a message identifier indicating that this message is a connectionless message, and a message notifying the setting state of the alert mode Set. Accordingly, the second control data multiplexing unit 211 divides the CLMS message, and outputs the CLMS message divided in accordance with the transmission timings of the control signals CLMS1, CLMS2, CLMS3, and CLMS4 to the frame processing unit 402.

  The frame processing unit 202 includes format identification information indicating that this data string is configured in a format (FIG. 6) for sending a CLMS message, and data (master unit) output from the first control data multiplexing unit 210. (Identification information) is put on the control data 1 area to generate a data string, and further, an error detection code 1 corresponding to the data to be transmitted in the control data 1 area is generated.

  Further, the frame processing unit 202 generates an error detection code 2 corresponding to the data transmitted by the CLMS1 output in synchronization with the transmission timing of the CLMS1 output from the second control data multiplexing unit 211, and outputs the second control data multi The error detection code 3 corresponding to the data transmitted by the CLMS2 output in synchronization with the transmission timing of the CLMS2 output from the multiplex unit 211 is generated, and the transmission timing of the CLMS3 output from the second control data multiplex unit 211 is generated. The error detection code 4 corresponding to the data transmitted by the CLMS 3 output together is generated, and the data transmitted by the CLMS 4 output according to the transmission timing of the CLMS 4 output from the second control data multiplexing unit 211 The error detection code 5 is generated.

  Then, the frame processing unit 202 synchronizes with the timing of the control slot, the synchronization signal, the control data 1 (format identification information and the base unit identification information output from the first control data multiplexing unit 210), error detection code 1 , CLMS1, error detection code 2, CLMS2, error detection code 3, CLMS3, error detection code 4, CLMS4, and error detection code 5 are output to radio section 201 in this order. The data string output to the radio unit 401 is converted into a radio signal having a frequency for a control signal by the control slot and transmitted. When the transmission of the CLMS message is completed, the control unit 230 controls to return to the state of transmitting the control signal shown in FIG. 4 in the control slot after the next frame.

  Next, an operation in the slot that waits for a signal from the slave unit of the master unit 20 will be described. The master unit 20 is 11 slots excluding a slot that is 12 slots away from the control slot in 12 slots from Slot: 13 to Slot: 24 shown in FIG. It operates so as to receive a radio signal for call activation request transmitted from the device 60 in the format of FIG. (Hereinafter, a slot that waits for a call activation request is called a standby slot). For example, when the slot to which the control signal is sent is Slot: 1, the slave stations such as the monitor slave unit 30 are 11 slots from Slot: 14 to Slot: 24 except for Slot: 13 which is 12 slots away from the slot. The radio signal transmitted from is received.

Further, in the slot that is 12 slots away from the control slot in 12 slots from Slot: 13 to Slot: 24 shown in FIG. 1, the data is transmitted from the window sensor slave unit 40 and the power sensor slave unit 50 in the format of FIG. It operates to receive wireless signals of connectionless communication messages. (Hereinafter, a slot 12 slots away from a control signal transmission slot for receiving a connectionless communication message is called a control signal pair slot.)
The control unit 230 of the base unit 20 controls the reception frequency of the reception unit of the radio unit 201 in order to perform reception using the standby slot and the control signal pair slot. The reception frequency in the standby slot is changed in order from the smallest frequency number of the used frequency notified by the system information of the QT message of the control signal for each frame. The standby frequency notified by the system information of the QT message is information for notifying the reception frequency in the standby slot of the frame that transmitted the QT message. The reception frequency in the control signal pair slot is the same frequency as the transmission frequency of the control signal.

  Received data received by the wireless unit 201 is output to the frame processing unit 202. The frame processing unit 202 extracts the data string of the control data 1 and error detection code 1 area shown in FIG. 3 from the received data of each slot, and uses the data received in the error detection code 1 area to It is determined whether the data in the area is correct data. If the data is correct, the control section 230 operates to notify the control section 230 of the data in the area of the control data 1.

  Also, the data string in the CLMS1 and error detection code 2 area shown in FIG. 6 is extracted from the received data of the control signal pair Slot, and the data in the CLMS1 area is correct data using the data received in the error detection code 2 area. Whether or not the data in the CLMS2 area and the error detection code 3 area are extracted, and the data received in the error detection code 3 area is used to determine whether the data in the CLMS2 area is correct data. And the data string in the CLMS3 and error detection code 4 area is extracted, and the data received in the error detection code 4 area is used to determine whether the data in the CLMS3 area is correct data. And the data string in the error detection code 5 area are extracted, and the data received in the error detection code 5 area is used to correct the data in the CLMS 4 area. If the data of CLMS1, CLMS2, CLMS3, and CLMS4 are all correct data, the data in the areas of CLMS1, CLMS2, CLMS3, and CLMS4 are connected and notified to the control unit 230 To do.

  Next, the operation until the monitor slave unit 30 transitions to the idle state after the power is turned on will be described. When power is supplied to the monitor slave unit 30, an operation for searching for a control signal transmitted from the master unit 20, which is its own base unit (hereinafter referred to as a “base unit search operation”), is performed. When a control signal transmitted from the base unit 20 is detected, various information transmitted by the QT message of the control signal is collected, and communication can be performed by synchronizing the frame and slot with the base unit based on the information. An operation (hereinafter referred to as a frame / slot synchronization operation) is performed.

  FIG. 16 shows an operation for the monitor slave unit 30 to establish frame and slot synchronization with the master unit 20. In FIG. 16, when the operation for synchronization is started, continuous reception for finding the parent device, that is, open search is started. When the synchronization signal shown in FIG. 4 is detected from the received data, an NT message for extracting the data string of the control data 1 and error detection code 1 area from the subsequent received data and notifying the parent machine ID of its own parent machine is received. The control signal transmitted from its own base unit is detected by determining whether or not it exists.

  The example of FIG. 16 shows an example in which the first message received after the open search is activated is a PT message. In this case, continuous reception is stopped, switching to reception with a period of 10 msec, and subsequent control signals after 10 msec are received. When receiving an NT message at the time of reception after 10 msec and recognizing that the signal being received is a control signal transmitted from its own base unit, the base unit search operation shifts to the frame / slot synchronization operation.

  In the frame / slot synchronization operation, the reception of 10 msec period is continued, the various information transmitted by a plurality of QT messages is collected, and the communication with the base unit is possible when the necessary information is gathered. It becomes a state. Thereafter, an idle state is established in which reception is performed in accordance with the timing of the PT message transmitted at a cycle of 160 msec.

  Next, the operation until the monitor slave unit 30 transitions to the idle state after the power is turned on will be described with reference to FIG. When the power is turned on, the control unit 330 starts operating. The control unit 330 controls the wireless unit 301 to perform a continuous reception operation at a predetermined frequency. The reception data received by the wireless unit 301 is output to the frame processing unit 302. The frame processing unit 302 searches for the synchronization signal shown in FIG. 4 from the received data, extracts the subsequent control data 1 and the error detection code 1 area data string, and uses the data received in the error detection code 1 area. It is determined whether or not the data in the area of the control data 1 is correct data. If the data is correct, the control data 330 operates to notify the control unit 330 of the data in the area of the control data 1.

  When the control data is notified, the control unit 330 of the monitor slave unit 30 performs control so as to stop the continuous reception of the wireless unit 301 and switch the reception to the 10 msec cycle. Then, the own base unit ID stored in the EEPROM 322 is compared with the received data, and it is determined whether or not the received signal is data transmitted from the own base unit. Decide whether to move to synchronous operation. When the received data is other than the NT message, the control unit 330 determines whether the signal received based on the data received in the subsequent 10 msec period is the data transmitted from its own base unit. Judging.

  Then, when the received data is data transmitted from its own base unit, the control unit 330 continues to receive the 10 msec cycle and shifts to the frame / slot synchronization operation. When the received data is not the data transmitted from its own parent device, the open search is restarted and the search for the next parent device is started. Note that if the control signal of its own master unit is not received even though the master unit search operation has been performed for a certain time or a certain number of times at one frequency in the open search, the control unit 330 receives the control signal. The radio unit 301 is controlled to perform continuous reception operation by changing the frequency.

  After the transition to the frame / slot synchronization operation, the control unit 330 of the monitor slave unit 30 receives the frame number and system information of the QT message to establish the synchronization of the frame number and slot number with the master unit 20, Also, the setting order of the reception frequency of the standby slot of the parent device is recognized. And control part 330 will start control which shifts to the idle state which receives in 160 msec period, if all the necessary information notified by a control signal is received. That is, the control is switched so as to activate reception of the wireless unit 301 in accordance with the timing of the PT message transmitted with a frame number that is a multiple of 16.

  Since all monitor slave units 30 operating in the wireless communication system 10 perform intermittent reception so as to receive a control signal transmitted in a frame whose frame number is a multiple of 16, from the master unit 20 in the slave unit registration. There is no need to store the intermittent reception information to be notified, and the program stored in the ROM 620 is controlled to receive a control signal transmitted in a frame whose frame number is a multiple of 16.

