JP2007013539A - Wireless communication system and its communication method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce generation of busy states while a wireless intercom and a cordless telephone are operable independently, even when an outside call of the cordless telephone or extension communication and a call of the wireless intercom occur simultaneously, and to reduce deterioration in the communication quality even when notification of the respective calls is available and a subordinate station communicates with any control station. <P>SOLUTION: The wireless communication system comprises: the cordless telephone 3; the wireless intercom 2; and a wireless slave machine 4 in which the control station and the subordinate station communicate with each other by using a time-division communication method. The cordless telephone 3 operates as the control station, whereas the wireless intercom 2 operates as the subordinate station in the communication with the cordless telephone 3, and operates as the control station in the communication with the wireless slave machine 4. The wireless slave machine 4 operates as the subordinate station. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a radio communication system in which a control station and a dependent station communicate with each other by time division multiplexing and a communication method therefor.

  In recent years, the development of wireless technology has been remarkable, and wireless communication devices have become smaller, lighter, and cheaper. Wireless communication devices that use wireless communication have become widespread in communication devices that are used in general households. .

  For example, a typical wireless communication device used in a home is a cordless telephone, and such a cordless telephone is composed of a master unit connected to a public line and one or more slave units. The slave units are connected by wireless communication, and the user can freely carry the slave units, which is highly convenient.

  On the other hand, when the call button of the entrance cordless handset installed at the entrance is pressed, a notification sound is generated from the indoor base unit installed in the room, and a call to the entrance handset is made by pressing the response button of the indoor base unit. That is, doorphones that can talk with visitors are also widely used.

  In order to increase the convenience of this doorphone, a system that can connect the doorphone and the cordless telephone directly or through a relay machine and can handle the doorphone with the cordless telephone has been put into practical use. When the call button of the entrance cordless handset is pressed, the indoor master unit notifies the cordless telephone master unit of the visitor, and the cordless telephone master unit and slave unit notify the incoming doorphone (visitor). When the cordless phone responds with the master and slave units, the voice path with the entrance cordless phone is connected, and the cordless phone master unit or cordless phone call with the entrance cordless device, that is, the call with the visitor is possible. It becomes.

  Furthermore, in connection between the cordless telephone and the doorphone, a technique for connecting the cordless telephone and the doorphone wirelessly is described in Patent Document 1 in order to improve the convenience of installation.

A cordless doorphone system comprising a cordless telephone and a doorphone according to Patent Document 1 is a doorphone provided with a call button and a wireless transmission / reception unit, and receives a call signal from the doorphone in the form of a radio wave signal and makes a call between the doorphone It is configured by combining with a cordless phone provided with a wireless transmission / reception unit that enables a call signal from a door phone in the form of a radio wave signal, and a call can be made between the door phone and the cordless phone base unit and handset. That is, when the call button of the door phone is pressed, the cordless telephone base unit is notified by wireless communication, and the call from the door phone is notified by the cordless telephone base unit and the sub unit in the same manner as the extension call. When the cordless telephone master unit or slave unit responds, a wireless link is established to send an audio signal with the doorphone or an image signal taken by the front cordless handset. Response to is possible.
JP-A-11-136373

  However, in the wireless communication system in which the cordless phone and the doorphone of Patent Document 1 are connected wirelessly, the call from the doorphone can be handled by the cordless phone's base unit or handset using the wireless communication function of the cordless phone. Since the terminal device for responding to the door phone call is a cordless telephone base unit or handset, it has the inconvenience that the cordless telephone cannot be freely replaced.

  In addition, when the cordless telephone is busy with an outside line call or an extension line call, there is a problem in that an incoming call from the door phone cannot be notified.

  In addition, when communicating with a doorphone with a cordless telephone cordless handset, the cordless telephone cordless handset communicates with the doorphone by wirelessly connecting the doorphone and the cordless phone masterphone and wirelessly connecting the cordless telephone cordless handset and the cordless phone cordless handset. In order to communicate with the door phone in the cordless telephone cordless handset, two radio resources are required, and there is an increased risk of communication failure due to a shortage of radio resources and the communication quality due to radio errors in each radio communication As a result, the communication quality between the door phone and the cordless telephone handset tends to deteriorate.

  In the wireless communication system in which the wireless doorphone and the cordless telephone are connected wirelessly, the wireless doorphone and the cordless telephone can operate independently without complicating the scale of the wireless circuit. Even if external line communication or internal line communication and a wireless intercom call occur simultaneously, the occurrence of a busy state due to insufficient radio resources can be reduced, and each call can be notified, so that dependent stations can communicate with any control station. It is an object of the present invention to provide a wireless communication system and a communication method for reducing deterioration in communication quality.

  In the present invention, one of the control station for the wireless doorphone and the control station for the cordless telephone operates as a control station, and at the same time, the control station for the wireless doorphone and the control station for the cordless telephone wirelessly communicate with each other. The main feature is to perform.

  The wireless communication system and the communication method thereof of the present invention operate as a control station at the same time as either the control station of the wireless doorphone or the control station of the cordless telephone using time division multiplex communication, A wireless doorphone control station and a cordless telephone control station perform wireless communication, and operate as a control station and a dependent station in one wireless circuit without complicating the scale of the wireless circuit. Communication between the wireless communication device of the wireless door phone and the cordless telephone is possible, and there is an advantage that the wireless door phone or the cordless telephone can be operated alone.

  In addition, subordinate stations of radio doorphones and cordless telephones receive the respective control stations, and when control stations and subordinate stations of radio doorphones or cordless telephones communicate with each other, each control station and subordinate station communicate directly. The advantage of being able to reduce the occurrence of a busy state due to a shortage of radio resources when an external line communication or an extension line communication of a cordless telephone and a call of a wireless doorphone occur simultaneously, and to notify each call In addition, there is an advantage that it is possible to reduce the deterioration of communication quality when the control station and the subordinate station of the wireless door phone or cordless telephone communicate.

  In a wireless communication system in which a wireless doorphone and a cordless telephone are connected wirelessly, the present invention aims to enable the wireless doorphone and the cordless telephone to operate independently without complicating the scale of the wireless circuit. The control station and the subordinate station are used to configure a cordless telephone and a radio doorphone by a radio communication device that performs radio communication, and each control station operates as a control station and performs radio communication with the subordinate station, and each control station This was realized by operating one of the two as a dependent station of the other and performing wireless communication between the control stations.

  Also, the purpose of reducing the occurrence of busy state due to lack of radio resources when external line communication or extension communication of a cordless telephone and a call of a wireless door phone occur simultaneously, and notification of each call is possible, and the dependent station When communicating with other control stations, the substations of the radio doorphone and cordless telephone receive the respective control stations, and the control station and subordinate station of the radio doorphone or cordless telephone In the case of communication, each control station and dependent stations communicated directly.

  A first invention made to solve the above-described problem is a wireless communication system including a cordless telephone and a wireless doorphone, each of which includes a wireless communication device that performs wireless communication between a control station and a subordinate station. The control station includes a transmission unit that transmits a radio signal, a reception unit that receives a radio signal, and a control unit that controls the entire apparatus, and the control station of the radio intercom includes a transmission unit that transmits a radio signal , Equipped with a receiver for receiving radio signals and a controller for controlling the entire device, one of the control station for the cordless telephone and the control station for the radio intercom operates as the main control station for radio communication with its subordinate stations On the other hand, the other station operates as a sub-station of the main control station and operates as a sub-control station that performs radio communication with the main control station, and the sub-control station operates as a control station that performs communication with its own sub-station. To control It is obtained by the features.

  Communication is performed in a time-division multiplex, and the control station of the cordless telephone and the control station of the wireless doorphone perform wireless communication between the control station of the cordless telephone and the control station of the wireless doorphone by operating one as a subordinate station of the other. Also, the control station of the cordless telephone and the control station of the wireless doorphone perform wireless communication with their subordinate stations, so that communication by wireless communication is possible between the wireless doorphone and the cordless telephone without complicating the scale of the wireless circuit. In addition, the wireless door phone and the cordless telephone can be operated alone.

  A second invention made to solve the above-described problem is characterized in that the sub control station operates as a main control station when it cannot receive a radio signal transmitted by the main control station.

  When the sub-control station cannot receive a radio signal transmitted by the main control station, the sub-control station operates as the main control station, so that the user operates as the main control station from the wireless communication system of the cordless telephone and the radio doorphone of the present invention. When the wireless communication device is replaced with another wireless communication device other than the present invention, the sub control station automatically operates as the main control station and can operate independently, so that the user replaces the wireless communication device with a new one. It is possible to improve convenience. At this time, the old sub-control station that has been switched to the operation of the main control station is also operating as a sub-control station. In other words, it can be used for wireless communication with its own continuous station, and it has the effect of enabling effective use of slots in time division communication.

  According to a third aspect of the present invention, the wireless intercom control station and the cordless telephone control station have input means for registration operation, and register one control station as the other dependent station. Thus, control is performed such that a control station that has registered as a dependent station performs an operation as a sub-control station.

  By registering one control station as the other dependent station, the control station that registered as the dependent station performs the operation as the sub control station, so that it registers and associates the specific cordless phone with the wireless door phone. In addition, when the cordless telephone and the wireless door phone can operate independently by registering or canceling the registration before or after the registration, the cordless telephone can be operated in the master unit (control station). Corresponding to the control station of the cordless phone and the wireless doorphone with the simple operation equivalent to the operation, when the user purchases only one of the cordless phone and the wireless doorphone and later purchases the other, or the cordless phone When one of the wireless doorphones breaks down and is replaced, the wireless communication system can be freely expanded and the convenience is improved. Also, when using a cordless phone or wireless doorphone alone, it operates as a single wireless communication system by setting it to an unregistered state, so it does not operate as a sub control station that receives the main control station. There is an effect that useless operation is eliminated and the start-up when the power is turned on becomes quick.

  According to a fourth aspect of the present invention for solving the above-mentioned problems, time division multiplex communication is performed, a control station transmits a control signal serving as a reference for time division multiplex time, and a dependent station receives a control signal for control. A wireless communication system comprising a cordless telephone and a wireless doorphone comprising a wireless communication device that performs time-division multiplexing time synchronization with a station and performs wireless communication between a control station and a subordinate station. A radio intercom control station comprising: a transmitter that transmits radio signals; a receiver that receives radio signals; a frame processor that performs time division multiplexing control of transmission and reception signals; and a controller that controls the entire apparatus. Includes a transmission unit that transmits a radio signal, a reception unit that receives a radio signal, a frame processing unit that performs time division multiplexing control of transmission and reception signals, and a control unit that controls the entire apparatus. The control department The main control station operates as a main control station that operates at the timing, and the frame processing unit of the main control station operates to transmit a control signal at its own timing, and the other control unit receives a control signal transmitted by the main control station. Controls as a subordinate station that operates at the timing of the main control station and performs wireless communication with the main control station, and controls as a subcontrol station that operates at the reception timing of the control signal transmitted by the main control station. The frame processing unit of the station is characterized in that it operates so as to transmit a control signal in accordance with the reception timing of the control signal transmitted by the main control station.

  The control station of the cordless telephone and the control station of the wireless door phone are operated as one of the other dependent stations and transmit a control signal for time division multiplexing, and the sub control station operating as the other dependent station is the main station. Since the control signal for time division multiplexing is transmitted based on the timing of the control signal transmitted by the control station, the optimal timing relationship of the time division multiplexing for the control signal transmission timing of the main control station and the sub control station The slot can be effectively used in the time division communication.

  A fifth invention made to solve the above-mentioned problems is a wireless communication system comprising a cordless telephone and a wireless doorphone comprising a wireless communication device that performs wireless communication between a control station and a subordinate station. The control station includes a transmission unit that transmits a radio signal, a reception unit that receives a radio signal, and a control unit that controls the entire apparatus, and the control station of the radio intercom includes a transmission unit that transmits a radio signal A receiving unit that receives a radio signal, and a control unit that controls the entire apparatus, and a dependent station that operates as a dependent station of a control station for a cordless telephone and a control station for a wireless intercom is a transmitting unit that transmits a radio signal And a receiving unit that receives a radio signal and a control unit that controls the entire apparatus, and one of the control station of the cordless telephone and the control station of the wireless doorphone serves as a main control station that performs radio communication with its subordinate station. Movement On the other hand, the other station operates as a subordinate station of the main control station and operates as a subcontrol station that performs radio communication with the main control station, and the subcontrol station operates as a control station that communicates with its own subordinate station. The station is controlled to perform wireless communication as a subordinate station of the control station of the cordless telephone and the control station of the wireless door phone.

