JP4696714B2 - Wireless communication device - Google Patents

Description

  The present invention relates to a wireless communication system including a wireless communication device that operates as a plurality of control stations and a wireless communication device that operates as a dependent station.

  There is a wireless communication system including a wireless communication device that operates as a plurality of control stations and a wireless communication device that operates as a dependent station. For example, as shown in FIG. 5, a cordless telephone base unit 501 is used as a control station, and a cordless telephone system comprising a cordless telephone handset 502 as a subordinate station, and a doorphone base unit 503 connected to a doorphone 504 are provided. In a wireless door phone system configured as a control station and a door phone slave unit 505 as a dependent station of the door phone master unit 503, the cordless phone master unit 501 is wirelessly operated for the purpose of operating the wireless door phone system as a part of the cordless phone system. By operating the doorphone master unit 503 as a control station of the entire communication system and as a slave station of the cordless phone master unit 501, the cordless phone slave unit 502 and the doorphone slave unit 505 pass through the cordless phone master unit 501 and the doorphone master unit 503. Can communicate with each other. When such a wireless communication system is configured, communication between the cordless telephone handset 502 and the door phone handset 505 becomes possible, and the convenience is enhanced.

  The subordinate station searches for a control signal periodically transmitted from the control station and continuously receives the control signal, thereby maintaining synchronization and enabling wireless communication. Therefore, also in the wireless communication system, the doorphone base unit 503 can search for a control signal periodically transmitted by the cordless telephone base unit 501 and continuously receive it to enable wireless communication.

  When the same cordless telephone system is configured with a plurality of master units, the control signal transmitted from the reference master unit among the plurality of master units is received by the other master unit, and this control signal is received. A device in which a control signal is transmitted from another parent device in synchronization with the timing is known (Patent Document 1).

In addition, there is a timing extraction unit that extracts the timing of the time slot of the public base station in the base station of the digital radio telephone apparatus that has a mobile phone function used outdoors and a cordless telephone function mainly used around the home. In addition, there is known one in which a radiotelephone base unit sets a time slot timing for a radiotelephone slave unit based on the time slot timing of a public base station (Patent Document 2).
JP-A-8-251661 Japanese Patent Laid-Open No. 7-87556

  A cordless telephone master unit that operates as a control station for the entire wireless communication system, a cordless telephone slave unit and a wireless doorphone master unit that operate as a subordinate station of the cordless telephone master unit, and a wireless doorphone parent that operates as a control station in a wireless doorphone system The problem to be solved in the wireless communication system composed of the doorphone slave unit that operates as a subordinate station of the machine and the wireless doorphone master unit is that the wireless doorphone master unit searches for a control signal from the cordless telephone master unit. If the door phone call occurs in the state, the door phone call cannot be transmitted to the door phone slave unit. This is because a function that can be used without inconvenience in a single wireless doorphone system cannot be used because the cordless telephone system and the wireless doorphone system are linked.

  Therefore, in the present invention, when the state of the wireless control unit is in the state of searching for a control signal from another control station, even if an event requiring wireless communication occurs, the state of searching for the control signal It is an object of the present invention to be able to perform control for instructing a subordinate station communication control to a radio control unit corresponding to the event regardless of whether or not the state is continuously received.

The present invention includes a doorphone master unit that operates as a control station or a sub-control station, and a slave unit that can operate as a subordinate station of the cordless telephone master unit that operates as the doorphone master unit or another control station. A wireless communication device in which a handset and the handset perform wireless communication, wherein the doorphone base unit controls the wireless unit to perform wireless communication and the wireless unit to search for a control signal of the cordless telephone base unit A station communication control unit, a radio control unit for controlling the radio unit to perform transmission / reception with the slave unit, a notification unit for informing a call, and outputting a voice of a visitor and inputting a voice of a responder A call unit, an input unit for inputting a call event, an event storage unit for storing a call event, and a main control unit, wherein the control station communication control unit controls the cordless telephone base unit. Continuous signal When a call event is input by the input means during reception, the radio control unit is instructed to call the slave unit, and the notification unit starts notification of a visitor. The main control unit When a call event is input by the input means while the station communication control unit is searching for the control signal of the cordless telephone master unit, the notification unit starts to notify the visitor, and the event is stored in the event storage unit. If the control signal of the cordless telephone base unit cannot be continuously received within a predetermined time, the control unit starts to transmit the control signal to the sub unit and calls the sub unit. It is characterized by.