  Next, the operation of communication by connection communication such as voice call and data communication between the master unit 20 and the slave unit, the call operation of the master unit 20 and the monitor slave unit 30 as an example of the operation at the occurrence of an incoming line event. explain. When an external line incoming event occurs, control unit 230 of base unit 20 writes a PT message notifying the incoming of an external line (hereinafter referred to as an external line incoming message) in the PT message buffer of first control data multiplexing unit 210. This outside line incoming message is output to the wireless unit 201 at a timing at which the frame number is a multiple of 16, and is sent as a control signal in the control data 1 area shown in FIG.

  On the other hand, the radio unit 301 of the monitor slave unit 30 is receiving in the idle state at a timing with a frame number that is a multiple of 16. The radio unit 301 receives an incoming call message transmitted on the control signal from the base unit 20. Received and output to the frame processing unit 202. Then, the incoming line message is extracted from the area of the control data 1 shown in FIG. 4 by the frame processing unit 202 and output to the control unit 330.

  When receiving the outside line incoming message, the control unit 330 of the monitor slave unit 30 controls the display unit 323 to ring the ringer sound and notify the user of the incoming outside line. When the user performs an incoming call response operation on the operation unit 324, the control unit 330 selects one slot to be used for transmission from the slave unit in the subsequent communication from among the standby slots, and the subsequent communication. Select the frequency "communication frequency" to be used for. Hereinafter, the slot selected for transmission from the slave unit is referred to as “communication slave unit transmission slot” (or communication master unit reception slot). Furthermore, the control unit 330 selects a slot 12 slots away from the selected communication slave transmission slot, as a slot used for reception by the slave in subsequent communications. Hereinafter, the slot selected for reception by the slave unit is referred to as “communication slave unit reception slot” (or communication master unit transmission slot).

  Then, the control unit 330 sets the wireless unit 301 to receive the communication slave unit reception slot and the communication slave unit transmission slot using the communication frequency in these slots in order to check whether or not the communication slave unit transmission slot can be used without interference. Then, carrier sense of the communication slave unit transmission slot and the communication slave unit reception slot is performed.

  When the reception level of the interference wave of the slot is equal to or less than the threshold stored in the EEPROM 322, the control unit 330 of the monitor slave unit 30 determines that the slot can be used, and a message for starting the communication channel ( Hereinafter, the operation shifts to an operation for transmitting a radio link establishment request message. That is, the control unit 330 writes a radio link establishment request message in the MT message buffer of the control data multiplexing unit 310, and uses this slot in accordance with the slot that the base unit 20 waits at a frequency that matches the current communication frequency. The wireless unit 301 is controlled to transmit at the communication frequency. At this time, the communication between the monitor slave unit 30 and the master unit 20 uses the format shown in FIG. 7 as described above. The frame processing unit 302 puts the MT message including the radio link establishment request message on the control data 1 area in the format shown in FIG. 7 and puts the voice data output from the voice processing unit 303 on the voice data area. Further, each error detection code is calculated, put on the area of error detection code 1 and output to the radio section 301, and the radio section 301 operates to transmit a radio signal including these.

  The radio signal including the radio link establishment request message transmitted from the monitor slave unit 30 is received by the radio unit 201 of the base unit 20 and output to the frame processing unit 202, and the radio link establishment request message is transmitted by the frame processing unit 202. Is taken out and notified to the control unit 230.

  When receiving the radio link establishment request message, the control unit 230 of the base unit 20 receives a slot (communication base unit reception slot) that has received the radio link establishment request message from the monitor slave unit 30, and a slot (12 slots away from the slot). Using the uplink / downlink 2 slots consisting of the communication master unit transmission slot), control is started for voice communication with the slave unit using the frequency (communication frequency) at which the radio link establishment request message is received.

  That is, in the control of voice communication, the control unit 230 of the base unit 20 transmits the communication base unit transmission slot using the communication frequency in the frames after receiving the radio link establishment request message, and receives the communication base unit. The radio unit 201 is controlled to perform reception using the slot, and at that time, the radio link establishment response message is written in the MT message buffer corresponding to the communication base unit transmission slot of the first control data multiplex unit 210. The radio link establishment response message is output to the frame processing unit 202 so as to be transmitted at the timing of the communication master unit transmission slot, and the frame processing unit 202 sets the MT message of the radio link establishment response message in the control data 1 area. The voice data output from the voice processing unit 203 is transmitted on the voice data area, and the error detection code is calculated and transmitted on the error detection code area.

  As described above, a bidirectional wireless link is established between the monitor slave unit 30 and the master unit 20 at a slot 12 slots away. Then, the monitor slave unit 30 writes the data link layer activation request message in the control data multiplex unit 310 to the CT message buffer of the control data multiplex unit 310, and the master unit 20 stores in the first control data multiplex unit 210. A data link layer response message is written in the CT message buffer of the control data multiplex unit 310, and the CT message is transmitted and received in the same manner as the transmission and reception of the MT message, thereby establishing a data link capable of retransmission control. The CT message is used for communication for notifying an upper layer negotiation message such as a network layer. When transmission is not confirmed by using this CT message, retransmission control is performed.

  The monitor slave unit 30 writes an upper layer message such as a network layer activation request message (SETUP) to the control data multiplex unit 310 in the CT message buffer of the control data multiplex unit 310, and the master unit 20 performs the first control. An upper layer message such as a network layer response message (CONNECT) is written to the data multiplex unit 210 in the CT message buffer of the control data multiplex unit 310, and the CT message is transmitted / received similarly to the transmission / reception of the MT message, and Then, the upper layer is negotiated through the data link layer that is guaranteed to be transmitted, the call connection is completed, and the state shifts to a state where communication is possible.

  Next, the operation in the case of performing communication by connection communication such as voice call or data communication between the parent device 20 and the child device will be described with reference to FIG. When the window sensor slave unit 40 cannot notify the master unit 20 of the window state change by connectionless communication, the window sensor slave unit 40 notifies the master unit of the window state change using connection communication. FIG. 17 shows an operation example in which connection communication is performed at that time. The master unit 20 and the window sensor slave unit (in FIG. 17, referred to as the sensor slave unit) that transmit a control signal at Slot: 1 have Slot: 2. And Slot: 14 shows the operation until the connection communication wireless link is activated and released.

  FIG. 17 shows an example in which the start of wireless communication by connection communication is started in frame 2, and the window sensor slave unit 40 receives a control signal of the master unit 20 in frame 2 other than Slot: 1. A slot: 2 is selected for reception from among the reception slots (that is, slot: 2 to slot: 12), and a slot: 14 that is 12 slots apart from slot: 2 is selected for transmission, and these reception slots: 2 And a slot for transmission: 14 to establish a bidirectional wireless link for communication. At this time, the window sensor slave unit 40 selects a frequency to be used for communication from the communication frequencies notified by the control signal. Then, the frame when the standby frequency of the base unit 20 matches the selected frequency is determined as a frame for transmitting the radio link establishment request message, and the frequency selected by the selected transmission / reception slot prior to transmission of the radio link establishment request message. Make a career sense at.

  FIG. 17 shows the operation when the base unit 20 selects a frequency that the base unit 20 waits for in frame 4, carrier sense of Slot: 2 and Slot: 14 is performed from frame 2, and a radio link is established at Slot: 14 of frame 4. Sending request. At this time, if it is determined that the interference signal is detected by carrier sense and transmission is impossible, at least one of the communication frequency and the slot is changed, a new carrier sense is performed, and a radio link establishment request message is transmitted. Control.

  When base unit 20 receives the wireless link establishment request message in standby slot (Slot: 14 in FIG. 17), reception of the slot (Slot: 14 in FIG. 17) that received the wireless link establishment request message for the subsequent frames is also received. The frequency is fixed to the frequency at which the radio link establishment request message is received, and the radio link establishment response message is transmitted at a slot 12 slots away from the slot that has received the radio link establishment request message. In FIG. 17, the wireless link establishment response message is transmitted in slot 5 of frame 5.

  When the window sensor slave unit 40 receives the radio link establishment response message, the window sensor slave unit 40 shifts to a radio link establishment state, stops receiving the control slot, and performs transmission / reception using the communication slots (Slot: 2 and Slot: 14). . If the window sensor slave unit 40 cannot receive the wireless link establishment response message, the window sensor slave unit 40 changes at least one of the communication frequency and the slot, similarly to the case where it is determined that transmission is not possible by carrier sense, and newly detects the carrier sense. It works to start over.

  In FIG. 17, the window sensor slave unit 40 receives the wireless link establishment response message of frame 5, shifts to the wireless link establishment state, and performs transmission / reception in the communication slot after frame 6. After that, the window sensor slave unit 40 and the master unit 20 use Slot: 2 and Slot: 14, perform wireless communication, activate the data link layer for retransmission control, activate the network layer, and the window state Sends and receives a message notifying the user and the response. When the notification of the window state is completed, the window sensor slave unit 40 stops the network layer, stops the data link layer, and releases the radio link, and returns to the control signal reception state of Slot: 1. In FIG. 17, communication is performed from frame 6 to slot N + 1 of frame N + 1, during which data link layer activation, network layer activation, transmission and reception of a message notifying the window state and its response, stop of the network layer, The data link layer is stopped and the radio link is released, and then the control slot (Slot: 1) is received from frame N + 2.