  One of the control station of the cordless telephone and the control station of the wireless door phone operates as a subordinate station of the other, and the subordinate station of the cordless telephone and the radio doorphone operates as a subordinate station of each control station. The wireless intercom control station, the cordless telephone control station and the subordinate station, and the radio intercom control station and the subordinate station can communicate with each other independently by wireless communication, thereby improving convenience. In addition, since a dependent station can be used as a dependent station of a cordless telephone or a dependent station of a wireless doorphone, when a cordless telephone and a wireless doorphone are installed, the wireless communication device as one dependent station controls both. This makes it possible to communicate with a station, improving convenience, and providing a low-cost wireless communication system including a cordless telephone and a wireless door phone. In addition, it can operate only in the control station and subordinate station of the cordless telephone, or only in the control station and subordinate station of the wireless doorphone. Even when the telephone or the doorphone is replaced with another device, the remaining cordless telephone can be controlled. The station and the dependent station, or the control station and the dependent station of the wireless door phone can operate independently, and there is an effect that there is no waste due to replacement of a part of the wireless communication system.

  A sixth invention made to solve the above-mentioned problems performs time division multiplex communication, wherein the control station transmits a control signal serving as a reference for time division multiplex time, and the subordinate station receives the control signal and performs control. A wireless communication system comprising a cordless telephone and a wireless doorphone comprising a wireless communication device that performs time-division multiplexing time synchronization with a station and performs wireless communication between a control station and a subordinate station. A radio intercom control station comprising: a transmitter that transmits radio signals; a receiver that receives radio signals; a frame processor that performs time division multiplexing control of transmission and reception signals; and a controller that controls the entire apparatus. Includes a transmitter that transmits radio signals, a receiver that receives radio signals, a frame processor that performs time-division multiplexing control of transmission and reception signals, and a controller that controls the entire apparatus, and controls cordless telephones. Bureau and nothing The dependent station that operates as a dependent station of the intercom control station includes a transmitting unit that transmits a radio signal, a frame processing unit that performs time division multiplexing control of transmission / reception signals, a receiving unit that receives a radio signal, and the entire apparatus One of the control units performs control as a main control station that operates at its own timing, and the frame processing unit of the main control station operates to transmit a control signal at its own timing. The other control unit receives a control signal transmitted from the main control station, operates as a slave station that operates at the timing of the main control station and performs radio communication with the main control station, and transmits a control signal transmitted from the main control station As a sub-control station that operates at the reception timing of the sub-control station, the frame processing unit of the sub-control station operates to transmit a control signal according to the reception timing of the control signal transmitted by the main control station, The control unit receives a control signal transmitted from the main control station and the sub control station, and when the main control station or the sub control station and the dependent station perform wireless communication, the frame processing unit of the dependent station performs the wireless communication. Alternatively, it is characterized in that it operates so as to perform time division multiplexing control of transmission / reception signals in accordance with the reception timing of the control signal transmitted by the sub control station.

  The control station of the cordless telephone and the control station of the wireless door phone are operated as one of the other dependent stations and transmit a control signal for time division multiplexing, and the sub control station operating as the other dependent station is the main station. Since the control signal for time division multiplexing is transmitted based on the timing of the control signal transmitted by the control station, the dependent station operates according to the reception timing of the control signal transmitted by each control station. By arranging the control signal transmission timing of the control station and the sub-control station so as not to overlap, the control signal transmitted by the control station of the cordless telephone and the control station of the wireless intercom can be received by one radio circuit in the subordinate station Thus, the circuit configuration of the dependent station can be simplified, and the wireless communication system can be provided at a low price.

  According to a seventh aspect of the invention for solving the above-mentioned problem, the dependent station includes a notification unit for notifying a call and an input means for responding to the call, and receives a call signal from the main control station or the sub-control station. Then, the control unit of the dependent station performs control to notify the call from the main control station or the sub control station from the notification unit, and when the response operation for the call is performed from the input unit, the main control station that transmitted the call signal Alternatively, control is performed so as to perform direct wireless communication with the sub-control station.

  When the subordinate station receives the call signal from the control station, the notification unit displays the call signal. Accordingly, in response to a call from the control station of the cordless telephone or the control station of the wireless doorphone, for example, the cordless telephone When calling from the control station, the caller's phone number is displayed to notify the arrival of the cordless telephone, and when calling from the control station of the wireless doorphone, the visitor's image is displayed to notify the call from the wireless doorphone. By doing so, it becomes possible to improve convenience. In addition, even when calls are simultaneously generated from the control station of the cordless telephone and the control station of the wireless door phone, it is possible to further improve convenience by displaying both calls. Also, when a response operation is performed for a call, the control station of the cordless telephone that transmitted the call signal selected by the user, or the control station of the wireless doorphone and the subordinate station operate so as to perform direct radio communication. When a station communicates with a control station, wireless communication between the control stations is not performed, so wireless communication is connected between the control stations, and communication between the dependent station and the control station is relayed wirelessly by other control stations. Compared to communication, the required number of wireless communication channels is less, and it is possible to reduce the deterioration of communication quality due to communication errors that occur on the wireless communication channel and the occurrence of communication busy due to insufficient radio resources. . In addition, when a response operation is performed for a call, the control station of the cordless telephone that transmitted the call signal selected by the user, or the control station of the wireless doorphone and the subordinate station operate so as to perform direct wireless communication. The control station of the cordless telephone that transmitted the call signal selected by the user regardless of the operation state of the user, or the control station of the wireless doorphone and the subordinate station can be wirelessly connected. For example, other users can communicate with the outside of the cordless telephone. When a wireless doorphone is called while a cordless phone is used for extension communication or a user tries to respond to the wireless doorphone from a subordinate station, the response to the wireless doorphone is due to a shortage of wireless resources in the control station of the cordless phone. It is possible to reduce the occurrence of communication busy due to a shortage of radio resources due to the operating state of other control stations, such as being unable to perform communication.

  An eighth invention made to solve the above-mentioned problem is a communication system of a wireless communication system composed of a cordless telephone and a wireless doorphone comprising a wireless communication device that performs wireless communication between a control station and a dependent station, The control station of the cordless telephone includes a step of operating as a control station and communicating with the dependent station, and the control station of the wireless door phone includes the step of operating as a control station and communicating with the dependent station, the control station of the cordless telephone, One of the control stations of the wireless door phone operates as the other dependent station and includes a step of performing wireless communication between the control stations.

  Communication is performed in a time-division multiplex, and the control station of the cordless telephone and the control station of the wireless doorphone perform wireless communication between the control station of the cordless telephone and the control station of the wireless doorphone by operating one as a subordinate station of the other. Also, the control station of the cordless telephone and the control station of the wireless doorphone perform wireless communication with their subordinate stations, so that communication by wireless communication is possible between the wireless doorphone and the cordless telephone without complicating the scale of the wireless circuit. In addition, the wireless door phone and the cordless telephone can be operated alone.

  A ninth invention made to solve the above-described problem is that when one control station cannot receive a radio signal transmitted by the other control station, it does not perform the step of operating as the other dependent station. It is characterized by.

  When the sub-control station cannot receive a radio signal transmitted by the main control station, the sub-control station operates as the main control station, so that the user operates as the main control station from the wireless communication system of the cordless telephone and the radio doorphone of the present invention. When the wireless communication device is replaced with another wireless communication device other than the present invention, the sub control station automatically operates as the main control station and can operate independently, so that the user replaces the wireless communication device with a new one. It is possible to improve convenience. At this time, the old sub-control station that has been switched to the operation of the main control station is also operating as a sub-control station. In other words, it can be used for wireless communication with its own continuous station, and it has the effect of enabling effective use of slots in time division communication.

  According to a tenth aspect of the present invention, the wireless intercom control station and the cordless telephone control station include a step of performing a registration operation, and after the step of registering one control station as the other dependent station. One of them is characterized in that it performs a step of performing wireless communication between each control station by operating as the other dependent station.

  By registering one control station as the other dependent station, the control station that registered as the dependent station performs the operation as the sub control station, so that it registers and associates the specific cordless phone with the wireless door phone. In addition, when the cordless telephone and the wireless door phone can operate independently by registering or canceling the registration before or after the registration, the cordless telephone can be operated in the master unit (control station). Corresponding to the control station of the cordless phone and the wireless doorphone with the simple operation equivalent to the operation, when the user purchases only one of the cordless phone and the wireless doorphone and later purchases the other, or the cordless phone When one of the wireless doorphones breaks down and is replaced, the wireless communication system can be freely expanded and the convenience is improved. Also, when using a cordless phone or wireless doorphone alone, it operates as a single wireless communication system by setting it to an unregistered state, so it does not operate as a sub control station that receives the main control station. There is an effect that useless operation is eliminated and the start-up when the power is turned on becomes quick.

  An eleventh invention made to solve the above-mentioned problem is to perform time division multiplex communication, the control station transmits a control signal that is a time reference for time division multiplex, and the subordinate station receives the control signal and performs control. A communication system for a wireless communication system comprising a cordless telephone and a wireless doorphone comprising a wireless communication device that performs time-division multiplexing time synchronization with a station and performs wireless communication between a control station and a subordinate station. The control station includes a step of operating as a control station and communicating with a dependent station, and a step of performing time-division multiplexing control of transmission / reception signals, and the control station of the radio intercom operates as a control station and communicating with the dependent station And a step of performing time-division multiplexing control of transmission / reception signals, one of which includes a step of transmitting a control signal at its own timing, and the other includes a step of receiving a control signal and a reception It is obtained by comprising the step of transmitting a control signal according to the reception timing of the control signals. The control station of the cordless telephone and the control station of the wireless door phone are operated as one of the other dependent stations and transmit a control signal for time division multiplexing, and the sub control station operating as the other dependent station is the main station. Since the control signal for time division multiplexing is transmitted based on the timing of the control signal transmitted by the control station, the optimal timing relationship of the time division multiplexing for the control signal transmission timing of the main control station and the sub control station The slot can be effectively used in the time division communication.

  A twelfth invention made to solve the above-mentioned problem is a communication system of a wireless communication system composed of a cordless telephone and a wireless doorphone comprising a wireless communication device that performs wireless communication between a control station and a dependent station, The control station of the cordless telephone includes a step of operating as a control station and communicating with a dependent station, and the control station of the wireless door phone includes a step of operating as a control station and communicating with the dependent station, The subordinate station operating as a subordinate station of the radio intercom control station comprises the steps of operating as a subordinate station and communicating with the control station of the cordless telephone and the radio intercom control station, the control station of the cordless telephone, the radio intercom control station One of the above is characterized in that it comprises a step of operating as the other dependent station and performing wireless communication between the respective control stations.

  One of the control station of the cordless telephone and the control station of the wireless door phone operates as a subordinate station of the other, and the subordinate station of the cordless telephone and the radio doorphone operates as a subordinate station of each control station. The wireless intercom control station, the cordless telephone control station and the subordinate station, and the radio intercom control station and the subordinate station can communicate with each other independently by wireless communication, thereby improving convenience. In addition, since a dependent station can be used as a dependent station of a cordless telephone or a dependent station of a wireless doorphone, when a cordless telephone and a wireless doorphone are installed, the wireless communication device as one dependent station controls both. This makes it possible to communicate with a station, improving convenience, and providing a low-cost wireless communication system including a cordless telephone and a wireless door phone. In addition, it can operate only in the control station and subordinate station of the cordless telephone, or only in the control station and subordinate station of the wireless doorphone. Even when the telephone or the doorphone is replaced with another device, the remaining cordless telephone can be controlled. The station and the dependent station, or the control station and the dependent station of the wireless door phone can operate independently, and there is an effect that there is no waste due to replacement of a part of the wireless communication system.