According to the present invention, when searching for a control signal of a cordless telephone base unit, if a call event is input by the input means, the event is stored in the event storage unit. Therefore, the cordless telephone base unit is stored within a predetermined time. Even when the control signal cannot be continuously received, it is possible to make a call to the slave unit in response to this call event .

  In the present invention, when the state of the wireless control unit is searching for a control signal from another control station, even if an event requiring wireless communication occurs, control corresponding to the event is performed. I made it.

1st invention of this application is provided with the door phone main unit which operate | moves as a control station or a sub-control station, and the subunit | mobile_unit which can operate | move as a subordinate station of the cordless telephone base unit which operate | moves as said door phone main unit or another control station A wireless communication device in which the doorphone master unit and the slave unit perform wireless communication, wherein the doorphone master unit includes a wireless unit that performs wireless communication, and the wireless unit configured to search for a control signal of the cordless telephone master unit. A control station communication control unit that controls the radio, a radio control unit that controls the radio unit so as to perform transmission and reception with the slave unit, a notification unit that performs call notification, and outputs a voice of a visitor and responder A voice input unit, an input unit for inputting a call event, an event storage unit for storing a call event, and a main control unit, wherein the control station communication control unit is connected to the cordless telephone. Control signal of main unit When a call event is input by the input means while continuously receiving the message, the radio control unit is instructed to call the slave unit, and the notification unit starts to notify a visitor, and the main control unit When the call event is input by the input means when the control station communication control unit is searching for the control signal of the cordless telephone master unit, the notification unit starts to notify the customer, If the control signal of the cordless telephone master unit cannot be continuously received within a predetermined time period, the control unit transmits a control signal to the slave unit and starts to send the control signal to the slave unit. It is intended to be called .

Therefore, if an event occurs when the state of the control station communication control unit is in the state of searching for the second device, the search of the second device is stopped and wireless communication with the dependent station is started. and synchronization becomes possible to control corresponding to the event from 0.00, as much as it is possible to perform control corresponding to the event in a state that synchronization is maintained in a wireless communication system.

According to a second aspect of the present invention, when the first device is in a state of searching for the second control signal of the second device, an event requiring wireless communication occurs in the input means. wherein if the first device has not changed in a state of continually receiving said second control signal within a predetermined time from the start of the search of the second control signal the The control according to the event is performed by starting transmission of the first control signal to the third device .

Therefore, even when a call event is generated by the input means when the control station communication control unit searches for the control signal of the cordless telephone master unit, the call event is stored in the event storage unit and within a predetermined time. If there is no change from the state where the cordless telephone master unit's control signal is being searched to the state where it is continuously received, the control signal search is stopped and transmission of the control signal to the slave unit is started. Thus, it is possible to perform control corresponding to an event requiring wireless communication stored in the event storage unit .

A second invention of the present application includes a doorphone master unit that operates as a main control station or a sub-control station, a cordless telephone master unit that operates as a main control station, and a slave unit subordinate to the doorphone master unit or the cordless telephone master unit. The intercom base unit includes: a radio unit that performs radio communication; and a control station communication control unit that controls the radio unit to search for a control signal of the cordless telephone base unit. A radio control unit that controls the radio unit to perform transmission and reception with the slave unit, a notification unit that performs call notification, a call unit that outputs a voice of a visitor and inputs a voice of a responder, An input unit for inputting a call event; an event storage unit for storing a call event; and a main control unit, wherein the control station communication control unit continuously transmits a control signal of the cordless telephone master unit. When receiving When a call event is input by the input means, the radio control unit is instructed to call the slave unit, and the notification unit starts to notify a visitor. The main control unit is connected to the control station communication control unit. When a call event is input by the input means when searching for the control signal of the cordless telephone master unit, the notification section starts to notify the visitor, and the call event is stored in the event storage section in advance. When the control signal of the cordless telephone master unit cannot be continuously received within a predetermined time, the control signal is sent to the slave unit by itself and a call is made to the slave unit. is there.