  As described above, the operation of connection communication between the master unit 20 and the monitor slave unit 30 is shown as an example of the incoming call operation, and the state of slot transmission / reception activation at the time of connection communication between the master unit 20 and the window sensor slave unit 40 is shown. The operation in the case of starting connection communication between the monitor slave unit 30, the window sensor slave unit 40, the power sensor slave unit 50, the entrance slave unit 60 and the master unit 20 is the same. The monitor slave unit 30, the window sensor slave unit 40, the power sensor slave unit 50, and the entrance slave unit 60 start connection communication with the master unit 20 in the same manner as in the above example, and perform voice communication, data communication, etc. according to the wireless communication device. Provide services. Note that the type of service such as voice communication or data communication is notified by a network layer activation request message (SETUP) or the like, and the control unit of each wireless communication apparatus transmits data sent in the second field shown in FIG. Is to be processed as voice or data. The processing blocks with the same names of the monitor slave unit 30 shown in FIG. 11, the window sensor slave unit 40 shown in FIG. 12, the power sensor slave unit 50 shown in FIG. 13, and the entrance slave unit 60 shown in FIG. It has the same function and effect in the operation of connection communication with the machine 20, and the connection communication is started between the monitor slave unit 30, the window sensor slave unit 40, the power sensor slave unit 50, the entrance slave unit 60 and the master unit 20, respectively. Description of operations for performing voice calls, data communication, and message transmission will be omitted.

  Next, the operation of the window sensor slave unit 40 will be described with reference to FIG. The window sensor slave unit 40 is in a state in which the switch 440 is turned off in a normal state and power is not supplied to the communication block 400. From this state, when the window changes from the closed state to the opened state, or from the opened state to the closed state, the sensor unit 443 detects the change, and the sensor unit 443 receives the power-on signal. Is output to the power supply control unit 441. When a power-on signal is input, the power controller 441 outputs a switching signal for turning on the switch 440. As a result, the switch 440 is turned on, and power is supplied to the communication block 400 via the switch 440.

  When power is supplied to the communication block 400, the control unit 430 starts operation and starts control according to the program written in the ROM 420. That is, the control unit 430 reads the window state from the sensor unit 443 and performs an operation of notifying the base unit 20 of the read window state by a wireless signal.

  Next, the operation until the window sensor slave unit 40 transitions to the idle state after the power is turned on will be described. FIG. 18 shows a sequence for shifting from the power-on to the idle state. As shown in FIG. 18, the transition from the power-on to the idle state is performed by searching for the parent device that supplements the control signal of the parent device 20 (Step 1), and acquiring the frame number and slot number transmitted by the control signal of the parent device. Frame / slot synchronization establishment (Step 2) for establishing TDMA synchronization with the master unit 20, status notification (Step 3) for notifying the master unit 20 of the open / closed state of the window, and window sensor element from the master unit 20 in the control signal slot. The intermittent reception preparation (Step 4) for measuring the transmission interval of messages transmitted to the device 40 and preparing for intermittent reception, and the power supply of the wireless block 400 in accordance with the transmission timing of the message transmitted to the window sensor slave device 40 It consists of five steps of intermittent reception (Step 5) that waits for a message from the base unit 20 while performing on / off. Hereinafter, the operation from Step 1 to Step 5 will be described with the operation of each part of the window sensor slave unit 40 shown in FIG.

  First, a description will be given of a parent device search for supplementing the control signal of the parent device 20 in Step 1. When power is supplied to the window sensor slave unit 40, the control unit 430 starts a master unit search operation and controls the radio unit 401 to perform a continuous reception operation at a predetermined frequency. The reception data received by the wireless unit 401 is output to the frame processing unit 402. If it is a control signal from the master unit 20, it should include the synchronization signal shown in FIG. 4 and then the control data. The frame processing unit 402 searches for the synchronization signal shown in FIG. 4 from the received data, extracts the subsequent control data 1 and the error detection code 1 area data string, and uses the data received in the error detection code 1 area. It is determined whether or not the data in the area of the control data 1 is correct data. If the data is correct, the control data 430 operates to notify the control unit 430 of the data in the area of the control data 1.

  When the control data is notified, the control unit 430 controls to stop the continuous reception of the wireless unit 401 and switch to the synchronous reception operation of receiving a signal at a cycle of 10 msec. When the received control data includes an NT message for notifying the parent machine ID, the control unit 430 compares the received data with the own parent machine ID stored in the EEPROM 422, and the received signal is received from the own parent machine. It is determined whether or not the data is transmitted, and it is determined whether or not to shift from the parent device search operation to the frame / slot synchronization operation. If the first received data is other than the NT message, the control unit 430 is the data transmitted from its parent device based on the data received in the 10 msec period reception operation thereafter. Determine whether or not.

  Then, if the received data is data transmitted from its own base unit, the control unit 430 continues to receive for a period of 10 msec, and shifts to the step 2 frame / slot synchronization operation. If the received data is not data transmitted from its own base unit, control unit 430 restarts open search and starts searching for the next base unit. In addition, when the control signal of its own base unit cannot be received even though the base unit search operation is performed at a single frequency for a certain period of time or a certain number of times, the control unit 430 changes the reception frequency and continues. The wireless unit 401 is controlled to perform a receiving operation.

  Next, the frame / slot synchronization establishment for acquiring the frame number and slot number transmitted by the control signal of the master unit of Step 2 and establishing the TDMA synchronization with the master unit 20 will be described. When the control unit 430 shifts to the frame / slot synchronization establishment operation, the control unit 430 reads the frame number and system information of the QT message placed in the area of the subsequent control data 1, and based on these information, the frame number and the base unit 20 An operation for establishing synchronization of slot numbers is performed, and the frame with the base unit 20 is based on control channel information and empty channel information received in the control data 2, control data 3, control data 4 or control data 5 area. The operation of establishing the synchronization of the number and the slot number is performed in parallel. That is, if no reception error has occurred in the slot data that received the base unit ID of its own base unit in the control data 1 area, the control channel information received in the control data 2 and control data 3 areas of the slot And frame number and slot number synchronization are established with the free channel information.

  If the communication environment is bad and all control data of the synchronization signal cannot be normally received in one slot, synchronization may be established by receiving the synchronization signal in a plurality of frames every 10 msec. For example, in an environment where control data 1 and control data 2 can be correctly received with the first synchronization signal and control data 3, control data 4 and control data 5 cannot be correctly received, the control data 1 area of the first synchronization signal is self-parent. One of the control channel information or the empty channel information is received in the area of the master unit ID and the control data 2 of the machine, and the other of the control channel information or the empty channel information is received in the area of the control data 2 of the slot received in the next frame. By receiving, the synchronization of the frame number and the slot number is established. In an environment where the control data 2, the control data 3, the control data 4, and the control data 5 cannot be received correctly, the control data 1 is sent at a frequency of once every 16 frames in the area of the control data 1 like the monitor slave unit 30. Necessary information is collected from the QT message, and synchronization of the frame number and slot number is established.

  FIG. 19 and FIG. 20 show examples of operations from the parent device search operation in Step 1 until the synchronization of the frame number and slot number in Step 2 is established. The example of FIG. 19 is an example in the case where no reception error has occurred in the slot data that has received the parent machine ID of the parent machine in the control data 1 area. The example of FIG. 20 is an example when the control data 3, the control data 4, and the control data 5 cannot be received correctly.

  As shown in FIG. 20, when the control data 3, control data 4, and control data 5 cannot be received correctly, the slot that received the base unit ID of its own base unit in the area of the control data 1 and the next frame Synchronization is established on the basis of the received data in the slot control data 2 area received in (1). Note that the control data 2, control data 3, control data 4, and control data 5 cannot be correctly received as in the example of FIG. 20, and the operation of establishing synchronization only with the data received in the control data 1 area is shown in FIG. The operation is the same as the operation up to the completion of the frame / slot synchronization operation in the operation example of the synchronization establishment of the monitor slave unit 30 shown in FIG.

  Next, the state notification for notifying the opening / closing state of the window to the master device 20 of Step 3 will be described. When the synchronization of the frame / slot of Step 3 is completed, an operation of transmitting a message notifying the opening / closing state of the window to the base unit 20 is started. The control unit 430 of the window sensor slave unit 40 receives the control signal at the same frequency as the frequency at which the control signal was received in a slot 12 slots away from the slot of the control signal while continuing to receive the slot from which the control signal could be received in each frame. The radio unit 401 is controlled to measure the interference wave level (that is, carrier sense). When the window sensor slave unit 40 transmits data to the master unit 20 by the connectionless message communication method, the window sensor slave unit 40 transmits data at a slot 12 slots away from the slot of the control signal. Hereinafter, this slot is referred to as an uplink connectionless data transmission slot. The uplink connectionless data transmission slot is received in two consecutive frames, the interference wave level of the uplink connectionless data transmission slot is measured, and if the interference wave level is below a specified value, the connectionless message communication method is used. The operation shifts to an operation for notifying the parent device 20 of the state of the window sensor slave device 40.