  In a thirteenth aspect of the invention for solving the above-mentioned problems, time division multiplexing communication is performed, the control station transmits a control signal that is a reference for time division multiplexing time, and the subordinate station receives the control signal and performs control. A communication system for a wireless communication system comprising a cordless telephone and a wireless doorphone comprising a wireless communication device that performs time-division multiplexing time synchronization with a station and performs wireless communication between a control station and a subordinate station. The control station includes a step of operating as a control station and communicating with a dependent station, and a step of performing time-division multiplexing control of transmission / reception signals, and the control station of the radio intercom operates as a control station and communicating with the dependent station And a step of performing time-division multiplexing control of transmission / reception signals, one of which includes a step of transmitting a control signal at its own timing, and the other includes a step of receiving a control signal and a reception A control station that transmits a control signal in accordance with the reception timing of the control signal, and the subordinate station that operates as a subordinate station of the control station of the cordless telephone and the radio intercom control station is the control station of the cordless telephone and the control station of the radio intercom Receiving the control signal transmitted by the main control station or the sub control station and the dependent station when the main control station or the sub control station performs radio communication, the subordinate station receives the control signal transmission timing transmitted by the main control station or the sub control station performing the radio communication According to the method, a step is provided so as to perform time-division multiplexing control of transmission / reception signals.

  The control station of the cordless telephone and the control station of the wireless door phone are operated as one of the other dependent stations and transmit a control signal for time division multiplexing, and the sub control station operating as the other dependent station is the main station. Since the control signal for time division multiplexing is transmitted based on the timing of the control signal transmitted by the control station, the dependent station operates according to the reception timing of the control signal transmitted by each control station. By arranging the control signal transmission timing of the control station and the sub-control station so as not to overlap, the control signal transmitted by the control station of the cordless telephone and the control station of the wireless intercom can be received by one radio circuit in the subordinate station Thus, the circuit configuration of the dependent station can be simplified, and the wireless communication system can be provided at a low price.

  According to a fourteenth aspect of the present invention for solving the above-described problems, the subordinate station notifies a call from the main control station or the sub-control station when receiving a call signal from the main control station or the sub-control station; And a step of directly starting wireless communication with the main control station or sub-control station that has transmitted the call signal by the response operation.

  When the subordinate station receives the call signal from the control station, the notification unit displays the call signal. Accordingly, in response to a call from the control station of the cordless telephone or the control station of the wireless doorphone, for example, the cordless telephone When calling from the control station, the caller's phone number is displayed to notify the arrival of the cordless telephone, and when calling from the control station of the wireless doorphone, the visitor's image is displayed to notify the call from the wireless doorphone. By doing so, it becomes possible to improve convenience. In addition, even when calls are simultaneously generated from the control station of the cordless telephone and the control station of the wireless door phone, it is possible to further improve convenience by displaying both calls. Also, when a response operation is performed for a call, the control station of the cordless telephone that transmitted the call signal selected by the user, or the control station of the wireless doorphone and the subordinate station operate so as to perform direct radio communication. When a station communicates with a control station, wireless communication between the control stations is not performed, so wireless communication is connected between the control stations, and communication between the dependent station and the control station is relayed wirelessly by other control stations. Compared to communication, the required number of wireless communication channels is less, and it is possible to reduce the deterioration of communication quality due to communication errors that occur on the wireless communication channel and the occurrence of communication busy due to insufficient radio resources. . In addition, when a response operation is performed for a call, the control station of the cordless telephone that transmitted the call signal selected by the user, or the control station of the wireless doorphone and the subordinate station operate so as to perform direct wireless communication. The control station of the cordless telephone that transmitted the call signal selected by the user regardless of the operation state of the user, or the control station of the wireless doorphone and the subordinate station can be wirelessly connected. For example, other users can communicate with the outside of the cordless telephone. When a wireless doorphone is called while a cordless phone is used for extension communication or a user tries to respond to the wireless doorphone from a subordinate station, the response to the wireless doorphone is due to a shortage of wireless resources in the control station of the cordless phone. It is possible to reduce the occurrence of communication busy due to a shortage of radio resources due to the operating state of other control stations, such as being unable to perform communication.

(Embodiment)
A configuration of a wireless communication system according to an embodiment of the present invention will be described with reference to FIGS. 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 door phone device according to the embodiment of the present invention. FIG. 3 is a diagram for explaining the configuration of the cordless telephone master unit of the cordless telephone apparatus according to the embodiment of the present invention. FIG. 4 is a diagram for explaining the configuration of the cordless telephone handset of the cordless telephone apparatus according to the embodiment of the present invention.

  As shown in FIG. 1, a radio communication system 1 according to an embodiment of the present invention includes an intercom device 2 that operates as a sub-control station, and a cordless telephone device 3 that is connected to a telephone line 5 that operates as a main control station. The cordless telephone cordless handset 4 operating as a dependent station is provided. The door phone device 2 includes an entrance handset 2a and a door phone base unit 2b. In FIG. 1, only one cordless telephone handset 4 is shown, but a plurality of cordless telephone handsets 4 may be provided. In the wireless communication system 1 of the present embodiment, the cordless telephone device 3 is a main control station, the intercom base unit 2b is a sub control station, and the cordless telephone handset 4 is a subordinate station, and communicates by wireless TDAM.

  As shown in FIG. 2, in the door phone device 2, the entrance cordless handset 2a and the door phone master set 2b are connected by wire. The entrance cordless handset 2a includes a camera unit 101 that captures an image of a visitor, a call unit 102 for making a call with the visitor, and a call detection unit 103 that detects a call by the visitor and transmits the call as a call notification to the doorphone master unit 2b. And a demultiplexing circuit 104 that multiplexes or separates the captured video data, audio data, and call notification and communicates with the intercom master unit 2b.

  The intercom base unit 2b includes a monitor circuit 201, a monitor 202, an image information storage unit 203, a call detection unit 204, a notification unit 205, a voice circuit 206, a call unit 207, a synchronization processing unit 208, a frame Processing unit 209, radio unit 210, operation unit 211, antenna 213, control unit 214, telephone base unit ID storage unit 215, door phone ID storage unit 216, slave unit ID storage unit 217, demultiplexing Circuit 220.

  The monitor circuit 201 is connected to the demultiplexing circuit 220 and causes the monitor 202 to display the video data from the entrance terminal 2a.

  The image information storage unit 203 stores the video data from the entrance cordless handset 2 a via the monitor circuit 201 and outputs it to the control unit 214.

  The call detection unit 204 is connected to the demultiplexing circuit 220, detects a call notification from the call detection unit 103 of the front door 2a, and sounds a chime or the like of the notification unit 205 to confirm that there is a visitor to the user. Notifying and notifying the control unit 214.

  The audio circuit 206 is connected to the demultiplexing circuit 220, converts the audio signal input from the microphone of the call unit 207 into audio data and transmits it to the entrance unit 2a, or receives the audio data received from the entrance unit 2a. It has a function of converting it into a voice signal and ringing it through the speaker of the telephone call unit 207, or relaying voice data to the entrance cordless handset 2a when communicating with the cordless telephone cordless handset 4.

  The synchronization processing unit 208 is connected to the frame processing unit 209 and the control unit 214, and performs synchronization processing using the preamble and sync word at the head of the packet.

  The frame processing unit 209 is connected to the audio circuit 206, the radio unit 210, and the control unit 214, and extracts a control data field and an information data field from the demodulated data based on the synchronization signal source and outputs the extracted data to the control unit 214 or the audio circuit 206. It has.

  The radio unit 210 performs modulation and demodulation for communication by TDMA, and transmits and receives via the antenna 213.

  The operation unit 211 includes a key that is pressed when calling with a visitor.

  The control unit 214 performs overall control of the entrance cordless handset 2a and the door phone master set 2b.

  The telephone base unit ID storage unit 215 registers an ID that is identification information of the cordless telephone device 3 that is a main control station, and the door phone ID storage unit 216 registers the ID of the own device that is a sub control station. In addition, in the handset ID storage unit 217, an ID that is identification information of a wireless handset as a subordinate station registered in the door phone device 2 is registered, and can be read from the control unit 214. It is connected.

  Next, the cordless telephone device 3 will be described in detail with reference to FIG.

  As shown in FIG. 3, the cordless telephone apparatus 3 includes a line interface unit 301, a voice circuit 302, an incoming call detection unit 303, a handset ID storage unit 304, a telephone base unit ID storage unit 305, and a door phone ID storage. Unit 310, frame processing unit 306, radio unit 307, antenna 308, operation unit 311, notification unit 312, call unit 313, monitor circuit 314, monitor 315, and control unit 320. .

  The line interface unit 301 is connected to the telephone line 5 and outputs to the incoming call detection unit 303 and also to the voice circuit 302. Also, an analog voice signal from the voice circuit 302 is transmitted to the telephone line 5.

  The audio circuit 302 is connected to the frame processing unit 306 and the call unit 313, converts an audio signal input from the microphone of the call unit 313 into audio data, and outputs the audio data to the frame processing unit 306 or input from the frame processing unit 306. The voice data is converted into a voice signal and played by the speaker of the calling unit 403.

  The incoming call detection unit 303 is connected to the line interface unit 301 and the control unit 320, detects an incoming call with a voice signal from the telephone line 5, and notifies the control unit 320 of the incoming call.

  The handset ID storage unit 304 registers the ID of the cordless telephone handset 4 that is a dependent station that is a communication partner, and the doorphone ID storage unit 310 is a sub-control that operates the dependent station that is a communication partner. The ID of the office intercom device 2 is registered, and the ID of the telephone base unit ID storage unit 305 is registered with the ID of its own device, which is the main control station, so that it can be read from the control unit 320. .

  The frame processing unit 306 is connected to the audio circuit 302, the radio unit 307, and the control unit 320. The frame processing unit 306 extracts a control data field and an information data field from the demodulated data based on the synchronization signal source and outputs them to the control unit 320 or the audio circuit 302. It has.

  The wireless unit 307 performs modulation and demodulation for communication by TDMA, and transmits and receives via the antenna 308.

  The operation unit 311 includes number keys used for inputting a destination telephone number, and function keys such as a key for on-hook / off-hook and a key for redialing.

  The notification unit 312 is connected to the control unit 320, and notifies the incoming call from the telephone line 5 and the notification of the visitor from the door phone device 2 based on the notification from the control unit 320.

  The monitor circuit 314 is connected to the control unit 320 and displays the video data from the door phone device 2 on the monitor 315.

  The control unit 320 performs overall control of the cordless telephone device 3.

  Next, the cordless telephone handset 4 will be described in detail with reference to FIG. As shown in FIG. 4, the cordless telephone handset 4 includes a notification unit 401, a voice circuit 402, a call unit 403, a monitor circuit 404, a synchronization processing unit 405, a frame processing unit 406, and a wireless unit 407. , Antenna 408, operation unit 409, control unit 410, handset ID storage unit 411, telephone base unit ID storage unit 412, door phone ID storage unit 413, and monitor 414.

  The notification unit 401 is connected to the control unit 410, and notifies an incoming call from the telephone line 5 or a visitor notification from the door phone device 2 by a notification from the control unit 410.

  The audio circuit 402 is connected to the frame processing unit 406 and the call unit 403, converts an audio signal input from the microphone of the call unit 403 into audio data and outputs the audio data to the frame processing unit 406, or the control unit 410 or frame processing The voice data input from the unit 406 is converted into a voice signal and played by the speaker of the call unit 403.

  The monitor circuit 404 is connected to the control unit 410 and causes the monitor 414 to display the video data from the door phone device 2.

  The synchronization processing unit 405 is connected to the frame processing unit 406 and the control unit 410, and performs synchronization processing using the preamble and sync word at the head of the packet.

  The frame processing unit 406 is connected to the audio circuit 402, the radio unit 407, and the control unit 410, and extracts a control data field and an information data field from the demodulated data based on the synchronization signal source and outputs the extracted data to the control unit 320 or the audio circuit 402. It has.