Therefore , when a doorphone call start event is input by the input means while searching for the control signal of the cordless telephone master unit , the notification section starts to notify the visitor, and the control station communication control section starts the cordless telephone master section. Wireless door phone even when the control signal of the machine changes from the search state to the state of continuous reception, or even when the control signal of the cordless telephone master unit cannot be continuously received within a predetermined time. A door phone call can be made to the slave unit of the system.

(Embodiment)
FIG. 1 is a diagram illustrating a configuration of a wireless communication system according to an embodiment of the present invention. FIG. 2 is a diagram illustrating the configuration of the wireless doorphone master unit and the doorphone according to the embodiment of the present invention. 3 and 4 are sequence charts for explaining the operation of the radio communication system according to the embodiment of the present invention.

  As shown in FIG. 1, the wireless communication system according to the embodiment of the present invention includes a cordless telephone system and a wireless door phone system. The cordless telephone system includes a cordless telephone base unit 101 that is a wireless communication apparatus that operates as a control station of the cordless telephone system, and a cordless telephone handset 102 that is a wireless communication apparatus that operates as a subordinate station of the cordless telephone base unit 101. The The cordless telephone base unit 101 periodically transmits a control signal.

  The wireless doorphone system includes a wireless doorphone base unit 103 that is a wireless communication device that operates as a control station of the wireless doorphone system, a doorphone 104 that includes a communication unit and an operation unit that are wired to the wireless doorphone base unit 103, and It is comprised of a doorphone slave unit 105 that is a wireless communication device that operates as a subordinate station of the wireless doorphone master unit 103. TDMA (time division multiplexing) between the cordless telephone master unit 101 and the cordless telephone slave unit 102, between the wireless doorphone master unit 103 and the doorphone slave unit 105, and between the cordless telephone master unit 101 and the wireless doorphone master unit 103. Communication is performed according to the method.

  Further, the cordless telephone base unit 101 operates as a control station of the entire wireless communication system, and the wireless doorphone base unit 103 operates as a subordinate station of the cordless telephone base unit 101. With such a configuration, the cordless telephone system and the wireless door phone system can communicate with each other. As a result, communication between the cordless telephone handset 102 and the doorphone handset 105 is possible, and the dual handset 106 that can be a subordinate station of the cordless telephone base unit 101 and a subordinate station of the wireless doorphone base unit 103 is provided. If there is one, it is possible to directly become a child device of the parent device of both systems, so the convenience is further enhanced.

  As shown in FIG. 2, the wireless doorphone master unit 103 is connected to the doorphone 104 by wire. For example, the door phone 104 is usually attached to the outer wall or gate pole of the entrance, and is connected to the wireless door phone master unit 103 in the house via indoor or outdoor wiring. The wireless intercom base unit 103 includes a control signal detection unit 202, a control signal search timer unit 203, a door phone call event storage unit 204, a data reception unit 205, a control signal transmission unit 207, and a data transmission unit 208. A radio control unit, a radio unit 201, a main control unit 206, a notification unit 209, a doorphone master unit operation unit 210, and a doorphone master unit call unit 211 are configured. The door phone 104 includes a door phone operation unit 212 and a door phone call unit 213. The radio unit 201 performs modulation / demodulation to perform TDMA (Time Division Multiplexing) communication, and transmits and receives via an antenna. The main control unit 206 controls the entire wireless doorphone master unit, and notifies the doorphone 104 between the doorphone 104 and the wireless doorphone master unit 103 or between the doorphone 104 and the doorphone slave unit 105 via the wireless doorphone master unit 103. Controls calling, answering and talking.

  The control signal search timer unit 203 starts the control signal search timer when a control signal search timer start notification is input from the control signal detection unit 202 while the control signal search timer is not operating, and the control signal search timer operates while the control signal search timer is operating. When a search timer stop notification is input, the control signal search timer is stopped. For example, when the radio intercom base unit 103 is activated, the control signal search timer unit 203 causes the radio unit 201 to start control signal search processing, and at the same time, the control signal search timer unit 203 calls a control signal search timer (hereinafter referred to as a search timer). ).

  When the control signal detection unit 202 detects a control signal transmitted from the cordless telephone base unit 101 from the received signals received via the wireless unit 201, the control signal detection unit 202 outputs a search timer stop notification to the control signal search timer unit 203, Further, a control signal detection success notification is output to the control signal transmission unit 207. Further, the search timer continues counting while the control signal is not detected from the received signals received via the wireless unit 201. While the control signal search timer is being activated (counting), the radio unit 201 continues the control signal search process.