  Next, the operation in which the window sensor slave unit 40 notifies the master unit 20 of the open / closed state of the window by the connectionless message communication method and the transmission / reception switching operation of each slot will be described in detail. FIG. 22 shows that the window sensor slave unit 40 detects that the window state has changed, establishes synchronization with the parent unit 20, notifies the parent unit 20 of the window state with a CLMS message, and supplies power to the communication block 400. The example of operation | movement until is interrupted is shown. In the following description, the frame with frame number N shown in the figure is described as frame N, and the slot with slot number N is described as Slot: N.

  In FIG. 22, the state of the window changes at the time of frame 1, and the window sensor slave unit 40 counts that. When the window sensor slave unit 40 detects a change in the state of the window, power is supplied to the communication block 400, an operation for synchronization is started, and continuous reception (open search) is activated. When the sync signal is detected from the received data, the master unit identification information is obtained from the subsequent data to check if it is truly a control signal from the master unit. (Step 3). In the example of FIG. 22, synchronization with the control signal of the parent device is established at Slot: 1 of frame 2.

  When synchronization is established, the control unit 430 of the window sensor slave unit 40 notifies the open / close state of the window at a frequency equal to the frequency at which the control signal is received using the uplink connectionless data transmission slot. That is, the window sensor slave unit 40 selects, as an uplink connectionless data transmission slot, a slot: 13 that is 12 slots away from the slot that has received the control signal and is a half of the number of slots accommodated in the frame. Then, carrier sense for confirming the presence / absence of an interfering wave is performed at slot 2 of frame 2 and frame 3, and a CLMS message for notifying the state of the window is transmitted at slot 13 of next frame 4.

  Further, the window sensor slave unit 40 continues to receive the control signal at the slot 1 of the frame after the synchronization with the control signal of the master unit is established at the slot 1 of the frame 2 and maintains the synchronization with the master unit 20. At the same time, it waits for a reception response notifying the reception of the CLMS message. In the example of FIG. 22, the window sensor slave unit 40 receives the reception response from the master unit 20 in the frame 5, stops the operation of notifying the window state change, and the power to the communication block 400 is shut off. Note that the reception frequency at the time of carrier sense at Slot: 13 and the transmission frequency of the CLMS message are both the same as the reception frequency of the control signal at Slot: 1.

  FIG. 6 shows a signal format in the case of message communication using the connectionless message communication method. A signal of the connectionless message communication system has a configuration close to the format of the control signal shown in FIG. 4, and other control data is connected after the control data 1. In FIG. 6, message transmission areas are described as CLMS1, CLMS2, CLMS3, and CLMS4. Error detection code 2 is a code for detecting an error in CLMS1, error detection code 3 is a code for detecting an error in CLMS2, error detection code 4 is a code for detecting an error in CLMS3, and error detection A code 5 is a code for detecting an error of the CLMS 4. The synchronization signal, control data 1 and error detection code 1 are the same as the format of the control signal in FIG.

  A message for notifying the opening / closing state of the window is divided and sent to the CLMS1, CLMS2, CLMS3, and CLMS4 areas. In order to notify the window state by the connectionless message communication method, the control unit 430 of the window sensor slave unit 40 sets the master unit ID in the NT message buffer of the first control data multiplex unit 410, and the second control data multi-unit. A CLMS message composed of a slave unit identification code, a message identifier indicating that this message is a connectionless message, and a message notifying the opening / closing state of the window is set in the CLMS information of the plex unit 410.

  The first control data multiplexing unit 410 outputs the data in the NT message buffer to the frame processing unit 202 in accordance with the transmission timing of the control data 1 of the uplink connectionless data transmission slot. The second control data multiplex unit 411 divides the CLMS message and outputs the CLMS message divided in accordance with the transmission timing of the CLMS1, CLMS2, CLMS3, and CLMS4 of the uplink connectionless data transmission slot to the frame processing unit 402. .

  The frame processing unit 402 uses the format identification information indicating that this data string is configured in the format shown in FIG. 6 for sending the CLMS message, and the control data using the data output from the first control data multiplexing unit 410. A data string to be transmitted in the 1 area is generated, and an error detection code 1 corresponding to the data to be transmitted in the control data 1 area is generated. Further, the frame processing unit 402 generates an error detection code 2 corresponding to the data transmitted by the CLMS1 output in synchronization with the transmission timing of the CLMS1 output from the second control data multiplexing unit 411, and outputs the second control data multi The error detection code 3 corresponding to the data transmitted by the CLMS 2 output in synchronization with the transmission timing of the CLMS 2 output from the plexer 411 is generated, and the transmission timing of the CLMS 3 output from the second control data multiplex unit 411 is generated. The error detection code 4 corresponding to the data transmitted by the CLMS 3 output together is generated, and the data transmitted by the CLMS 4 output in accordance with the transmission timing of the CLMS 4 output from the second control data multiplexing unit 411 The error detection code 5 is generated.

  Then, the frame processing unit 402 synchronizes with the timing of the uplink connectionless data transmission slot, the above synchronization signal, control data 1 (format identification information and data output from the first control data multiplexing unit 410), error detection The data string is output to the radio unit 401 in the order of code 1, CLMS 1, error detection code 2, CLMS 2, error detection code 3, CLMS 3, error detection code 4, CLMS 4, and error detection code 5. The data string output to the radio unit 401 is converted into a radio signal having a frequency equal to the reception frequency of the control signal by the uplink connectionless data transmission slot and transmitted.

  When the transmission of the CLMS message is completed, after the next frame, the control unit 430 of the window sensor slave unit 40 controls the radio unit 430 so that only the slot receiving the control signal continues the reception state. When receiving a reception response indicating that the CLMS message including the status information of the window sensor slave unit 40 is received from the transmission destination master unit 20, the status information of the window sensor slave unit 40 reaches the master unit 20 normally. Then, the control unit 430 sets the detection condition of the sensor unit 443 so that the power-on signal is output to the power control unit 441 when the window state changes from the previously notified state. Transition to intermittent reception preparation.

  If the reception response from the master unit is not received within a certain time, the message for notifying the open / close state of the window is retransmitted at a constant interval by the connectionless message communication method.

  Also, when the interference level of the uplink connectionless data transmission slot is high and the connectionless message communication method cannot be used, and when the message is retransmitted by the connectionless message communication method of the specified number of times, the reception response from the master unit is sent. When reception is not possible, the mode is switched to the connection message communication method, the open / close state of the window is notified to the base unit 20, and the process proceeds to Step 4 for intermittent reception preparation.

  Next, the intermittent reception preparation for preparing the intermittent reception by measuring the transmission interval of the message transmitted from the master unit 20 to the window sensor slave unit 40 in the slot of the control signal of Step 4 will be described. When the control unit 430 completes the transmission of the status notification message to the base unit 20, the control unit 430 stops the transmission and controls the wireless unit 401 to receive the control signal at a cycle of 10 msec, and the frame number obtained by adding 1 to a multiple of 2048 Control is performed so as to continue the reception operation at the cycle of 10 msec until the control signal of the frame is received twice. During this time, the control unit 430 measures the elapsed time of 2048 frames with the clock generated by the first clock generation unit, determines the timer setting value of the timer unit 442 for intermittent reception, and performs the intermittent reception. A timer value is set in the timer unit 442. In addition, the control unit 430 writes information indicating that it is within the range in the state storage unit 445 and writes the reception frequency in the EEPROM 422. Finally, the control unit 430 outputs a power off signal to the power control unit 441. When the power-off signal is input, the power controller 441 outputs a switching signal that turns off the switch 440, and the switch 440 cuts off the supply of power to the communication block 400 according to the switching signal.

  Next, the intermittent reception of waiting for a message from the base unit 20 while turning on / off the power of the wireless block 400 in accordance with the transmission timing of the message transmitted to the window sensor slave unit 40 in Step 5 will be described. The timer unit 442 and the first clock generation unit 446 of the window sensor slave unit 40 are always driven by a battery, and after the time set as the timer value for intermittent reception described above has elapsed, the timer unit 442 supplies a power-on signal. Is output to the power control unit 441, power is supplied to the communication block 400, and the control unit 430 starts operation. When the control unit 430 starts the operation, the control unit 430 checks the power supply control unit 441. When the control unit 430 recognizes that the power-on factor is the expiration of the timer, the control unit 430 reads the state storage unit 445 and writes information indicating that it is within the range. Then, the reception frequency is read from the EEPROM 422, and the wireless unit 401 is controlled to perform the reception operation at the read frequency. Then, the control signal of the master unit is received, and the timer setting value of the timer unit 442 for intermittent reception is determined based on the received timing. Similarly to the above, the control unit 430 sets a timer value for intermittent reception in the timer unit 442, outputs a power-off signal to the power supply control unit 441, and repeats the above operation.