  The radio unit 407 performs modulation and demodulation for communication by TDMA, and transmits and receives via the antenna 408.

  The operation unit 409 includes function keys such as a number key used for inputting a destination telephone number, a key for on-hook / off-hook, and a key for redialing.

  The controller 410 performs overall control of the cordless telephone handset 4.

  In the handset ID storage unit 411, the ID of its own device which is a dependent station is registered. In the telephone base ID storage unit 412, the ID of the cordless telephone device 3 that is the main control station is registered. In the door phone ID storage unit 413, the ID of the door phone device 2 which is a sub control station is registered. The handset ID storage unit 411, the telephone base unit ID storage unit 412 and the door phone ID storage unit 413 are connected so as to be readable from the control unit 410.

  FIG. 5 shows a packet data format when the doorphone base unit 2b, the cordless telephone device 3 and the cordless telephone handset 4 of the wireless communication system 1 according to the embodiment of the present invention configured as described above perform communication by TDMA. Based on FIG. 5A and FIG. 5B are diagrams for explaining the format of packet data.

  As shown in FIG. 5A, the data packet includes a packet used when transmitting control information and a packet used when transmitting audio data and video data. Each packet data includes a synchronization signal, a control data field, and a CRC (Cyclic Redundancy Check) 1 field in which a check code of the control data field is stored.

  The synchronization signal is composed of a preamble and a sync word, and is for synchronizing with the communication source. A message is stored in the control data field.

  Audio data and image data are stored in an information data field, and a check code of the information data field is stored in CRC2.

  As shown in FIG. 5B, the control data field includes a header part and a tail part, and a message is stored in the header part. The content stored in the tail portion differs depending on the content of the message stored in the header portion. For example, in the case of an NT message, the transmission source ID is stored. That is, the NT message is used by the cordless telephone device 3 and the door phone master unit 2b. The sub-control station and the dependent station that have received the NT message transmitted by the main control station can recognize that the main control station uses the slot. In addition, the subordinate station that has received the NT message transmitted by the sub control station can recognize that the sub control station uses the slot.

  The PT message stores the ID of the cordless telephone handset 4 that performs the call. This is because, when there is an incoming call from the telephone line 5, the ID of the cordless telephone handset 4 to which the cordless telephone device 3 notifies the incoming call is stored or when there is a visitor, the doorphone main unit 2b The ID of the cordless telephone cordless handset 4 that notifies the call is stored. Further, when all of the plurality of slave units are called at the same time, a special ID (for example, an ID of ALL0) indicating that the whole is called is stored.

  The QT message is used when notifying the communication partner of the transmission slot. The sub-control station and subordinate station that have received the QT message transmitted by the main control station can recognize in which slot the control signal is transmitted, and synchronize the frame and slot with the main control station. Can be taken.

  The MT message may be used by the cordless telephone device 3 and the door phone master unit 2b, or may be used by the cordless telephone slave unit 4. When there is an incoming call from the telephone line 5 and a PT message is transmitted from the cordless telephone device 3 to the cordless telephone handset 4, a call request based on the MT message is transmitted from the cordless telephone handset 4 that is off-hook, and the cordless is used as the confirmation response. A telephone call response by an MT message is transmitted from the telephone device 3. Similarly, when there is an incoming call from the entrance cordless handset 2a and a PT message is sent from the doorphone master phone 2b to the cordless phone cordless handset 4, an off-hook cordless phone cordless handset 4 sends an MT message call request. As a confirmation response, a telephone call response by the MT message is transmitted from the doorphone master unit 2b.

  Next, the operation when the doorphone base unit 2b, the cordless telephone device 3 and the cordless telephone handset 4 communicate using the packet data as described above will be described with reference to FIGS.

  In the following description, the slot in which the cordless telephone apparatus 3 that operates as the main control station transmits a control signal serving as a reference for time division multiplexing as control information operates as a main synchronization slot and as a sub control station. A slot in which the intercom base unit 2b transmits a control signal that serves as a reference for time division multiplexing as control information is referred to as a sub-synchronization slot. In the embodiment, the slot for transmitting a radio signal when the sub control station operates as the control station and the main control station operates, and the sub station operates when the sub control station operates as the subordinate station. 2 shows an example in which a slot for transmitting a radio signal is configured to be a separate slot when performing time division multiplexing, when a sub control station operates as a control station and when a main control station operates A slot for transmitting a radio signal is called a control station transmission slot or a subordinate station reception slot, and a slot for transmitting a radio signal when the sub control station operates as a subordinate station and a subordinate station operates is a subordinate station transmission slot. Or it is called a control station reception slot. In particular, a slot that is performing a receiving operation to receive a communication request from a dependent station while the control station is waiting for a communication request from the dependent station is referred to as a standby slot.

  First, the operation of the cordless telephone device 3 will be described. As shown in FIG. 3, when the power is turned on, the control unit 320 determines the timing of the TDMA frame / slot at its own timing, and in the control station transmission slot determined in advance in the wireless communication system. The main synchronization slot is selected from any one slot, and transmission of control information is started. The control unit 320 outputs the transmission slot number and the ID of the own device registered in the telephone master ID storage unit 305 to the frame processing unit 306 in accordance with the transmission timing of the control information. In the frame processing unit 306, the control information is transmitted via the antenna 308 by adding a synchronization signal or the like to the transmission slot number and the ID and outputting the same to the wireless unit 307. Then, the control unit 320 makes a call request from the cordless telephone handset 4 in a slot excluding the slot corresponding to the main synchronization slot among the predetermined dependent station transmission slots in the wireless communication system, that is, in the standby slot. Control to shift to a steady state waiting for reception of The control unit 320 controls the wireless unit 307 to perform a reception operation in the standby slot. The demodulated data received and demodulated in the standby slot is output to the frame processing unit 306. The frame processing unit 306 extracts the control data field and CRC1 from the demodulated data input in each standby slot based on the synchronization signal source, and receives the data. If the signal is correct, the control information received in the control data field is output to the control unit 320. Then, the control unit 320 performs control so as to perform an operation in accordance with the received control information. For example, when the received control information is a communication request, the control unit 320 performs communication with a transmission source dependent station or sub-control station. Start the action to start.

  Next, the operation of the doorphone master unit 2b will be described. As shown in FIG. 2, first, the control unit 214 places the radio unit 210 in a continuous reception state, and starts a control acquisition method synchronous acquisition operation transmitted from the main control station. The packet data received and demodulated by the wireless unit 210 is passed to the frame processing unit 209.

  The frame processing unit 209 extracts the control data field from the demodulated packet data based on the synchronization signal, and outputs the transmission source ID and the reception slot number to the control unit 214 based on the reception data in the control data field.

  When the received ID matches the ID registered in the telephone master ID storage unit 215, the control unit 214 sets the slot that received the ID registered in the telephone master ID storage unit 215 as the main synchronization slot, and thereafter The cordless telephone device 3 is received at the timing. When control information for notifying the slot that is transmitting the control signal is received, frame and slot synchronization with the cordless telephone apparatus 3 (main control station) is established. For example, when the cordless telephone device 3 notifies that the slot transmitting the control signal is “1”, the frame timing is determined so that the slot (main synchronization slot) that received the control information becomes the slot 1. . That is, after the synchronization of the frame and the slot with the cordless telephone device 3 is established, the doorphone master unit 2b performs control as a subordinate station of the main control station in the main synchronization slot, and is determined in advance in the radio communication system. Of the transmission slots on the control station side, the main synchronization slot to which the cordless telephone apparatus 3 is transmitting a control signal operates as a reception slot. Then, one sub-slot is selected as a sub-synchronization slot by selecting one slot from a slot excluding the main synchronization slot that operates as a dependent station from a predetermined transmission slot on the control station side in the radio communication system. Control information is transmitted. In the present embodiment, the slot next to the main synchronization slot transmitted by the cordless telephone device 3 is used as the sub-synchronization slot of the doorphone master unit 2b.

  Then, the control unit 214 waits for slots other than the slots corresponding to the main synchronization slot and the sub-synchronization slot among transmission slots on the side of the dependent station (cordless telephone handset 4) determined in advance in the wireless communication system. Control is performed to shift to a steady state waiting for reception of a call request from the cordless telephone handset 4 as a slot.

  When a transition is made to the steady state, control as a dependent station, that is, maintenance of synchronization, is performed by receiving a control signal transmitted by the cordless telephone device 3 in the main synchronization slot. In accordance with the timing of the main synchronization slot, the control unit 214 controls the radio unit 210 to receive the control signal of the cordless telephone device 3, and the received demodulated data is output to the frame processing unit 209. The frame processing unit 209 extracts the control data field from the demodulated packet data based on the synchronization signal, outputs the received data in the control data field to the control unit 214, and sets the timing at which the synchronization signal is detected to the synchronization processing unit 208. Notify The synchronization processing unit 208 outputs a frame and slot timing correction signal to the frame processing unit 209 so that the timing at which the synchronization signal is detected becomes a predetermined timing. The operation example of the timing correction performed in the synchronization processing unit 208 is, for example, measuring the timing period at which the synchronization signal notified in the main synchronization slot is detected, and the synchronization signal detection period and a predetermined period (frame period) The timing correction signal of the frame and slot is output to the frame processing unit 209 in accordance with the deviation. At this time, it is desirable to measure the synchronization signal detection timing period in the synchronization processing unit 208 in units of short time as much as possible. The time unit is set so as not to affect the communication with the subordinate station. For example, a time shorter than the transmission time required for 1-bit transmission determined by the communication speed (bit rate) communicated in this system (for example, The synchronization signal detection period is counted in units of 1 / 10-bit time, and frame and slot timing correction signals are generated. The timing correction signal is output at a time when the sub-control station is not transmitting / receiving, and the timing of the frame and slot is corrected. For example, at the end of each slot in order to compensate for the delay in reception timing due to propagation delay in time division communication when the reception of the main synchronization slot ends and the transmission or reception of the next slot is performed. The timing of the frame and slot is corrected with the guard time which is the transmission prohibition time.

  Further, the control unit 214 is a cordless telephone handset 4 in a slot except a slot corresponding to the main synchronization slot and the sub-synchronization slot among the subordinate station transmission slots predetermined in the wireless communication system, that is, a standby slot. Control to shift to a steady state waiting for reception of a call request from the mobile phone. The control unit 214 controls the wireless unit 210 to perform a reception operation in the standby slot. The demodulated data received and demodulated in the standby slot is output to the frame processing unit 209. The frame processing unit 209 extracts the control data field CRC1 from the demodulated data input in each standby slot based on the synchronization signal source, and receives it. If the signal is correct, the control information received in the control data field is output to the control unit 214. Then, the control unit 214 performs control so as to perform an operation according to the received control information. For example, when the received control information is a communication request, the control unit 214 performs an operation of starting communication with the transmission source dependent station. to start.

  Finally, the operation of the cordless telephone handset 4 will be described. As shown in FIG. 4, the control unit 410 first searches for the control information of the cordless telephone device 3 stored in the telephone base unit ID storage unit 412 by continuous reception, similarly to the door phone base unit 2b, and stores the telephone base unit ID. The control information for notifying the transmission slot of the control slot transmitted by the cordless telephone device 3 stored in the unit 412 is received, and synchronization between the cordless telephone device 3 and the TDMA frame / slot is established. After synchronization is established, synchronization is maintained by receiving a control signal transmitted by the cordless telephone device 3 in the main synchronization slot. In accordance with the timing of the main synchronization slot, control unit 410 controls radio unit 407 to receive the control signal of cordless telephone apparatus 3, and the received demodulated data is output to frame processing unit 406. The frame processing unit 406 extracts a control data field from the demodulated packet data based on the synchronization signal, outputs the received data in the control data field to the control unit 410, and also detects the timing at which the synchronization signal is detected in the synchronization processing unit 405. Notify The synchronization processing unit 405 outputs a frame and slot timing correction signal to the frame processing unit 406 so that the timing at which the synchronization signal is detected becomes a predetermined timing, and the frame processing unit 406 generates a frame based on the timing correction signal. The slot timing is corrected. The operations of the synchronization processing unit 405 and the frame processing unit 406 when the cordless telephone handset 4 receives a control signal transmitted from the cordless telephone device 3 to maintain synchronization and the like are the same as those of the above-described doorphone parent unit. The operation is similar to that of the machine 2b, and detailed description thereof is omitted.