  When a control signal search timer stop notification is input while the control signal search timer is operating, the control signal search timer unit 203 outputs a control signal search success notification to the door phone call event storage unit 204. When the control signal search timer value reaches a predetermined control signal search timer expiration value without receiving the control signal search timer stop notification, the control signal search timer unit 203 outputs a control signal search failure notification to the door phone call event storage unit 204 To do.

  When a doorphone call signal is issued by operating the doorphone operation unit 212 on the doorphone 104, a doorphone call event is input to the doorphone call event storage unit 204 via the main control unit 206, and the doorphone call event storage unit 204 is input. Stores information on a doorphone call event.

  At a certain time, for example, when a visitor operates the door phone operation unit 212 of the door phone 104 and information on the door phone call event is stored in the door phone call event storage unit 204, a control signal search success notification from the control signal search timer unit 203, or When the control signal search failure notification is input, information on the door phone call event stored in the door phone call event storage unit 204 is output to the data transmission unit 208. Accordingly, the data transmission unit 208 transmits doorphone call information from the doorphone 104 via the wireless unit 201.

  The control signal transmission unit 207 transmits a control signal to the doorphone slave unit 105 and the dual-purpose slave unit 106 that are subordinate stations of the wireless doorphone master unit 103. If the control signal transmitted by the nearby cordless telephone base unit 101 can be continuously received, a control signal detection success notification is issued from the control signal detection unit 202 at the same cycle as the control signal transmission period of the cordless telephone base unit 101. It is input to the control signal transmission unit 207. The control signal transmission unit 207 transmits a control signal to the door phone slave unit 105 and the like in synchronization with this control signal detection success notification. Therefore, the control signal transmitted by the control signal transmission unit 207 is synchronized with the control signal received from the cordless telephone base unit 101. This control signal can be received not only by the doorphone slave unit 105 but also by the dual-purpose slave unit 106 or the cordless telephone slave unit 102.

  For example, in a state where the control signal transmitted by the cordless telephone base unit 101 cannot be received, a control signal detection success notification is not input to the control signal transmission unit 207, and in this state, the control signal transmission unit 207 stops transmitting the control signal.

  In addition, when a control signal search failure notification is input from the control signal search timer unit 203, transmission of the control signal is started at a timing unique to the wireless doorphone master unit 103. That is, when the control signal of cordless telephone base unit 101 is not received (the control signal search timer stop notification is not received) and the value of the search timer reaches a predetermined control signal search timer expiration value, control signal search timer unit 203 A control signal search failure notification is issued, and the control signal transmission unit 207 starts transmission of a control signal at a timing unique to the wireless doorphone master unit 103 according to the notification.

  The data reception unit 205 performs reception data processing addressed to the wireless intercom base unit 103 from the reception signal and outputs the reception data to the main control unit 206. This received data includes the door phone call response received when the responder performs a response operation on the door phone slave unit 105, the subsequent voice from the door phone slave unit 105, and the like.

  The data transmission unit 208 inputs the doorphone call and voice from the doorphone 104 via the main control unit 206, performs transmission data processing, and transmits the data via the wireless unit 201. In addition, when a door phone call event is input from the door phone call event storage unit 204, transmission data processing is performed in the same manner and the data is transmitted via the wireless unit 201.

  When the door phone call from the door phone 104 is input via the main control unit 206, the notification unit 209 notifies the speaker provided in the door phone master phone call unit 211.

  The doorphone master unit operation unit 210 includes a response button. When the notification unit 209 notifies the doorphone call, the responder presses the response button, so that the main control unit 206 and the doorphone call unit 213 of the doorphone 104 and the wireless doorphone It is possible to make a call between the doorphone base unit call unit 211 of base unit 103.

  The intercom base phone call unit 211 includes a speaker and a microphone, and has a function of allowing a responder to make a call with the doorphone call unit 213 of the doorphone 104 via the main control unit 206.

  The door phone operation unit 212 includes a call button, and when a visitor presses the call button, the door phone operation unit 212 outputs a door phone call to the wireless door phone master unit 103.

  The door phone call unit 213 includes a speaker and a microphone, and has a function of allowing a visitor to respond and make a call via the main control unit 206.