  As described above, the function of performing intermittent reception by controlling the power supply of the communication block 400 has been described using the window sensor slave unit 40 as an example, but the entrance slave unit 60 shown in FIG. 14 also has the same function and performs intermittent reception operation. The necessary processing blocks are given the same names as those of the window sensor slave unit 30 in FIG. 11, and the description thereof is omitted here. The entrance slave unit 60 stores the intermittent reception cycle in the intermittent reception information storage unit 625. This information is read from the EEPROM 622 when the switch 640 is turned on and the control 630 starts operating. Further, the information for the intermittent reception information storage unit 625 and the information for the intermittent reception information storage unit 625 stored in the EEPROM 622 are updated every time a notification of switching between the normal mode and the power save mode is received from the master unit 20. Information that receives control information of a frame obtained by adding 3 to a multiple of 128 when the normal mode is notified, and information that receives control information of a frame obtained by adding 3 to a multiple of 256 when the power save mode is notified The control unit 630 refers to the intermittent reception information storage unit 625 when determining the timer set value of the timer unit 642 in the idle state during Step 4 intermittent reception preparation or Step 5 intermittent reception shown in FIG. Then, control is performed so that the intermittent reception cycle according to the operation mode is obtained.

  Next, the operation when the window state of the window sensor slave unit 40 changes will be described. When the state of the window changes, a power-on signal is output from the sensor unit 443 to the power control unit 441, power is supplied to the communication block 400, and the control unit 430 starts operation. When control unit 430 starts operation, it confirms power supply control unit 441, and if it recognizes that the power-on factor is a change in the state of the window, the above-described window sensor slave unit 40 transitions to the idle state after power-on. The operations from Step 1 to Step 5 are executed, the new window state is notified to the main unit 20, and the idle state is restored.

  Note that the window state of the window sensor slave unit 40 also changes when the operation of calling the indoor master unit 20 and the monitor slave unit 30 is started by operating the button of the operation unit 643 of the entrance slave unit 60 shown in FIG. Similar to the operation in the case of the above, a power-on signal is output from the operation unit 643 to the power control unit 641, power is supplied to the communication block 600, and the control unit 630 starts the operation. When the control unit 630 starts the operation, the power source control unit 641 is checked, and if the cause of power on is recognized as a button operation of the operation unit 643, the window sensor slave unit 40 described above enters an idle state after the power is turned on. The same operation as in Step 1 to Step 5 until the transition is performed, and when the window sensor slave unit 40 sends a message notifying the opening / closing state of the window in Step 3, the button of the operation unit 643 is pressed, that is, the visitor. Is sent to the master unit 20, and the idle state is restored. Then, base unit 20 starts an incoming call operation from the entrance slave unit.

  Next, the operation from the start of the window sensor slave unit 40 to the transition to the idle state will be described in detail with reference to FIG. FIG. 21 shows an example of the operation when power is supplied to the wireless block 400 of the window sensor slave unit 40 when the power is turned on or when the window changes, the window state is notified to the master unit 20 and the state shifts to the idle state. . This operation corresponds to Step 1 to Step 5 in FIG. In the following description, the frame with the frame number N shown in the figure is described as a frame N.

  In FIG. 21, the power is turned on or the state of the window is changed at the time of frame 1, the power is supplied to the communication block, and the continuous reception of Step 1 is activated. At the same time, the frame 2 and the slot / slot synchronization of Step 2 are completed at the same time as supplementing the parent device in frame 2. Then, the process proceeds to Step 3 for notifying the state, the interference wave level of the transmission slot is measured in the frame 2 and the frame 3, the message for notifying the window state change is transmitted in the frame 4, and the response from the parent unit is transmitted in the frame 5. , Step 3 is completed, and the process proceeds to the intermittent reception preparation in Step 4.

  In the intermittent reception of Step 4 starting from the frame 5, the reception is continued for a period of 10 msec until two frames arrive, which is obtained by adding 1 to a multiple of 2048 in which the parent device 20 transmits a message addressed to the sensor child device. In FIG. 21, reception is continued at a period of 10 msec until the frame 4097. The window sensor slave unit 40 performs time measurement with the clock generated by the first clock generation unit 446 in the section between the frame 2049 and the frame 4097, and supplies power to the communication block 400 for receiving the frame 6145 at the next reception timing. A timer value corresponding to the ON timing is determined, and the timer 442 is set. And the power supply of the radio | wireless block 400 is interrupted | blocked and it transfers to the intermittent reception of Step5.

  When the timer 442 expires, the wireless block 400 is powered on, and reception is performed in accordance with the control signal transmission timing of the frame 6145. Next time based on the difference between the expected reception timing and the actually received timing, The timer value corresponding to the power-on timing of the communication block 400 for receiving the frame 8193 at the reception timing is determined, and the timer 442 is set. Then, the wireless block 400 is powered off. Thereafter, until the sensor unit 443 detects a change in the state of the window, each time the timer 442 expires and reception is performed, the timer value is determined based on the difference between the expected reception timing and the actually received timing. The timer 442 is set, and the operation of shutting off the power of the wireless block 400 is repeated.

  Next, an operation in which base unit 20 receives a connectionless communication message will be described. In the wireless communication system 10, for example, as shown in FIG. 22 described above, when the window sensor slave unit 40 detects a change in the state of the window, it transmits a CLMS message for connectionless communication to the master unit 20 as shown in FIG. Is notified to the master unit 20. In addition, the power sensor slave unit 50 notifies the power usage amount by connectionless communication, and the entrance slave unit 60 notifies a message notifying the visitor by connectionless communication. In connectionless communication, the processing blocks having the same functions in the processing blocks of the window sensor slave unit 40 shown in FIG. 12, the power sensor slave unit 50 shown in FIG. 13, and the entrance slave unit 60 shown in FIG. 14 are the same. Here, a name is given, and here, an operation in which the master unit 20 receives a CLMS message for notifying the window state from the window sensor slave unit 40 will be described as an example.

  For example, a radio signal including a CLMS message transmitted from the window sensor slave unit 40 is received by the radio unit 201 of the base unit 20 and output to the frame processing unit 202. The frame processing unit 202 extracts the data string of the control data 1 and error detection code 1 area from the radio signal, and uses the data received in the error detection code 1 area, and the data of the control data 1 area is correct data. It is determined whether or not. When the format identification information in the received signal indicates that the received signal is configured in the format shown in FIG. 6, the frame processing unit 202 uses the data received in the error detection code 2 area. The data of the CLMS1 area, the data of the CLMS2 area using the data received in the area of the error detection code 3, the data of the CLMS3 area using the data received in the area of the error detection code 4, Using the data received in the error detection code 5 area, it is determined whether the data in the CLMS 4 area is correctly received. Then, when all the data received in the CLMS1, CLMS2, CLMS3, and CLMS4 areas are correctly received, the frame processing unit 202 combines the data received in the CLMS1, CLMS2, CLMS3, and CLMS4 areas. It operates to notify the control unit 230 together with data received in the control data 1 area as two CLMS messages.

  The control unit 230 that has received the received data and the CLMS message in the control data 1 area receives the CLMS message if the data received in the control data 1 area is an NT message having the same base unit identification information as its own ID. It is determined that it is addressed to itself, and an operation corresponding to the information notified by the CLMS message is started. If the data received in the area of the control data 1 is other than the NT message having the same master unit identification information as its own ID, the CLMS message is discarded. Further, the control unit 230 determines whether the transmission source is a registered sensor slave unit from the slave unit identification code included in the CLMS message, and if it is a CLMS message from an unregistered slave unit, the CLMS message Is discarded.

  When the control unit 230 receives a CLMS message for notifying the state of the window addressed to itself from the registered sensor slave unit, the control unit 230 displays the window state of the corresponding sensor slave unit on the display unit 223. In addition, the display of the state of the window is a display on the LCD or a sound of a ringer or the like. When the window is set to be notified by a warning sound, it is notified that the window has been opened. Then, the ringer is sounded, the surroundings are notified that the window has been opened, and the ringer is operated to be stopped by an instruction from the operation unit 224.

  Next, an operation in which base unit 20 transmits a connectionless communication message will be described. Here, when the master unit 20 receives a CLMS message including window information from the window sensor slave unit 40, it indicates that the CLMS message including window information is normally received from the master unit 20 to the window sensor slave unit 40. The operation of sending a message of connectionless communication of the base unit 20 will be described taking the operation of notifying a reception response as an example. A message (hereinafter referred to as a reception response) for notifying that a CLMS message for notifying a window state transmitted by connectionless communication is received from the base unit 20 uses the format shown in FIG. 6 and transmits a control signal. The slot is transmitted to the slave unit at the same frequency as the control signal. That is, the control unit 230 of the base unit 20 matches the timing of the control slot of the frame for transmitting the base unit identification code in the control data 1 area with the window sensor that is the transmission destination in the CLMS information of the second control data multiplexing unit 211. A CLMS message composed of a slave unit identification code of the slave unit 40, a message identifier indicating that this message is a connectionless message, and a message notifying a reception response is set. Accordingly, the second control data multiplexing unit 211 divides the CLMS message, and outputs the CLMS message divided in accordance with the transmission timings of the control signals CLMS1, CLMS2, CLMS3, and CLMS4 to the frame processing unit 402.