  In addition, after establishing synchronization with the cordless telephone device 3, the control unit 410 uses the control station transmission slot (dependent station reception slot) other than the main synchronization slot that receives the control information of the cordless telephone device 3 to control information of the intercom base unit 2b. Control to receive That is, the control unit 410 controls the radio unit 407 to perform reception in the control station transmission slot (dependent station reception slot), and the received demodulation data is output to the frame processing unit 406. Frame processing section 406 extracts the control data field from the demodulated packet data based on the synchronization signal, and outputs the received data in the control data field to control section 410. When the control unit 410 receives the control information of the doorphone master unit 2b that matches the ID stored in the doorphone ID storage unit 413, the control unit 410 receives the control information of the cordless telephone device 3 and the control information of the doorphone base unit 2b. , Stop receiving in slots other than the sub-synchronous slot that receives, and shift to a standby state.

  Next, the state of the transmission slot and the reception slot when the door phone base unit 2b, the cordless telephone device 3, and the cordless telephone handset 4 communicate with each other will be described with reference to FIGS. 6 to 11 are diagrams for explaining the states of the transmission slot and the reception slot when communication is performed in the wireless communication system according to the embodiment of the present invention.

  As shown in FIG. 6, in this example, the transmission slots on the control station side determined in advance in the wireless communication system are four slots from slot 1 to slot 4, and the transmission slot on the dependent station side is slot 5 as well. 4 shows a time-division multiplex slot arrangement in which one frame is composed of four slots from slot 8 to slot 8, and the time slot of the wireless communication system 1 has four transmission slots and reception slots corresponding to the transmission slots. It consists of 4 slots.

  First, when the power is turned on, the cordless telephone device 3 determines the timing of the TDMA frame / slot at its own timing, and selects an arbitrary slot from the transmission slots on the control station side determined in advance in the wireless communication system. Select and start transmission of control information (S1). Then, reception of the control station reception slot excluding the control station reception slot corresponding to the slot for transmitting the control signal, that is, the standby slot is started (S2). FIG. 6 shows an example in which the cordless telephone device 3 selects the slot 1 and starts transmitting control information. The slot 1 for transmitting control information is the main synchronization slot, and the slots 6 to 8 are standby slots. It becomes.

  Based on the control information transmitted in the main synchronization slot, the intercom master unit 2b establishes synchronization. That is, the intercom base unit 2b first activates continuous reception (S3), and when receiving a control signal transmitted by the cordless telephone device 3, stops continuous reception and based on information such as a slot number included in the control signal. Frame and slot synchronization with the cordless telephone base unit 3 is established, and in the main synchronization slot (slot 1), operation as a dependent station that receives the control signal of the cordless telephone base unit 3 is started (S4). Then, a control signal transmission slot is selected from control station transmission slots other than the synchronization slot, and transmission of the control signal is started (S5). Then, reception of the control station reception slot, that is, the standby slot excluding the control station reception slot corresponding to the main synchronization slot that operates as a dependent station and the sub synchronization slot that transmits the control signal, is started (S6). FIG. 6 shows an example in which door phone base unit 2b selects slot 2 and starts transmission of control information. Slot 2 for transmitting control information is a sub-synchronization slot, and slots 7 to 8 are standby slots. It becomes.

  Similarly, the cordless telephone handset 4 establishes synchronization based on the control information transmitted in the main synchronization slot. That is, the cordless telephone cordless handset 4 first starts continuous reception (S7). When the control signal transmitted from the cordless telephone device 3 is received, the cordless telephone cordless handset 4 stops the continuous reception and uses information such as a slot number included in the control signal. Next, frame and slot synchronization with the cordless telephone base unit 3 is established (S8). Then, reception of control station transmission slots other than the main synchronization slot is started according to the timing of the frame and slot (S9). When the control signal transmitted by the intercom base unit 2b is received (S10), reception other than the main synchronization slot and the sub-synchronization slot is stopped and a standby state is entered (S11).

  Next, the state of communication between the doorphone master unit 2b, the cordless telephone device 3 and the cordless telephone slave unit 4 when the call detection unit 103 of the entrance cordless handset 2a detects a visitor call will be described with reference to FIG. . Note that the initial state of the cordless telephone device 3, door phone master unit 2b, and cordless telephone slave unit 4 in FIG. 7 is the end state described in FIG. 6, that is, the cordless telephone device 3 transmits a control signal in the main synchronization slot. While receiving the standby slot, the intercom master unit 2b receives the standby slot while transmitting the control signal in the sub-synchronization slot, and the cordless telephone handset 4 is receiving the main synchronization slot and the sub-synchronization slot. It is.

  First, the operation of the doorphone master unit 2b will be described. When a visitor call is detected, a call signal is transmitted to the cordless telephone handset 4 in the sub-synchronization slot (S21). Then, one of the standby slots of the cordless telephone device 3 is selected and a call request is transmitted to the cordless telephone device 3 (S22). That is, the intercom master unit 2b selects one of its own standby slots, switches the selected slot to the operation as a subordinate station, and starts transmission to the cordless telephone device 3. Then, in order to receive a call response from the cordless telephone device 3, the slot corresponding to the slot that has transmitted the call request with the identification code (ID) of the transmission source to the cordless telephone device 3 is operated as a subordinate station. That is, the operation is switched to the receiving operation (S23). Then, when a call response is received from the cordless telephone device 3, the transmission operation of the slot that transmitted the call request and the reception operation of the slot that received the call response are continued. The example of FIG. 6 shows an example in which slot 3 and slot 7 are selected as slots in which the intercom base unit 2b communicates with the cordless telephone device 3, and the intercom base unit 2b uses the slot 3 and the slot 7 as dependent stations. An operation, that is, an operation of receiving a radio signal from the cordless telephone apparatus 3 in the slot 3 and transmitting a radio signal to the cordless telephone apparatus 3 in the slot 7 is shown.

  Next, the operation of the cordless telephone device 3 will be described. When the cordless telephone apparatus 3 receives the control signal in the standby slot, the cordless telephone apparatus 3 checks the transmission source of the call request based on the identification code (ID) of the transmission source included in the received control signal. When the identification code (ID) of the transmission source matches the identification code (ID) stored in the doorphone ID storage unit 310, it is recognized that the call request is from the doorphone master unit 2b, and the call from the doorphone side is made. The operation of notifying is started. That is, the notification unit 312 notifies a visitor notification from the door phone device 2 (S24). Then, a call response is transmitted in the control station transmission slot corresponding to the slot that has received the call request (S25), and thereafter, the reception operation of the slot that has received the call request and the transmission of the slot that has transmitted the call response. Continue operation. In the example of FIG. 6, an example is shown in which the cordless telephone device 3 selects the slot 3 and the slot 7 as slots for communicating with the doorphone master unit 2 b, and the cordless telephone device 3 is connected to the doorphone master unit 2 b in the slot 3. The operation of transmitting a radio signal and receiving the radio signal from the doorphone master unit 2b in the slot 7 is shown.

  Next, the operation of the cordless telephone handset 4 will be described. When the cordless telephone cordless handset 4 receives the call signal in the sub-synchronization slot that receives the control signal of the doorphone master unit 2b, the cordless telephone handset 4 notifies the call from the doorphone side while maintaining the reception of the main synchronization slot and the sub-synchronization slot. The operation is started (S26). That is, the notification unit 401 notifies a visitor notification from the door phone device 2.

  Next, the state of communication when the cordless telephone device 3 responds to a call from the doorphone master unit 2b will be described with reference to FIG. Note that the initial state of the cordless telephone device 3, the doorphone master unit 2b, and the cordless phone slave unit 4 in FIG. 8 is the end state described in FIG. 7, that is, the call of the doorphone master unit 2b is called the cordless telephone device 3 and the cordless telephone. It is the state which the subunit | mobile_unit 4 is alerting | reporting.

  First, the operation of the cordless telephone device 3 will be described. When the cordless telephone device 3 is informing of a call from the doorphone master unit 2b and a response operation to the call from the doorphone master unit 2b is performed in the operation unit 311, a transmission slot to the doorphone master unit 2b is used. A response notification is transmitted (S31), call notification is stopped, and a voice path is connected. Thereafter, the voice of the user of the cordless telephone device 3 input from the microphone of the call unit 313 is transmitted to the doorphone master unit 2b via the voice circuit 302, the frame processing unit 306, and the radio unit 307, and from the doorphone master unit 2b. The received signal is output from the speaker of the call unit 313 via the frame processing unit 306 and the audio circuit 302. In the example of FIG. 8, the audio signal from the cordless telephone device 3 is transmitted in the slot 3 after S31, and the audio signal from the doorphone master unit 2b, that is, the entrance cordless handset 2a is received in the slot 7, Output from the telephone device 3.

  Next, the operation of the door phone master unit 2b will be described. When receiving the response notification from the cordless telephone device 3 in the slot communicating with the cordless telephone device 3, the door phone main unit 2 b shifts to a call state with the cordless telephone device 3 (S 32) and moves to the cordless telephone handset 4. A call stop control signal is transmitted in the sub-synchronization slot (S33).

  Thereafter, the voice of the visitor input from the microphone of the communication unit 102 of the entrance cordless handset 2b passes through the demultiplexing circuit 104, the demultiplexing circuit 220, the audio circuit 206, the frame processing unit 209, and the radio unit 210. 3, and the signal received from the cordless telephone device 3 is output from the speaker of the call unit 102 via the frame processing unit 209, the voice circuit 206, the demultiplexing circuit 220, and the demultiplexing circuit 104. In the example of FIG. 8, the audio signal from the cordless telephone device 3 is received in the slot 3 after S32 and output from the front cordless handset 2b, and the voice signal from the doorphone master unit 2b, that is, the front cordless handset 2a is received. It is transmitted in slot 7.

  Next, the operation of the cordless telephone handset 4 will be described. When the cordless telephone handset 4 receives the call stop control signal transmitted by the doorphone master unit 2b in the sub-synchronization slot, the cordless telephone handset 4 stops calling the doorphone and returns to the standby state (S34).

  Next, the state of communication when the call is disconnected from the cordless telephone device 3 after the cordless telephone device 3 responds to the call from the door phone master unit 2b will be described with reference to FIG.

  First, the operation of the cordless telephone device 3 will be described. When the cordless telephone device 3 is in communication with the entrance cordless handset 2a via the doorphone master unit 2b and a disconnection operation is performed at the operation unit 311, a disconnection notification is transmitted in a transmission slot to the doorphone master unit 2b. (S40), and the voice path is disconnected. When a disconnection confirmation is received from the doorphone master unit 2b (S41), the slot that was transmitting to the doorphone master unit 2b is stopped (S42), and the slot that was receiving the doorphone master unit 2b is a standby slot. The operation is switched to (S43).

  Next, the operation of the door phone master unit 2b will be described. When receiving the disconnection notification from the cordless telephone device 3, the intercom base unit 2b disconnects the voice path (S44). Then, a disconnection confirmation is transmitted to the cordless telephone device 3 (S45). Then, the slot that was receiving the cordless telephone device 3 is stopped (S46), and the slot that was transmitting to the cordless telephone device 3 is switched to the operation as the control station, that is, the operation as the standby slot (S47). ).

  Next, a communication state when the cordless telephone handset 4 responds to a call from the door phone base unit 2b will be described with reference to FIG. Note that the initial state of the cordless telephone device 3, the door phone master unit 2b, and the cordless phone slave unit 4 in 9 is the end state described with reference to FIG. 7, that is, the call of the door phone master unit 2b is called the cordless telephone device 3 and the cordless phone unit. In this state, the machine 4 is informing.