  The operation of the wireless communication system according to the embodiment of the present invention configured as described above will be described.

  First, when the wireless doorphone base unit 103 or the cordless telephone base unit 101 is just turned on, when the wireless doorphone base unit 103 is temporarily out of the communication range of the cordless telephone base unit 101, or when an interference source, fading, etc. When the control signal from the cordless telephone base unit 101 cannot be received due to the change in the wireless environment, the wireless doorphone base unit 103 performs the following operation.

  Immediately after the wireless doorphone master unit 103 is turned on, the control signal detection unit 202 issues a control signal timer start notification, and the control signal search timer unit 203 that receives the control signal timer start notification from the control signal detection unit 202 The timer is started and the wireless unit 201 is set to the control signal search state. When the wireless unit 201 is in the control signal search state, the wireless unit 201 performs continuous reception, and the control signal search timer unit 203 controls the wireless unit 201 until a control signal search timer stop notification is input from the control signal detection unit 202. Keep the search state.

  When the control signal detection unit 202 detects the control signal from the cordless telephone master unit 101 via the wireless unit 201 in the control signal search state, it outputs a control signal search timer stop notification to the control signal search timer unit 203, A control signal detection success notification is output to the control signal transmission unit 207. The control signal search timer unit 203 that has input the control signal search timer stop notification during the control signal search timer operation stops the control signal search timer and sets the control signal search state of the wireless unit 201 that is continuously receiving the cordless signal. The state is changed to a synchronization maintaining state where the control signal can be received in synchronization with the control signal periodically transmitted by the telephone base unit 101. The control signal transmission unit 207 having received the control signal detection success notification receives the radio unit 201 from the doorphone slave unit 105 and the dual-purpose slave unit 106 on the TDMA slot other than the TDMA slot including the control signal received from the cordless telephone master unit 101. A control signal is transmitted via By operating in this way, the wireless doorphone base unit 103 is synchronized with the cordless telephone base unit 101. In this state, the doorphone slave unit 105 and the dual-purpose slave unit 106 are synchronized with the wireless doorphone master unit 103, and as a result, the entire wireless communication system is synchronized with the cordless telephone master unit 101.

  Next, when the entire wireless communication system is synchronized with the cordless telephone base unit 101, the following wireless communication is possible.

  A visitor presses the call button of the door phone operation unit 212 of the door phone 104 and outputs a door phone call to the main control unit 206. The main control unit 206 that has input the door phone call outputs the door phone call to the notification unit 209 and the data transmission unit 208. The notification unit 209 that has input the door phone call starts notification. At the same time, the data transmission unit 208 that has input the doorphone call transmits the doorphone call notification to all the slave units under the wireless doorphone system via the wireless unit 201 on the empty TDMA slot. For example, the door phone slave unit 105 that has received the door phone call notification sounds a ring tone using a speaker or a bell. When the responder presses the response button of the door phone slave unit 105, the door phone slave unit 105 first establishes a communication slot for talking with the wireless door phone master unit 103 on an empty TDMA slot.

  When the communication slot is established, door phone slave unit 105 transmits a door phone slave unit response to wireless door phone master unit 103. The data receiving unit 205 that has received the intercom slave unit response via the wireless unit 201 outputs the intercom slave unit call response to the main control unit 206. The main control unit 206 that has input the doorphone slave unit call response connects the doorphone call unit 213 of the doorphone 104 and the data receiver unit 205 to connect the doorphone slave unit 105 and the doorphone 104 via the wireless doorphone master unit 103. You can talk on the phone.

  Next, when the wireless doorphone base unit 103 is searching for a control signal transmitted from the cordless telephone base unit 101 and the synchronization between the wireless doorphone base unit 103 and the cordless telephone base unit 101 is not established, the customer is visited. The operation when the person presses the call button of the door phone operation unit 212 of the door phone 104 will be described separately in the following two cases.

[Receive control signal before control signal search timer expires]
First, as shown in FIG. 3, a case where a control signal from the cordless telephone base unit 101 can be received before the control signal search timer expires will be described.

  When the wireless doorphone base unit 103 is out of synchronization, that is, when the control signal sent from the cordless telephone base unit 101 via the wireless unit 201 in the synchronization maintaining state cannot be detected by the control signal detection unit 202, The control signal detection unit 202 outputs a control signal search timer activation notification to the control signal search timer unit 203.