  The frame processing unit 202 includes format identification information indicating that this data string is configured in a format (FIG. 6) for sending a CLMS message, and data (master unit) output from the first control data multiplexing unit 210. (Identification information) is put on the control data 1 area to generate a data string, and further, an error detection code 1 corresponding to the data to be transmitted in the control data 1 area is generated. Further, the frame processing unit 202 generates an error detection code 2 corresponding to the data transmitted by the CLMS1 output in synchronization with the transmission timing of the CLMS1 output from the second control data multiplexing unit 211, and outputs the second control data multi The error detection code 3 corresponding to the data transmitted by the CLMS2 output in synchronization with the transmission timing of the CLMS2 output from the multiplex unit 211 is generated, and the transmission timing of the CLMS3 output from the second control data multiplex unit 211 is generated. The error detection code 4 corresponding to the data transmitted by the CLMS 3 output together is generated, and the data transmitted by the CLMS 4 output in accordance with the transmission timing of the CLMS 4 output from the second control data multiplexing unit 411 The error detection code 5 is generated.

  Then, the frame processing unit 202 synchronizes with the timing of the control slot, the synchronization signal, the control data 1 (format identification information and the base unit identification information output from the first control data multiplexing unit 210), error detection code 1 , CLMS1, error detection code 2, CLMS2, error detection code 3, CLMS3, error detection code 4, CLMS4, and error detection code 5 are output to radio section 201 in this order. The data string output to the radio unit 401 is converted into a radio signal having a frequency for a control signal by the control slot and transmitted. When the transmission of the CLMS message is completed, the control unit 230 controls to return to the state of transmitting the control signal shown in FIG. 26 in the control slot after the next frame.

  Next, the operation when the communication of the CLMS message for notifying the window state is not successful once will be described with reference to FIG. FIG. 23 shows an operation example in which a window state change is notified by retransmitting the CLMS message for window state notification. In this example, the window sensor slave unit 40 retransmits the window state notification CLMS message when a reception response cannot be received from the parent unit within four frames after transmitting the window state notification CLMS message. When receiving the window status notification CLMS message, base unit 20 then continuously transmits a reception response every frame.

  In the example of FIG. 23, the operation from the change of the window state of the window sensor slave unit 40 to the first frame 5 for transmitting the CLMS message is the same as that in FIG. In the example of FIG. 23, the operation is performed when the CLMS message transmitted in the slot: 13 of the frame 4 does not reach the parent device 20. If the CLMS message does not reach the master unit 20, the master unit 20 also transmits a normal control signal for the next frame 5. The window sensor slave unit 40 waits for a reception response from the master unit from frame 5 to frame 9 after the CLMS message is transmitted. When the window sensor slave unit 40 cannot receive a reception response even in the slot 9 of the frame 9, the window sensor slave unit 40 retransmits the CLMS message in the slot 9 of the frame 9.

  The CLMS message transmitted at the slot: 13 of the frame 9 is normally received by the parent device 20, and the parent device 20 starts to transmit the reception response from the frame 10 at the transmission slot of the control signal, that is, the slot: 1. At this time, the base unit 20 operates to transmit a reception response a plurality of times in a frame for transmitting an NT message in order to improve communication quality in consideration of occurrence of a reception error. In the example of FIG. A reception response is transmitted in frame 11.

  In the example of FIG. 23, the window sensor slave unit 40 shows that a reception error has occurred at Slot: 1 of frame 10 and a reception response transmitted from the master unit 20 has been received at Slot: 1 of frame 11. The window sensor slave unit 40 that has received the reception response at slot 1 of frame 11 recognizes that the window state change information has been received by the base unit 20 by this reception response, and stops the operation of notifying the window state change. Then, it shifts to a state in which the reception signal of the control signal is received at a cycle of 10 msec in which reception is performed at Slot: 1. The reception frequency at the time of carrier sense at Slot: 13 and the transmission frequency of the CLMS message are both the same as the reception frequency of the control signal at Slot: 1.

  Next, the operation in which the master unit 20 notifies the monitor slave unit 30 that the CLMS message including the window state sent from the window sensor slave unit 40 has been received will be described. The notification from the master unit 20 to the monitor slave unit 30 uses the PT message of the control signal transmitted in the control slot, similarly to the notification of the outside line incoming message. That is, when receiving the CLMS message for notifying the window state from the window sensor slave unit 40, the control unit 230 of the base unit 20 receives a PT message for notifying the window state of the window sensor slave unit 40 (hereinafter referred to as a window state notification message). Is written into the PT message buffer of the first control data multiplex unit 210. This window state notification message is output to the wireless unit 201 and transmitted at a timing when the frame number is a multiple of 16.

  On the other hand, the monitor slave unit 30 is receiving in the idle state at a timing at which the frame number is a multiple of 16. The window state notification message is received by the wireless unit 301 and output to the frame processing unit 202 in the same manner as the outside line incoming message. Is done. Then, the data received in the area of the control data 1 shown in FIG. 4 by the frame processing unit 202, that is, the window state notification message is extracted and output to the control unit 330. When the control unit 330 receives the window state notification message, the control unit 330 controls the display unit 323 to display a change in the state of the window by, for example, ringing a ringer sound. Since the window state notification message is transmitted as a PT message as a part of the control signal, the window sensor slave unit 40 that waits for reception of a reception response can also be received. When the window sensor slave unit 40 receives the window state notification message before receiving the reception response from the master unit 20, the power supply to the communication block 400 cuts off the supply in the same manner as when the reception response is received, It is also possible to control to return to the normal state.

  Next, an operation in which the parent device 20 transmits a message for notifying the sensor child device 20 of the warning mode setting will be described. The message for notifying the alarm mode setting is the same as the operation for sending a message for notifying the reception response to the window sensor slave unit 40 when the CLMS message for notifying the window state is received from the window sensor slave unit 40. It is transmitted to the slave unit 40. That is, the message for notifying the warning mode setting is a CLMS message for notifying the window state from the window sensor slave unit 40, except that the frame number is transmitted by selecting a frame number obtained by adding 1 to a multiple of 2048. When receiving, an operation for sending a message notifying the reception response to the window sensor slave unit 40 is an operation for sending a message notifying the alert mode setting instead of the message notifying the reception response. In addition, every time the setting of the alert mode is changed from the operation unit 224, the base unit 20 notifies the set state to the window sensor slave unit 40, and until a reception confirmation message is received from the window sensor slave unit 40, The window sensor slave unit 40 is notified of the state where the frame number is set in a frame obtained by adding 1 to a multiple of 2048.

  Next, the operation when the sensor slave unit 20 receives a message notifying the alert mode setting will be described. When the sensor slave unit 20 receives the warning mode setting message, the sensor slave unit 20 notifies the warning mode setting by the connectionless communication method, similarly to the case where the window state notification is transmitted to the master unit 20 by the connectionless communication method. A confirmation message is sent to notify that the message has been received. That is, when the sensor slave unit 20 receives a message notifying the alarm mode setting during intermittent reception, the control unit 430 writes the notified alarm mode setting to the EEPROM 422 and receives one slot after 12 slots of the received slot. Then, a reception confirmation message is transmitted, and a power off signal is output to the power control unit 441. Then, the power supply of the wireless block 400 is cut off and the state returns to the intermittent reception state. When the alarm mode is set to ON, the sensor slave unit 20 changes from a closed state to an open state, and when power is supplied to the wireless block 400, the wireless block 400 is turned off. Until the alarm unit 423 emits a warning sound to notify the surroundings that the window has been opened.

  Next, the operation when the window sensor slave unit 40 becomes unable to receive the control signal of the master unit 20 will be described. When the reception timing comes in the intermittent reception state and reception is started, the window sensor slave unit 40 receives the control signal of the master unit by performing reception at a period of 10 msec when the control signal of the master unit cannot be received. Continue. When the control signal cannot be received for a certain period of time, an operation for recapturing the control signal of the master unit is started. That is, if the reception failure of the control signal of the master unit continues in the intermittent reception state of Step 5 shown in FIG. 18, the window sensor slave unit 40 operates to return to the master unit search of Step 1. Then, the base unit search is started, and if the control signal of the base unit 20 cannot be supplemented within a certain time, the control unit 430 writes information indicating that it is out of service in the state storage unit 445, and the timer unit 442. A timer value corresponding to the parent device search cycle is set in, and a power off signal is output to the power controller 441. When the power-off signal is input, the power controller 441 outputs a switching signal that turns off the switch 440, and the switch 440 cuts off the supply of power to the communication block 400 according to the switching signal.

  When the timer corresponding to the parent device search cycle expires, a power-on signal is output from the timer unit 442 to the power control unit 441, power is supplied to the communication block 400, and the control unit 430 starts operation. The control unit 430 checks the power supply control unit 441 when the operation is started, and when the control unit 430 recognizes that the power-on factor is the expiration of the timer, the control unit 430 reads the state storage unit 445 and writes information indicating that it is out of service area. The operation starts from the parent machine search in Step 1 shown in FIG. If the control signal of the master unit 20 cannot be captured again within a predetermined time, a timer value corresponding to the master unit search cycle is set in the timer unit 442 and a power-off signal is output to the power control unit 441. Thereafter, until the control signal of the parent device is supplemented, the wireless block 400 is turned off and the parent device search of Step 1 is repeated according to the parent device search cycle.