  First, the operation of the cordless telephone handset 4 will be described. When a response operation for a call from the doorphone master unit 2b is performed in the operation unit 409 in a state where the call from the doorphone master unit 2b is being notified by the cordless telephone cordless handset 4, the main synchronization slot and the sub-synchronization slot In response to this, a response notification is transmitted by selecting one of the transmission slots of the dependent station, excluding slots corresponding to the primary synchronization slot and the secondary synchronization slot from the transmission slots of the dependent station (S51). Is stopped, reception of the reception slot of the dependent station corresponding to the slot that transmitted the response notification is started, and response confirmation is received (S52). When the response confirmation is received, the voice path is connected, and thereafter, the voice of the user of the cordless telephone handset 4 input from the microphone of the call unit 403 is transmitted via the voice circuit 402, the frame processing unit 406, and the radio unit 407. The signal received from the doorphone master unit 2b is output from the speaker of the call unit 403 via the frame processing unit 406 and the audio circuit 402. In the example of FIG. 9, the audio signal from the cordless telephone handset 4 is transmitted in the slot 8 after S52 while receiving the main synchronization slot (slot 1) and the sub-synchronization slot (slot 2). A voice signal from the base unit 2 b, that is, the entrance handset 2 a is received by the slot 4 and output from the cordless telephone handset 4.

  If the slot where the cordless telephone handset 4 sends a response notification to the doorphone master unit 2b overlaps with the slot where the doorphone master unit 2b notifies the cordless telephone device 3, the doorphone master unit 2b sends a response notification. Response confirmation is not sent. Therefore, in the cordless telephone handset 4, after sending a response notification to the doorphone master unit 2 b, if a response confirmation is not received even if reception is continued for a certain period of time, the slot is changed and a response notification is sent to the doorphone master unit 2 b. Send.

  Next, the operation of the door phone master unit 2b will be described. When the doorphone base unit 2b receives a response notification from the cordless telephone handset 4 in the slot in which the cordless telephone handset 4 is waiting for reception, the doorphone base unit 2b starts control to shift to a call state with the cordless telephone handset 4 (S55). ). First, the intercom base unit 2b transmits a response confirmation to the cordless telephone handset 4 in the control station transmission slot corresponding to the slot that has received the response notification to the cordless telephone handset 4 (S56). Thereafter, the reception of the slot that has received the response notification and the transmission of the slot that has transmitted the response confirmation are continued, and voice communication with the cordless telephone handset 4 is performed. In the example of FIG. 9, the voice signal from the doorphone master unit 2 b, that is, the front cordless handset 2 a is transmitted to the cordless telephone handset 4 in the slot 4 after S 56, and the cordless telephone handset 4 in the slot 8. A voice signal is received and output from the front door 2a. The description of the connection state of the voice path is the same as the operation of the cordless telephone device 3 described with reference to FIG.

  Further, when receiving the response notification from the cordless telephone cordless handset 4, the intercom master unit 2b transmits a call stop to the cordless telephone device 3 in the subordinate station transmission slot transmitting to the cordless telephone device 3 (S57). ), The reception of the dependent station reception slot receiving from the cordless telephone apparatus 3 is stopped (S58). Then, the operation of the slave station transmission slot that has been transmitting to the cordless telephone apparatus 3 is switched to the operation as the control station, that is, the reception operation as the standby slot (S59).

  Next, the operation of the cordless telephone device 3 will be described. When the cordless telephone apparatus 3 receives a call stop at the slot where the doorphone master unit 2b is receiving, the cordless telephone device 3 stops the notification of the doorphone call (S60), and transmits the slot that is transmitting to the doorphone master unit 2b. Is stopped (S61). Then, the slot that has received the intercom base unit 2b is switched to standby reception (S62).

  Next, when the incoming call detection unit 303 of the cordless telephone device 3 detects an incoming incoming call and responds with the cordless telephone handset 4, the state of communication between the doorphone master unit 2b and the cordless telephone device 3 and the cordless telephone handset 4 is indicated. This will be described with reference to FIG. Note that the initial state of the cordless telephone device 3, the doorphone master unit 2b, and the cordless telephone slave unit 4 in FIG. 10 is the end state described in FIG. 6, that is, the cordless telephone device 3 transmits a control signal in the main synchronization slot. While receiving the standby slot, the intercom master unit 2b receives the standby slot while transmitting the control signal in the sub-synchronization slot, and the cordless telephone handset 4 is receiving the main synchronization slot and the sub-synchronization slot. It is.

  First, an operation for detecting an incoming call and notifying an incoming call will be described. When the cordless telephone device 3 detects an incoming call from the outside line, it transmits a calling signal to the door phone base unit 2b and the cordless telephone handset 4 in the main synchronization slot (S70), and the notification unit 312 starts to notify the outside line incoming call. To do. On the other hand, when the cordless telephone cordless handset 4 receives the call signal in the main synchronization slot (S71), the notification unit 401 starts to notify the incoming of the outside line while maintaining the reception of the main synchronization slot and the sub synchronization slot. Similarly, when the intercom master unit 2b receives a call signal in the main synchronization slot (S72), the notification unit 205 starts notification of an incoming incoming call while maintaining reception of the main synchronization slot and transmission of the sub synchronization slot. (S72).

  Next, the operation when the cordless telephone cordless handset 4 responds to an incoming incoming call will be described. If the cordless telephone cordless handset 4 is informing the incoming of the incoming line while the operation unit 409 is responding to the incoming incoming call of the outside line, the reception of the main synchronization slot and the sub-synchronization slot is maintained while the reception of the main synchronization slot and the secondary synchronization slot is maintained. Select one of the transmission slots of the dependent stations excluding the slots corresponding to the main synchronization slot and the sub-synchronization slot from the transmission slots, and send a response notification (S80), stop the notification of the incoming line, and send the response notification The reception of the reception slot of the dependent station corresponding to the transmitted slot is started, and the response confirmation is received (S81). When the response confirmation is received, the voice path is connected, and thereafter, the voice of the user of the cordless telephone handset 4 input from the microphone of the call unit 403 is transmitted via the voice circuit 402, the frame processing unit 406, and the radio unit 407. The signal transmitted to the cordless telephone device 3 and received from the cordless telephone device 3 is output from the speaker of the telephone call unit 403 via the frame processing unit 406 and the voice circuit 402. In the example of FIG. 10, the voice signal from the cordless telephone handset 4 is transmitted in slot 7 after S81 while maintaining reception of the main synchronization slot (slot 1) and the sub synchronization slot (slot 2). 3, the cordless telephone device 3, that is, the voice signal from the caller is received and output from the cordless telephone handset 4.

  On the other hand, when the cordless telephone apparatus 3 receives a response notification from the cordless telephone handset 4 in the standby slot in a state in which the outside line is being notified, it starts control to start communication with the cordless telephone handset 4 (S85). ) Incoming call stop notification in the main synchronization slot (S86), response confirmation transmission in the control station transmission slot corresponding to the slot that received the response notification (S87), voice path is connected, and then the telephone The voice of the caller input from the line 5 is transmitted to the cordless telephone handset 4 via the line interface unit 301, the voice circuit 302, the frame processing unit 306, and the wireless unit 307, and the signal received from the cordless telephone handset 4 is received. The data is output to the telephone line 5 via the frame processing unit 306, the audio circuit 302, and the line interface unit 301. In the example of FIG. 10, the telephone line 5, that is, the voice signal from the caller is transmitted in the slot 3 after S 87, and the voice signal is received from the cordless telephone handset 4 in the slot 7. Is output.

  Also, when the doorphone master unit 2b receives the incoming call stop notification in the main synchronization slot, it stops the incoming line incoming notification (S88).

  Next, when the incoming call detection unit 303 of the cordless telephone device 3 detects an incoming incoming call and responds with the cordless telephone handset 4, the state of communication between the doorphone master unit 2b and the cordless telephone device 3 and the cordless telephone handset 4 is indicated. This will be described with reference to FIG. Note that the initial state of the cordless telephone device 3, the doorphone master unit 2b, and the cordless telephone slave unit 4 in FIG. 11 is the end state described in FIG. 6, that is, the cordless telephone device 3 transmits a control signal in the main synchronization slot. While receiving the standby slot, the intercom master unit 2b receives the standby slot while transmitting the control signal in the sub-synchronization slot, and the cordless telephone handset 4 is receiving the main synchronization slot and the sub-synchronization slot. It is. Note that the operation of detecting an incoming incoming call and notifying the incoming call is the same as (S70), (S71), and (S72) in FIG.

  First, an operation when the doorphone master unit 2b responds to an incoming line call will be described. When the operation unit 211 performs a response operation to the incoming external line while the incoming call is being notified by the intercom base unit 2b, the substation is maintained while maintaining the reception of the primary synchronization slot and the transmission of the secondary synchronization slot. The transmission notification of the dependent station is selected by selecting one of the transmission slots of the dependent stations, excluding the slots corresponding to the main synchronization slot and the sub-synchronization slot (S90). The reception of the reception slot of the dependent station corresponding to the slot that transmitted the message is started, and the response confirmation is received (S91). When the response confirmation is received, the voice path is connected, and thereafter, the voice of the user of the doorphone master unit 2b input from the microphone of the call unit 207 is transmitted via the voice circuit 206, the frame processing unit 209, and the radio unit 210. A signal transmitted to the cordless telephone device 3 and received from the cordless telephone device 3 is output from the speaker of the call unit 206 via the frame processing unit 210 and the voice circuit 206. In the example of FIG. 11, in the intercom base unit 2b, when a response operation is performed, the reception of the main synchronization slot (slot 1) and the transmission of the sub-synchronization slot (slot 2) are maintained, while the slot 3 and the slot 7 are dependent stations. After S91, the voice signal from the doorphone master unit 2b is transmitted in slot 7, and the voice signal from the cordless telephone device 3, that is, the caller is received in slot 3. Is output from the machine 2b.

  On the other hand, when the cordless telephone apparatus 3 receives a response notification from the doorphone master unit 2b in the standby slot in a state in which an incoming call is being notified, it starts control to start communication with the doorphone master unit 2b (S95), An incoming call stop notification is made in the main synchronization slot (S96), a response confirmation is sent in the control station transmission slot corresponding to the slot that received the response notice (S97), the voice path is connected, and then the telephone line 5 The voice of the caller input from the terminal is transmitted to the intercom base unit 2b via the line interface unit 301, the audio circuit 302, the frame processing unit 306, and the radio unit 307, and the signal received from the intercom base unit 2b is transmitted to the frame processing unit 306. , And output to the telephone line 5 through the voice circuit 302 and the line interface unit 301. In the example of FIG. 10, the voice signal from the telephone line 5, that is, the caller is transmitted in the slot 3 after S 97, and the voice signal is received from the doorphone master unit 2 b in the slot 7. Is output.

  When the cordless telephone handset 4 receives the incoming call stop notification in the main synchronization slot, it stops the incoming line incoming notification (S98).

  Next, the operation when an incoming call from the outside line and a call from the entrance terminal occur simultaneously will be described.

  First, an operation in the case where a door phone call occurs while an outside line is received will be described.

  When an outside line incoming call occurs, as described in (S70), (S71), and (S72) of FIG. 10 above, when the outside line incoming call is notified from the cordless telephone device 3 in the main synchronization slot, the doorphone main unit 2b Starts the notification of the incoming call while continuing to transmit the sub-synchronization slot, and the cordless telephone handset 4 starts the notification of the incoming call while continuing to receive the sub-synchronization slot. In this state, when the call detection unit 103 of the front door unit 2a of the doorphone master unit 2b detects a visitor's call, the doorphone master unit 2b sets the notification content of the notification unit 205 to a state of notifying an incoming line call and a doorphone call. As in (S21), (S22), and (S23) of FIG. 7 described above, a call signal is transmitted to the cordless telephone slave unit 4 in the sub-synchronization slot, and a pair of transmission / reception slots is set as a dependent station. The call is notified to the cordless telephone device 3 by switching to the above operation. On the other hand, when the cordless telephone handset 4 that has notified the incoming call of the outside line receives the calling signal from the doorphone master unit 2b, the cordless telephone handset 4 changes the notification content of the notification unit 401 to a state of notifying the incoming call of the outside line and the calling of the doorphone. Similarly, when the cordless telephone device 3 that has notified the incoming call of the outside line receives the call signal from the doorphone master unit 2b, the notification content of the notification unit 312 is changed to a state of notifying the incoming call of the outside line and the calling of the doorphone.