  In this case, since the control signal detection unit 202 does not output a control signal detection success notification to the control signal transmission unit 207, the control signal transmission unit 207 transmits a control signal to the doorphone slave unit 105 or the dual-purpose slave unit 106. No longer. As a result, the synchronization of the wireless door phone system cannot be maintained. As described above, the control signal search timer unit 203 that has received the control signal search timer start notification while the control signal search timer is not operating starts the control signal search timer and puts the radio unit 201 into the control signal search state. In this control signal search state, the radio unit 201 performs continuous reception, and maintains the control signal search state until instructed by the control signal search timer unit 203 to enter the synchronization maintenance state.

  In this control signal search state (asynchronous with the wireless doorphone master unit 103 and before the control signal search timer expires), when the visitor presses the call button of the doorphone operation unit 212 of the doorphone 104, the main control unit 206 calls the doorphone. The door phone call is output to the notification unit 209 and the door phone call event storage unit 204 stores the door phone call event. In wireless doorphone base unit 103 itself, notification unit 209 that has input the doorphone call starts notification.

  When the control signal detection unit 202 detects the control signal from the cordless telephone base unit 101 via the wireless unit 201, the control signal detection unit detects the control signal if it is before the control signal search timer expires (during timer operation). 202 outputs a control signal search timer stop notification to the control signal search timer unit 203, and further outputs a control signal detection success notification to the control signal transmission unit 207. When the control signal search timer stop notification is input during the timer operation, the control signal search timer unit 203 stops the control signal search timer, outputs a control signal search success notification to the door phone call event storage unit 204, and performs continuous reception. The control signal search state of the wireless unit 201 is changed to a synchronization maintaining state in which the control signal can be received in synchronization with the control signal periodically transmitted by the cordless telephone base unit 101.

  The control signal transmission unit 207 having received the control signal detection success notification receives the radio unit 201 from the doorphone slave unit 105 and the dual-purpose slave unit 106 on the TDMA slot other than the TDMA slot including the control signal received from the cordless telephone master unit 101. A control signal is transmitted via After that, the door phone call event storage unit 204 having received the control signal search success notification outputs the door phone call event stored in advance to the data transmission unit 208. The data transmission unit 208 that has input the doorphone call event transmits a doorphone call notification to all the slave units under the wireless doorphone system via the wireless unit 201 on the empty TDMA slot.

  After the control signal can be received from the cordless telephone base unit 101 in this way, the wireless doorphone base unit 103 is synchronized with the cordless telephone base unit 101, and the doorphone handset 105 and the combined handset 106 are connected to the wireless doorphone base unit 103. As a result, the entire wireless communication system is synchronized with the cordless telephone base unit 101 as a result, and the doorphone call notification can be transmitted to all the handset units under the wireless doorphone system on the empty TDMA slot.

  For example, the doorphone slave unit 105 (shown in FIG. 3) that has received the doorphone call notification sounds a ringing tone using a speaker or a bell. When the responder presses the response button of the door phone slave unit 105, the door phone slave unit 105 first establishes a communication slot for talking with the wireless door phone master unit 103 on an empty TDMA slot. When the communication slot is established, door phone slave unit 105 transmits a door phone slave unit response to wireless door phone master unit 103.

  In the wireless doorphone base unit 103, the data receiving unit 205 that has received the doorphone slave unit response via the wireless unit 201 outputs a doorphone slave unit call response to the main control unit 206. The main control unit 206 that has input the doorphone slave unit call response connects the doorphone call unit 213 of the doorphone 104 and the data receiver unit 205 to connect the doorphone slave unit 105 and the doorphone 104 via the wireless doorphone master unit 103. You can talk on the phone.

[Search timer expires without receiving control signal]
Next, a case where the control signal search timer has expired in a state where the control signal from the cordless telephone base unit 101 cannot be received as shown in FIG. 4 will be described.