  Next, the operation of repeating the master search while changing the ratio of the master search time and the power-off time of the wireless block 400 will be described. When the window sensor slave unit 40 supplements the parent unit in the Step 1 master unit search, the window sensor slave unit 40 clears the storage area of the number of consecutive failures of the EEPROM base unit search to zero. On the other hand, if the control signal of the parent device 20 cannot be supplemented within a certain time in the parent device search in Step 1, the value of the storage area of the number of consecutive failures of the parent device search of the EEPROM is incremented, and the timer unit 442 stores the EEPROM. A timer value corresponding to the stored base unit search cycle corresponding to the number of consecutive base unit searches is set, and a power off signal is output to the power control unit 441. That is, control is performed so that the timer value of the parent device search cycle becomes longer as the number of consecutive failures of the parent device search stored in the EEPROM increases. In addition, there is a method of performing control so that the time limit for searching for a parent device is shortened as the number of consecutive failures increases in accordance with the number of consecutive failures of the parent device search stored in the EEPROM in the parent device search in Step 1.

  As described above, in the first embodiment, one master unit 20, three monitor slave units 30 (A to C), three window sensor slave units 40 (A to C), and two power sensor slave units. 50 (A, B) Although the example of the radio | wireless communications system 10 comprised by the radio | wireless communication apparatus by the one entrance cordless handset 60 was shown, in this invention, the radio | wireless communication apparatus which provides another service, for example, wireless It is possible to construct a system corresponding to the intermittent reception interval according to the service of the camera and the wireless fire alarm.

  In addition, when a wireless door phone having a plurality of entrance cordless units that perform intermittent reception at a period of 2.54 seconds described in the embodiment in a conventional system with a fixed intermittent reception timing is constructed, Even if the monitor of the machine is activated at the same time, the calling of the entrance child machine is performed sequentially at a cycle of 2.54 seconds. On the other hand, using the present invention, as an extension of the first embodiment, when the entrance slave unit 60 is accommodated in a plurality of systems, the standby timing of the entrance slave unit is shifted like the power sensor slave unit. As a result, when calling multiple entrance cordless handsets simultaneously, it is possible to call at the same time with the difference in standby timing, and the responsiveness is improved and the convenience is improved compared to a system with a fixed intermittent reception timing. is there.

(Embodiment 2)
A radio communication system and a radio communication apparatus according to Embodiment 2 of the present invention will be described with reference to the drawings. FIG. 24 shows the configuration of radio communication system 100 according to the second embodiment of the present invention. As shown in FIG. 24, the radio communication system 20 of the second embodiment is a radio communication system in which a repeater 80 is added to the radio communication system 10 of the first embodiment. Note that the base unit 20, the monitor slave unit 30, the window sensor slave unit 40, the power sensor slave unit 50, and the entrance slave unit 60 constituting the wireless communication system 100 are described in the embodiment except for the operations, functions, and operations described below. 1 is the same as that described in FIG.

  First, the repeater 80 shown in FIG. 24 will be described. The repeater 80 is a wireless communication device that relays wireless communication between the master unit 20 and the window sensor slave unit A40. The repeater 80 also receives a control signal transmitted from the master unit 20, and Frame and slot synchronization is maintained and control signals are transmitted. However, the repeater 80 also transmits a control signal, and the control signal transmitted by the repeater 80 is transmitted with the configuration shown in FIG. 5 in the same manner as the control signal transmitted from the parent device 20. However, the base unit identification code of the control signal transmitted by the repeater 80 transmits an identification code associated with the base unit identification code to indicate that the base unit 20 is relayed. As the frame number and slot number transmitted in the QT message and the second field, numbers corresponding to the frame and slot timings determined by the base unit 20 are transmitted. For example, when the base unit 20 transmits a control signal in the slot number 1 (Slot: 1) and the repeater transmits a control signal in the next slot, the repeater is notified by the control signal transmitted in the frame N. The frame number is N and the slot number is 2.

  The repeater 80 transmits PT messages, QT messages, and NT messages in accordance with the PT, NT, and QT transmission rules in the multiframe control described in the first embodiment. Accordingly, when receiving a PT message from the parent device, the relay 80 transmits the same PT message in the same frame or a frame after 16 frames. When the relay 80 receives the connectionless communication message shown in FIG. 6 from the base unit 20, it transmits the message sent in the second field in the same frame or a frame after two frames.

  Next, with respect to the parent device 20 shown in FIG. 24, portions different from the parent device 20 of the first embodiment will be described. When the repeater is registered in the wireless communication system, the base unit 20 transmits the connectionless communication message addressed to the dependent station relayed by the registered repeater using the frame number described in the first embodiment. In addition to the transmission of the same message, the same message is transmitted when the number of frames goes back from the transmission frame with the frame number described in the first embodiment by the number of frames that matches the number of frames delayed in the repeater. To work.

  That is, as shown in FIG. 24, when the repeater 80 relays a radio signal between the master unit 20 and the window sensor slave unit A40, the master unit 20 is in a warning mode for transmitting to the window sensor slave unit A40 by connectionless communication. The setting state notification is transmitted twice with a frame number obtained by adding 1 to a multiple of 2048 and a frame obtained by subtracting 1 from a multiple of 2048 two frames before.

  FIG. 25 shows a first example of the operation when the relay device 80 relays the control signal transmitted from the parent device 20 and the window sensor slave device 40 receives the contents of the control signal. FIG. 25 shows a case where the relay 80 transmits a connectionless communication message with a delay of two frames. As shown in FIG. 25, the base unit 20 transmits a control signal in a specific slot of each frame, and the repeater receives the control signal transmitted from the base unit 20 and transmits the control signal to the window sensor slave unit A40. doing. When transmitting a warning mode setting state notification addressed to the window sensor slave unit, the base unit 20 adds 2 to each of the frames (frame 2049 and frame 4097 in FIG. 25) obtained by adding 1 to a multiple of 2048. The same setting state notification is also transmitted in the previous frame (2047 and frame 4095 in FIG. 25).

  In the first example of FIG. 25, the time position of the slot in which the repeater 80 transmits the control signal is located before the time position of the slot in which the master unit 20 transmits the control signal. For example, the slot in which the base unit 20 transmits a control signal is Slot: 2, and the slot in which the repeater 80 transmits a control signal is Slot: 1. In this case, even if the repeater 80 receives the control signal including the warning mode setting state notification in the slot: 2 of the frame 2047, the contents of the control signal cannot be transmitted in the same frame 2047. In this case, the repeater 80 transmits the alert mode setting state notification received in frame 2047 in frame 2049.

  Also, the alert mode setting state notification received in frame 4095 is transmitted in frame 4097.

  In the example of FIG. 25, the content of the control signal received by the repeater 80 in the frame 2047 is transmitted by Slot: 1 in the frame 2049 which is a frame in which the next repeater 80 transmits the control signal. Further, the content of the control signal received by the repeater 80 in the frame 2049 is transmitted by Slot: 1 (not shown) in the frame 2051 which is a frame in which the next repeater 80 transmits the control signal. Further, the content of the control signal received by the repeater 80 in the frame 4095 is transmitted by Slot: 1 in the frame 4097 which is a frame in which the next repeater 80 transmits the control signal.

  Note that the window sensor slave unit performs intermittent reception when the frame number is a frame obtained by adding 1 to a multiple of 2048. That is, in the example of FIG. 25, the window sensor slave unit performs a reception operation at frame 2049, and then performs a reception operation at frame 4097. Therefore, the window sensor slave unit can receive the warning mode setting state notification sent from the repeater 80 in the frame 2049 or the frame 4097.

  FIG. 26 shows a second example of the operation when the relay device 80 relays the control signal transmitted from the parent device 20 and the window sensor slave device 40 receives the contents of the control signal. In the example of FIG. 26, the time position of the slot in which the repeater 80 transmits the control signal is located after the time position of the slot in which the base unit 20 transmits the control signal in the same frame. For example, the slot in which the base unit 20 transmits a control signal is Slot: 2, and the slot in which the repeater 80 transmits a control signal is Slot: 3. In this case, the repeater 80 can transmit a connectionless communication message to the handset side using the same frame.

  In this case as well, when transmitting a warning mode setting state notification addressed to the window sensor slave unit, the base unit 20 adds a frame number to a multiple of 2048 plus 1 (frame 2049 and frame 4097 in FIG. 25), The same setting state notification is also transmitted in the frames two frames before (2047 and frame 4095 in FIG. 25). As shown in FIG. 26, base unit 20 transmits a control signal in each frame specific slot (Slot: 2), and repeater 80 receives the control signal transmitted by base unit 20 at Slot: 2. The repeater 80 transmits the content of the received control signal to the window sensor slave unit A40 using the slot: 3 in the same frame 2049. Further, when receiving the control signal transmitted from the parent device 20 in the frame 4097, the repeater 80 transmits the content of the received control signal to the window sensor slave device A40 in the slot: 3 in the same frame 4097.