  Next, the operation when an outside line incoming call occurs while calling the door phone will be described.

  When the call detection unit 103 of the door station 2a of the door phone master unit 2b detects a visitor's call and the door phone is called, as described above with reference to (S21), (S22), and (S23) in FIG. The doorphone master unit 2b notifies the doorphone call by the notification unit 205, transmits a call signal to the cordless telephone handset 4 in the sub-synchronization slot while continuing to receive the main synchronization slot, and sets one transmission / reception slot The pair is switched to the operation as a dependent station, and the call is notified to the cordless telephone apparatus 3. And the cordless telephone cordless handset 4 will change the alerting | reporting content of the alerting | reporting part 401 to the state which alert | reports a doorphone call, if a call signal is received from the doorphone main | base station 2b. Similarly, when the cordless telephone device 3 receives a call signal from the doorphone master unit 2b, the cordless telephone device 3 changes the notification content of the notification unit 312 to a state in which the doorphone call is notified. In this state, when the cordless telephone device 3 detects an incoming call to the outside line, the cordless telephone device 3 changes the notification content of the notification unit 312 to a state in which the incoming line call and the door phone call are notified, (S70) in FIG. As in (S71) and (S72), the main line slot notifies the intercom master unit 2b and the cordless telephone slave unit 4 of incoming calls. On the other hand, when the cordless telephone handset 4 that has notified the doorphone call receives the notification of the incoming call from the cordless telephone device 3, the cordless telephone handset 4 changes the notification content of the notification unit 401 to a state of notifying the incoming call of the external line and the doorphone call. Similarly, when receiving the notification of the incoming call from the cordless telephone device 3, the doorphone master unit 2 b that has notified the doorphone call changes the notification content of the notification unit 205 to a state of notifying the incoming line call and the doorphone call.

  Next, an operation when a door phone call occurs during an outside line call will be described.

  First, an explanation will be given of the operation when a call of a door phone is generated while an external line call is being made by the cordless telephone handset 4.

  The operation until the cordless telephone handset 4 responds to the incoming call and the cordless telephone handset 4 and the caller make a call is the same as described above with reference to FIG. In the state where the cordless telephone handset 4 is performing, the cordless telephone handset 4 is communicating with the cordless telephone apparatus 3 while continuing to receive the sub-synchronization slot. In this state, when the call detection unit 103 of the front door unit 2a of the doorphone master unit 2b detects the visitor's call and the doorphone call is generated, (S21), (S22), (S23) in FIG. As described above, the intercom master unit 2b notifies the intercom call by the notification unit 205, transmits a call signal to the cordless telephone slave unit 4 in the sub-synchronization slot, and sets a pair of transmission / reception slots as subordinate stations. The call is notified to the cordless telephone device 3 by switching to the above operation. And the cordless telephone cordless handset 4 will change the alerting | reporting content of the alerting | reporting part 401 to the state which alert | reports a doorphone call, if a call signal is received from the doorphone main | base station 2b. Further, the cordless telephone cordless handset 4 may output a notification sound for superimposing on the voice during an outside line call from the speaker of the call unit 403 or stopping the voice during the outside line call and notifying the door phone. When a cordless telephone cordless handset 4 responds to a door phone call during an outside line call, the operation unit 409 performs an operation for holding the outside line call or an operation for disconnecting the outside line call. Responds to a call. Thereafter, the doorphone master unit 2b and the cordless phone slave unit 4 are connected in the same manner as the operation when the cordless phone slave unit 4 responds to the doorphone call described with reference to FIG. Similarly, when a call of a door phone occurs while an external line call is being made by the cordless telephone cordless handset 4, when the cordless telephone device 3 receives a call signal from the door phone parent machine 2b, the notification content of the notification unit 312 is displayed. It changes to the state which alert | reports an intercom call. Then, when a response operation to the doorphone call is performed by the operation unit 311 of the cordless telephone device 3, the doorphone described with reference to FIG. 8 described above is continued while continuing the processing during the connection between the cordless telephone handset 4 and the external line call. The doorphone master unit 2b and the cordless telephone device 3 are connected in the same manner as when the cordless telephone device 3 responds to the call.

  Next, an operation when an outside line incoming call occurs during doorphone communication will be described.

  First, an operation when an outside line incoming call occurs while the cordless telephone handset 4 is making a call with a door phone will be described.

  The operation until the visitor who has operated the cordless telephone handset 4 and the entrance handset 2b responds to the call of the door phone and makes a call is the same as described with reference to FIG. In a state where the cordless telephone handset 4 is making a call with the doorphone base unit 2b, the cordless telephone handset 4 is communicating with the doorphone base unit 2b while continuing to receive the main synchronization slot. In this state, when the incoming line detection unit 303 of the cordless telephone device 3 detects an incoming call and an external incoming call occurs, the cordless telephone device as described in (S70), (S71), and (S72) of FIG. 3 notifies the outside line incoming call by the notification unit 312 and starts the notification of the external line incoming call to the doorphone master unit 2b and the cordless telephone slave unit 4 in the main synchronization slot. And the cordless telephone cordless handset 4 will change the alerting | reporting content of the alerting | reporting part 401 to the state which alert | reports an external line incoming call, if the notification of an external line incoming call is received from the cordless telephone apparatus 3. FIG. Further, the cordless telephone handset 4 outputs a notification sound for superimposing on the voice during a call with the door phone side from the speaker of the call unit 403 or stopping the voice during a call with the door phone side and notifying an incoming line. You may do it. When the cordless telephone cordless handset 4 responds to an incoming incoming call during communication with the doorphone, the operation unit 409 performs an operation for holding the communication with the doorphone or an operation for cutting off the communication with the doorphone. A response operation for an incoming call from the telephone device 3 is performed. Thereafter, the cordless telephone device 3 and the cordless telephone handset 4 are connected in the same manner as the operation when the cordless telephone handset 4 responds to the incoming call described with reference to FIG. Similarly, when an outside line incoming call occurs during the doorphone communication in the cordless telephone cordless handset 4, the cordless telephone apparatus 3 changes the notification content of the notification unit 312 to a state of notifying the outside line incoming call. When an operation for responding to an incoming call is performed at the operation unit 311 of the cordless telephone device 3, the notification of the incoming call from the notification unit 312 is stopped, and the caller is transmitted via the line interface unit 301, the voice circuit 302, and the call unit 313. And the telephone of the cordless telephone device 3 is started.

  Next, a registration operation between the cordless telephone device 3 and the door phone device 2 will be described.

  Since the door phone device 2 operates as a dependent station of the cordless telephone device 3, it is necessary to store and hold mutual identification information (ID). When an operation for starting the registration operation is performed on the operation unit 211 of the door phone device 2, the control unit 214 starts control of the registration operation. When the registration operation is started in the doorphone device 2, the doorphone master unit 2b first starts continuous reception. When the control signal transmitted from the cordless telephone device 3 is received, the doorphone master unit 2b stops the continuous reception, and the slot included in the control signal. Based on information such as numbers, frame and slot synchronization with the cordless telephone base unit 3 is established. Then, except for the slot that has received the control signal from the cordless telephone device 3, one set of transmission / reception slots is selected, the selected slot is operated as a subordinate station, and the selected transmission slot, that is, the cordless telephone device 3 is waiting. In the slot, the cordless telephone device 3 transmits a registration request including the identification information of the own device stored in the door phone ID storage unit 216, and waits for reception of registration acceptance. When the registration acceptance is received, the identification information of the cordless telephone apparatus 3 included in the registration acceptance is stored in the telephone master ID storage unit 215, and the operation as the sub control station is started. The door phone device 2 stops transmission / reception with the cordless telephone device 3 during communication when the registration request cannot be received even if reception is continued for a certain period of time after the registration request is transmitted, or when registration is not possible. Continuous reception is performed again, and the registration operation to another cordless telephone device 3 is performed.

  On the other hand, when an operation for starting a registration operation is performed at the operation unit 311 of the cordless telephone device 3, the control unit 320 starts controlling the registration operation and operates to accept a registration request from the door phone device 2 for a certain period of time. . When the registration request from the door phone device 2 is received in a state where the registration request from the door phone device 2 of the cordless telephone device 3 can be received, the telephone master unit ID is stored in the control station transmission slot corresponding to the slot that has received the registration request. The registration reception including the identification information of the own device stored in the unit 305 is transmitted, and the identification information included in the registration request, that is, the identification information of the transmission source doorphone device 2 is stored in the doorphone ID storage unit 310. . When the cordless telephone device 3 receives a registration request from the door phone device 2 in a state where the registration request from the door phone device 2 of the cordless telephone device 3 cannot be accepted, the cordless telephone device 3 transmits a control station corresponding to the slot that has accepted the registration request. Send registration impossible in the slot.

  Next, the case where the door phone device 2 operates in the same manner as the main control station will be described.

  The door phone device 2 does not operate as a sub-control station when the identification information stored in the telephone base unit ID storage unit 215 is not set (for example, the identification information is ALL0) when the power is turned on, that is, at the start of operation. Control of frame and slot of time division communication at its own timing, select one of control station transmission slots, transmit control signal, and control excluding slot corresponding to slot for transmitting control signal The station reception slot is used as a standby slot to wait for a radio signal from the subordinate station, that is, the cordless telephone handset 4.

  In addition, when the identification information stored in the telephone master ID storage unit 215 is set when the power is turned on, that is, when the operation is started, the door phone device 2 can be used as described above with reference to FIG. 6 (S3). The cordless telephone device 3 stored in the base unit ID storage unit 215 is searched, but the control signal of the cordless telephone unit 3 stored in the telephone base unit ID storage unit 215 is received even if continuous reception is continued for a certain time. If not, stop continuous reception, determine the frame and slot timing of time division communication at its own timing, select one of the control station transmission slots, and transmit the control signal, as described above The control station reception slot excluding the slot corresponding to the slot for transmitting the control signal is used as a standby slot to wait for a radio signal from the slave station, that is, the cordless telephone handset 4.

  Also, when the door phone device 2 fails to receive the main synchronization slot for a certain period of time after receiving the main synchronization slot of the cordless telephone device 3 stored in the telephone base unit ID storage unit 215 and starting operation as a sub-control station. Then, the device itself is restarted to restart the search for the cordless telephone device 3 when the power is turned on.

  Next, a method for transmitting and receiving a visitor's video during a doorphone call and a telephone call will be described.

  When the call detection unit 103 of the door phone 2a of the door phone device 2 detects a call, the image taken by the camera unit 101 is transmitted, the monitor 202 of the door phone parent device 2b, the notification unit 312 of the cordless telephone device 3, the cordless phone You may operate | move so that the image of a visitor may be displayed on the monitor 414 of the subunit | mobile_unit 4. FIG.

  When the call detection unit 103 of the entrance cordless handset 2b of the door phone device 2 detects the call, the control unit 214 activates the camera unit 101 and starts photographing the visitor. An image photographed by the camera unit 101 is output to the intercom base unit 2 b via the demultiplexing circuit 104 and output to the monitor circuit 201 via the demultiplexing circuit 220. In the monitor circuit 201, the image sent from the entrance cordless handset 2a is output to the monitor 202, and the image sent from the entrance cordless handset 2a is displayed on the monitor 202. In addition, the monitor circuit 201 outputs the image sent from the entrance cordless handset 2 a to the image information storage unit 203. The image information storage unit 203 converts the input image into a digital image such as a JPEG image at a timing instructed by the control unit 214, and stores the image information. On the other hand, when the call detecting unit 103 of the front cordless handset 2b of the door phone device 2 detects a call, the control unit 214 sends the cordless telephone device 3 and the cordless telephone handset 4 from the door phone side as described in FIG. The call is notified, and the call of the doorphone is notified by the cordless telephone device 3 and the cordless telephone handset 4. At this time, the call of the doorphone of the cordless telephone device 3 and the cordless telephone handset 4 is notified and the image information storage unit The image information (hereinafter referred to as a digital image) obtained by digitizing the video data from the entrance cordless handset 2a stored in 203 is transmitted to the notification unit 312 of the cordless phone device 3 and the monitor 414 of the cordless phone cordless handset 4. An operation is performed so as to display image information obtained by digitizing video data received from the entrance slave unit 2a received from 2b.