  When the control signal detection unit 202 cannot detect the control signal periodically transmitted by the cordless telephone base unit 101 via the wireless unit 201 in the synchronization maintaining state, the wireless doorphone base unit 103 can detect the control signal. Outputs a control signal search timer activation notification to the control signal search timer unit 203. In this case, since the control signal detection unit 202 does not output a control signal detection success notification to the control signal transmission unit 207, the control signal transmission unit 207 transmits a control signal to the doorphone slave unit 105 or the dual-purpose slave unit 106. No longer. As a result, the synchronization of the wireless door phone system cannot be maintained. When the radio doorphone system is out of synchronization, the control signal search timer unit 203 starts the search timer according to the control signal search timer start notification, and puts the radio unit 201 into the control signal search state. As a result, the wireless unit 201 starts continuous reception and maintains the control signal search state until the control signal search timer unit 203 instructs to enter the synchronization maintenance state.

  In this control signal search state, when a visitor presses the call button of the door phone operation unit 212 of the door phone 104, the main control unit 206 inputs the door phone call, outputs the door phone call to the notification unit 209, and also calls the door phone call event. The storage unit 204 stores the door phone call event. The notification unit 209 that has input the door phone call starts notification.

  When the control signal search timer expires without the control signal detection unit 202 being able to detect the control signal from the cordless telephone base unit 101 via the wireless unit 201, the control signal search timer is stopped, and the control signal search timer unit 203 A control signal search failure notification is output to the paging event storage unit 204, a control signal search failure notification is output to the control signal transmission unit 207, and the control signal search state of the wireless unit 201 performing continuous reception is changed to the single control signal transmission state. change.

  Upon receiving the control signal search failure notification, the control signal transmission unit 207 starts transmitting a control signal to the doorphone slave unit 105 and the dual-purpose slave unit 106 at the TDMA slot timing unique to the wireless doorphone master unit 103 via the radio unit 201. By operating in this way, the doorphone slave unit 105 and the dual-purpose slave unit 106 are synchronized with the wireless doorphone master unit 103, and as a result, the wireless doorphone system is synchronized independently.

  The door phone call event storage unit 204 having received the control signal search failure notification outputs the door phone call event stored in advance to the data transmission unit 208. The data transmission unit 208 that has input the doorphone call event transmits a doorphone call notification to all the slave units under the wireless doorphone system via the wireless unit 201 on the empty TDMA slot.

  For example, the door phone slave unit 105 that has received the door phone call notification sounds a ring tone using a speaker or a bell. When the responder presses the response button of the door phone slave unit 105, the door phone slave unit 105 first establishes a communication slot for talking with the wireless door phone master unit 103 on an empty TDMA slot. When the communication slot is established, door phone slave unit 105 transmits a door phone slave unit response to wireless door phone master unit 103.

  In the wireless doorphone master unit 103, the data receiving unit 205 that has received the doorphone slave unit response via the wireless unit 201 outputs a doorphone slave unit call response to the main control unit 206. The main control unit 206 that has input the doorphone slave unit call response connects the doorphone call unit 213 of the doorphone 104 and the data receiver unit 205 to connect the doorphone slave unit 105 and the doorphone 104 via the wireless doorphone master unit 103. You can talk on the phone. Further, the wireless unit 201 that detects the end of the call shifts from the single control signal transmission state to the control signal search state. As a result, the control signal search state is repeated until the control signal from the cordless telephone base unit 101 is received. When the control signal is finally received from the cordless telephone base unit 101, the synchronization is maintained and normal operation is possible. .

  As mentioned above, although embodiment of this invention has been described, this invention is not limited to embodiment.

  In this embodiment, only one wireless doorphone master unit and one cordless telephone master unit are provided. However, a plurality of wireless doorphone master units and cordless phone master units may be provided. In this case, one cordless telephone base unit a is used as a control station for the entire wireless communication system, and the other wireless doorphone base unit and the cordless telephone base unit are operated as subordinate stations of the cordless telephone base unit a.

  In the present embodiment, an example in which the cordless telephone base unit is a control station of the entire wireless communication system and the wireless doorphone base unit is a dependent station of the entire wireless communication system is shown. The cordless telephone base unit may be a dependent station of the entire wireless communication system, and the doorphone base unit may be a control station of the entire wireless communication system.

  The present invention can be widely applied to a wireless communication system having two control stations. For example, the same wireless equipment in which one of two cordless telephone master units is a control station and the other is a subordinate station. The present invention can also be applied to a wireless communication apparatus such as a wireless LAN other than a configuration having a plurality of wireless LANs, a cordless telephone, and a wireless door phone.