  Also in this case, the window sensor slave unit performs intermittent reception when the frame number is a frame number obtained by adding 1 to a multiple of 2048, and the setting state of the alert mode transmitted from the repeater 80 at the frame 2049 and the frame 4097 Receive notifications.

  In the above description, an example in which the relay between the master unit 20 and the window sensor A40 is relayed by one relay 80 is shown, but relaying by a plurality of relays of the master unit 20 and the window sensor A40 is also possible. is there. For example, another other repeater is provided between the window sensor A40 and the repeater 80 of the wireless system 100 shown in FIG. 24, and the first repeater 80 receives the control signal of the master unit 20, and When the control signal transmitted by the second repeater 80 is received by the second repeater and the control signal transmitted by the second repeater is received by the window sensor A40, the master unit 20 has two units. In addition to the control signal transmission frame shown in FIG. 25, a connectionless communication message is transmitted two frames before. That is, base unit 20 has a frame (frame 2049) in which window sensor A40 performs reception by intermittent reception, two frames before (frame 2047), and four frames before (frame 2045: not shown). At this time, a message of connectionless communication to the window sensor A40 is transmitted.

  In the above description, the operation in which the window sensor slave unit A40 receives the control signal of the repeater 80 has been described. However, when the window sensor slave unit A40 is located near the master unit 20, the master unit It is also possible to receive 20 control signals. As shown in FIG. 25 and FIG. 26, in the frame in which the frame number on which the window sensor slave unit A40 waits is a multiple of 2048, both the master unit 20 and the repeater 80 are set in the warning mode to the window sensor slave unit. Sending notifications. When both the control signal transmitted from the repeater 80 and the control signal transmitted from the master unit 20 reach the window sensor slave unit A40, the window sensor slave unit A40 receives control signals from the master unit 20 and the repeater unit 80. It is possible to compare the quality and select the better reception state to perform intermittent reception.

  As described above, base unit 20 of the second embodiment transmits a signal to a dependent station that is intermittently receiving in a plurality of frames according to the delay of repeater 80, so that the dependent station directly controls from the base unit. When a signal is received, a similar reception operation may be performed, and a message transmitted from the parent device can be received via a repeater by performing similar intermittent reception.

(Embodiment 3)
A wireless communication system and a wireless communication apparatus according to Embodiment 3 of the present invention will be described with reference to the drawings. The basic configuration of the wireless communication system according to the third embodiment of the present invention is the same as that of the second embodiment shown in FIG. As shown in FIG. 24, the radio communication system 20 of the present embodiment is a radio communication system in which a repeater 80 is added to the radio communication system 10 of the first embodiment. In addition, points other than the operations, functions, and actions described below of the master unit 20, the monitor slave unit 30, the window sensor slave unit 40, the power sensor slave unit 50, and the entrance slave unit 60 constituting the wireless communication system 100 are implemented. The description is the same as that of the first embodiment, and the description is omitted. The repeater 80 constituting the wireless communication system 100 is the same as that described in the second embodiment, and the description thereof is omitted.

  Next, the sensor slave unit A40 shown in FIG. 24 will be described with respect to parts different from the sensor slave unit A40 of the first embodiment. When the repeater is registered in the wireless communication system, the sensor slave unit A40 is delayed by the control signal transmitted by the master unit 20 in the connectionless communication frame to the sensor slave unit A40 and the repeater 80 during intermittent reception. And operate to receive both control signals of the control signal of the arriving frame. That is, the sensor slave unit A40 performs an intermittent reception operation so as to receive two frames of a frame number obtained by adding 1 to a multiple of 2048 and a frame number obtained by adding 3 to a multiple of 2048.

When base unit 20 transmits a control signal including a warning mode setting status notification in a frame number obtained by adding 1 to a multiple of 2048, repeater 80 cannot transmit a frame having the same number. The notification is transmitted in a frame having a frame number obtained by adding 3 to a multiple of 2048. Accordingly, the control signal transmitted from the repeater 80 reaches the sensor slave unit A40 in a frame obtained by adding 3 to the multiple of 2048. When the sensor slave unit A40 is located near the master unit 20, the control signal transmitted from the master unit 20 is also received by the master unit 20 in a frame having a frame number obtained by adding 1 to a multiple of 2048. The sensor slave unit A40 has a frame number obtained by adding 1 to a multiple of 2048 (frame 2049, frame 4097,...).
In addition, the intermittent reception operation is performed so that the reception operation is performed on a frame (frame 2051, frame 4099,...) Obtained by adding 3 to a multiple of 2048. Therefore, the sensor slave unit A40 correctly receives the warning mode setting state notification even if the received control signal is transmitted from the master unit 20 or transmitted from the repeater 80. can do.

  In addition, by performing the intermittent reception operation of the sensor slave unit A40 as described above, the sensor slave unit A40 has received a frame number obtained by adding 1 to a multiple of 2048 and the alert mode setting state notification is not received. In this case, it is possible to perform a frame reception operation in which the frame number is a multiple of 2048 plus 3.

  In the above description, an example of relaying between the master unit 20 and the window sensor A40 is shown as one relay unit 80, but relaying is performed via a plurality of relay units of the master unit 20 and the window sensor A40. It is also possible. For example, another repeater is provided between the window sensor A40 and the repeater 80 of the wireless system 100 shown in FIG. 24, and the first repeater 80 receives the control signal of the master unit 20, and the first When the second repeater receives the control signal transmitted by the second repeater 80 and the second repeater transmits the control signal, the window sensor A40 considers the delay caused by the two repeaters. Performs intermittent reception. That is, the window sensor A40 performs a reception operation in the frame in which the parent device 20 is transmitting the alert mode setting state notification, the second frame, and the fourth frame after three frames.

  In the above description, the operation in which the window sensor slave unit A40 receives the control signal of the repeater 80 has been described. In this case as well, the window sensor slave unit A40 is located near the master unit 20 as described above. If it is, it is possible to receive the control signal of the master unit 20. When both the control signal transmitted from the repeater 80 and the control signal transmitted from the master unit 20 reach the window sensor slave unit A40, the window sensor slave unit A40 receives control signals from the master unit 20 and the repeater unit 80. It is possible to compare the quality and select the better reception state to perform intermittent reception.

  In addition, the present invention is not limited to this, and various events such as various notification devices that operate depending on the control station, emergency buttons, nurse calls, and device energy management systems that monitor the operating status of various electrical devices are controlled by wireless communication. It can be applied to a device that notifies a station.

  The present invention is useful for a wireless communication apparatus applicable to, for example, a wireless sensor, and can reduce power consumption of a dependent station.

10 wireless communication system 20 parent device 201 wireless unit 202 frame processing unit 220 ROM
221 RAM 221
222 EEPROM
224 Operation unit 30 Monitor slave unit 301 Radio unit 302 Frame processing unit 303 Audio processing unit 321 RAM
322 EEPROM
323 Display unit 324 Operation unit 330 Control unit 40 Window sensor slave unit 421 RAM
422 EEPROM
423 Notification unit 401 Radio unit 430 Control unit 400 Communication block 443 Sensor unit 50 Power sensor 501 Radio unit 502 Frame processing unit 521 RAM
522 EEPROM
550 Control unit 60 Entrance unit 601 Radio unit 601
602 Frame processing unit 603 Audio processing unit 621 RAM
622 EEPROM
623 Camera 630 Control unit 643 Operation unit

Claims (4)

The first other communication apparatus that performs time division multiplex communication in the first frame period that is a dependent station, and time division multiplexing in a second frame period that is an integral multiple of the first frame period that is a dependent station and is different A communication device that is a control station of a second other communication device that performs communication;
Comprising a first control signal for the first other communication apparatus, and a second control signal to the second other communication apparatus, a control unit for transmitting,
The control unit transmits the first control signal at the first frame period from an Nth frame position from a predetermined frame position as a reference, and also from the Mth frame position different from N. The communication apparatus transmits the second control signal at a frame period of two . The controller simultaneously transmits a first control signal to a plurality of first other communication devices that perform time division multiplex communication in the first frame period, and time division multiplex in the second frame period. The communication apparatus according to claim 1, wherein the second control signal is simultaneously communicated to a plurality of second other communication apparatuses that perform communication. The first other communication device according to any one of claims 1 and 2, the second other communication device,
And a communication device which is the control station. The first other communication apparatus that performs time division multiplex communication in the first frame period that is a dependent station, and time division multiplexing in a second frame period that is an integral multiple of the first frame period that is a dependent station and is different A communication method in a communication device that is a control station of a second other communication device that performs communication,
Transmission means for transmitting a first control signal for the first other communication device and a second control signal for the second other communication device;
The transmission means transmits the first control signal at the first frame period from the Nth frame position from a predetermined frame position as a reference, and from the Mth frame position different from N. A communication method, wherein the second control signal is transmitted at a frame period of two.