  The present invention is inherent in a wireless communication system in which a plurality of control stations exist, even if synchronization of the entire wireless communication system cannot be maintained, and individual wireless communication systems are synchronized independently as necessary. This is suitable for a radio communication system in which a control station and a dependent station communicate with each other by time division multiplexing.

The figure explaining the structure of the radio | wireless communications system which concerns on embodiment of this invention The figure explaining the structure of the radio | wireless doorphone main unit and doorphone which concern on embodiment of this invention The sequence chart explaining operation | movement of the radio | wireless communications system which concerns on embodiment of this invention The sequence chart explaining operation | movement of the radio | wireless communications system which concerns on embodiment of this invention The figure which shows the structure of the radio | wireless communications system provided with the cordless telephone system and the wireless door phone system

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Cordless telephone main | base station 102 Cordless telephone subunit | mobile_unit 103 Radio | wireless door phone main | base station 104 Door phone 105 Door phone subunit | mobile_unit 106 Combined subunit | mobile_unit 201 Radio | wireless part 202 Control signal detection part 203 Control signal search timer part 204 Main control unit 207 Control signal transmission unit 208 Data transmission unit 209 Notification unit 210 Doorphone base unit operation unit 211 Doorphone base unit call unit 212 Doorphone operation unit 213 Doorphone call unit

Claims (4)

A doorphone master unit that operates as a control station or a sub-control station, and a slave unit that can operate as a subordinate station of the cordless telephone master unit that operates as the doorphone master unit or another control station. A wireless communication device for wireless communication
The doorphone master unit is
A wireless unit for performing wireless communication;
A control station communication control unit for controlling the radio unit to search for a control signal of the cordless telephone master unit;
A wireless control unit that controls the wireless unit to perform transmission and reception with the slave unit;
An informing unit for informing a call;
A call unit that outputs the voice of the visitor and the voice of the responder ,
An input means for inputting a call event;
An event storage unit for storing call events;
With a main control unit,
When the call event is input by the input means when the control station communication control unit is continuously receiving the control signal of the cordless telephone base unit, the main control unit is And informing the visitor at the notification unit,
When the call event is input by the input means when the control station communication control unit is searching for the control signal of the cordless telephone master unit, the main control unit starts notifying the visitor by the notification unit, The event is stored in the event storage unit, and when the control signal of the cordless telephone master unit cannot be continuously received within a predetermined time, transmission of the control signal to the slave unit is started independently. A wireless communication apparatus that makes a call to the slave unit . When the doorphone master unit does not change to the state in which the control signal of the cordless phone master unit is continuously received within a predetermined time after the search for the cordless phone master unit is started , The wireless communication apparatus according to claim 1, wherein transmission of a control signal to the slave unit is started . A wireless communication system comprising a doorphone master unit that operates as a main control station or a sub-control station, a cordless phone master unit that operates as a main control station, and a slave unit that is subordinate to the doorphone master unit or the cordless phone master unit. There,
The doorphone master unit is
A wireless unit for performing wireless communication;
A control station communication control unit for controlling the radio unit to search for a control signal of the cordless telephone master unit;
A wireless control unit that controls the wireless unit to perform transmission and reception with the slave unit;
An informing unit for informing a call;
A call unit that outputs the voice of the visitor and the voice of the responder ,
An input means for inputting a call event;
An event storage unit for storing call events;
With a main control unit ,
The main control unit, the call event Ri by said input means is input when the control station communication control unit is continuously receiving the control signal of the cordless telephone base unit, the said radio controller Instructing the call to the slave unit and starting the notification of the visitor at the notification unit,
When the call event is input by the input means when the control station communication control unit is searching for the control signal of the cordless telephone master unit , the main control unit starts notifying the visitor by the notification unit, The call event is stored in the event storage unit, and when the control signal of the cordless telephone master unit cannot be continuously received within a predetermined time, transmission of the control signal to the slave unit is started independently. A wireless communication system for calling the slave unit . When the doorphone master unit does not change to the state in which the control signal of the cordless phone master unit is continuously received within a predetermined time after the search for the cordless phone master unit is started , 4. The wireless communication system according to claim 3, wherein transmission of a control signal to the slave unit is started .

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