  First, the operation of transmitting image information from the doorphone master unit 2a to the cordless telephone slave unit 4 will be described. The control unit 214 transmits a digital image obtained by digitizing the video data from the entrance handset 2a stored in the image information storage unit 203 to the cordless telephone handset 4 using the sub-synchronization slot. When the control unit 214 detects the call of the visitor, the control unit 214 uses a format having both the control data field and the information data field shown in FIG. Then, a call signal is transmitted to the cordless telephone handset 4. Then, the control unit 214 activates the camera unit 101 and instructs the image information storage unit 203 to convert an image. Then, the control unit 214 reads the digital image converted by the image information storage unit 203 and outputs the digital image to the frame processing unit 209 in accordance with the transmission timing of the sub-synchronization slot so that the digital image is transmitted in the information data field of the sub-synchronization slot. . The frame processing unit 209 sets the digital image in the information data field of the sub-synchronization slot, adds the check code CRC2 of the information data field, and sends it to the radio unit 210 together with the synchronization signal, the control field, and the check code CRC1 of the control data field. The wireless unit 210 transmits a wireless signal in which digital image information is set in the information data field in the sub-synchronization slot. When the transmission of the digital image for one screen that has been converted and stored in the image information storage unit 203 is completed, the control unit 214 instructs the image information storage unit 203 to convert the image again and updates the digital image. The updated digital images are sequentially read and transmitted.

  On the other hand, the cordless telephone handset 4 receives the sub-synchronization slot in the standby state, and when receiving the doorphone call notification in the sub-synchronization slot, the doorless call is notified from the notification unit 401, for example, a ping-pong notification sound. Sound to notify the user. Then, a digital image sent from the doorphone master unit 2b, that is, an image of a visitor photographed by the camera unit 101 of the entrance cordless handset 2a is displayed on the monitor 414. That is, when receiving a call signal for notifying door phone call in the control field of the sub-synchronization slot, the control unit 410 controls the radio unit 407 and the frame processing unit 406 to receive the information field of the sub-synchronization slot and CRC2. The frame processing unit 406 separates the information field and CRC2 from the demodulated data received and demodulated in the sub-synchronization slot based on the synchronization signal, detects the reception error based on the CRC2, and is received correctly The received information field data is output to the control unit 410. Then, the control unit 410 decodes the received data in the information field, converts it to the original image, outputs it to the monitor circuit 404, and displays the image on the monitor 414. When the digital image data received by the control unit 410 is decoded, if a reception error occurs and a part of the digital image information is missing, the image corresponding to the missing data portion is displayed in white. Control is performed to decode the image data, and generate and display one image with a part of the image.

  Next, an operation of transmitting image information from the doorphone master unit 2a to the cordless telephone device 3 will be described. The control unit 214 performs the above-described control, and notifies the cordless telephone device 3 of the door phone call while transmitting the image captured by the camera unit 101 to the cordless telephone handset 4 using the sub-synchronization slot. An image captured by the camera unit 101 is transmitted using the activated wireless slot. When the door phone base unit 2a and the cordless telephone apparatus 3 detect a call of a visitor, mutual wireless communication is started by the control of (S22), (S23), (S24), and (S25) in FIG. The doorphone call is notified to the cordless telephone device 3 from the doorphone master unit 2a. At this time, the format having both the control data field and the information data field shown in FIG. 5 is used, and a call signal for notifying the door phone call is placed in the control data field, and the call signal is transmitted to the cordless telephone device 3. The digital image stored and held in the image information storage unit 203 is placed in the data field, and the image captured by the camera unit 101 is transmitted to the cordless telephone device 3. That is, the control unit 214 establishes a wireless link between the doorphone master unit 2a and the cordless telephone device 3 for notifying the call of the doorphone, and when mutual wireless communication is started, the image information storage unit 203 converts it. The digital image is read, and the digital image is output to the frame processing unit 209 in accordance with the transmission timing of the corresponding slot so as to be transmitted in the information data field of the communication slot. The frame processing unit 209 sets the digital image in the information data field of the corresponding slot, adds the check code CRC2 of the information data field, and outputs it to the radio unit 210 together with the synchronization code, the control field, and the check code CRC1 of the control data field. The wireless unit 210 transmits a wireless signal in which digital image information is set in the information data field in the sub-synchronization slot. The digital image transmitted to the cordless telephone device 3 may be the same as the digital image transmitted to the cordless telephone handset 4. When transmitting the same digital image, the control unit 214 reads the digital image stored in the image information storage unit 203 in accordance with the timing of the sub-synchronization slot and the transmission slot to the cordless telephone device 3, and the frame processing unit 209. Output to. When the control unit 214 completes transmission of the digital image for one screen converted and stored in the image information storage unit 203 to both the cordless telephone device 3 and the cordless telephone handset 4, the control unit 214 stores the image information again. The unit 203 is instructed to convert the image, and is controlled to update the digital image. The updated digital image is sequentially read and transmitted.

  On the other hand, the cordless telephone device 3 receives a standby slot in the standby state, receives a doorphone call notification in the standby slot, and establishes a wireless link with the cordless telephone device 3, and then notifies the doorphone call. From 312, for example, a notification sound of ping-pong is sounded to notify the user. Then, a digital image sent from the doorphone master unit 2b, that is, an image of a visitor photographed by the camera unit 101 of the entrance cordless handset 2a is displayed on the monitor 315. That is, when receiving the call signal for notifying the doorphone call in the control field of the standby slot, the control unit 320 receives the information field and CRC2 of the standby slot (hereinafter referred to as a communication slot) that has received the doorphone call. In step 307, the frame processing unit 306 is controlled to start an operation to establish a wireless link with the cordless telephone device 3. The frame processing unit 306 separates the information field and CRC2 from the demodulated data received and demodulated in the communication slot, based on the synchronization signal, detects a reception error based on the CRC2, and if received correctly, The received information field data is output to control section 320. Then, the control unit 320 decodes the received data in the information field, converts it into the original image, outputs it to the monitor circuit 314, and displays the image on the monitor 315. When the digital image data received by the control unit 3200 is decoded, if a reception error occurs and a part of the digital image information is missing, the image corresponding to the missing data portion is displayed in white. Control is performed to decode the image data, and generate and display one image with a part of the image.

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

  In this embodiment, an example in which the cordless telephone device is the main control station and the door phone device is the sub control station is shown, but the cordless telephone device may be the sub control station and the door phone device may be the main control station.

  In the present embodiment, only one doorphone master unit of the doorphone device is provided as the sub-control station. However, for example, two or more doorphone devices may be provided as in a second-generation house. In that case, since there are two or more sub-control stations, each sub-control station in the transmission slot excluding the main sync slot is controlled so that the sub-synchronization slots transmitting control information do not overlap each other. By assigning the sub-synchronization slot, the wireless slave unit can communicate with the main control station and all the sub-control stations.

  In the present embodiment, only one wireless slave unit is provided as a dependent station. However, a plurality of wireless slave units may be provided.

  In the present embodiment, an example in which a wireless slave unit operating as a dependent station receives both a cordless telephone device and a door phone device operating as a control station has been shown. You may do it. For example, when the cordless telephone device operates as the main control station and the door phone device operates as the sub control station, the wireless slave unit receives only the main synchronization slot, receives the control signal of the cordless telephone device, and the door phone is called In the same manner as in the embodiment, the doorphone device notifies the cordless telephone device of the doorphone call, and the doorphone device notifies the doorphone call in the main synchronization slot, thereby receiving only the main synchronization slot. Is notified of the door phone call. Similarly, the cordless telephone device operates as the main control station and the door phone device operates as the sub control station, and the wireless slave unit receives only the sub synchronization slot and receives the control signal of the door phone device, and an outside line incoming call occurs. In the same manner as in the embodiment, the cordless telephone device notifies the outside line arrival in the main synchronization slot, and the door phone device receives the outside line arrival notification in the main synchronization slot. By notifying, an external line incoming call is notified to the wireless slave unit that receives only the sub-synchronization slot. When the wireless slave unit receives only one synchronization slot in this way, it is notified from the control station that is waiting for a call from the other (outside line incoming call, door phone call), and the wireless slave unit performs a response operation to the call. If it is performed, the wireless slave unit receives the other control signal in the reception slot of the dependent station, establishes a direct radio link with the caller, and performs response processing.

  In the present invention, the sub-control station performs the operation as the control station and the operation as the dependent station, so that the cordless telephone, the wireless door phone, and the wireless slave unit are connected to each other by a wireless signal, and the communication quality is reduced due to the wireless interference. Since a shortage of radio resources can be reduced, the present invention is suitable for a radio communication system including a cordless telephone and a radio doorphone in which a control station and a dependent station communicate with each other by time division multiplexing.

The figure which shows the structure of the radio | wireless communications system which concerns on embodiment of this invention The figure explaining the structure of the door phone apparatus which concerns on embodiment of this invention The figure explaining the structure of the cordless telephone main | base station of the cordless telephone apparatus which concerns on embodiment of this invention The figure explaining the structure of the cordless telephone cordless handset of the cordless telephone apparatus which concerns on embodiment of this invention Diagram explaining the format of packet data The figure explaining the state of the transmission slot and reception slot at the time of communicating in the radio | wireless communications system which concerns on embodiment of this invention The figure explaining the state of the transmission slot and reception slot at the time of communicating in the radio | wireless communications system which concerns on embodiment of this invention The figure explaining the state of the transmission slot and reception slot at the time of communicating in the radio | wireless communications system which concerns on embodiment of this invention The figure explaining the state of the transmission slot and reception slot at the time of communicating in the radio | wireless communications system which concerns on embodiment of this invention The figure explaining the state of the transmission slot and reception slot at the time of communicating in the radio | wireless communications system which concerns on embodiment of this invention The figure explaining the state of the transmission slot and reception slot at the time of communicating in the radio | wireless communications system which concerns on embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Wireless communication system 2 Door phone apparatus 2a Entrance cordless handset 2b Door phone master phone 3 Cordless telephone device 4 Cordless telephone cordless handset 5 Telephone line 101 Camera part 102 Calling part 103 Call detection part 104 Demultiplexing circuit 201 Monitor circuit 202 Monitor 203 Image information storage Unit 204 Call detection unit 205 Notification unit 206 Voice circuit 207 Calling unit 208 Synchronization processing unit 209 Frame processing unit 210 Radio unit 211 Operation unit 213 Antenna 214 Control unit 215 Telephone master unit ID storage unit 216 Door phone ID storage unit 217 Slave unit ID storage Unit 220 demultiplexing circuit 301 line interface unit 302 voice circuit 303 incoming call detection unit 304 slave unit ID storage unit 305 telephone base unit ID storage unit 306 frame processing unit 307 radio unit 308 antenna 310 door phone ID description Memory unit 311 Operation unit 312 Notification unit 313 Communication unit 314 Monitor circuit 315 Monitor 320 Control unit 401 Notification unit 402 Audio circuit 403 Communication unit 404 Monitor circuit 405 Synchronization processing unit 406 Frame processing unit 407 Radio unit 408 Antenna 409 Operation unit 410 Control unit 411 Slave unit ID storage unit 412 Telephone master unit ID storage unit 413 Door phone ID storage unit 414 Monitor

Claims (14)

A wireless communication system composed of a cordless telephone and a wireless doorphone comprising a wireless communication device for performing wireless communication between a control station and a dependent station,
The control station of the cordless telephone includes a transmission unit that transmits a radio signal, a reception unit that receives a radio signal, and a control unit that controls the entire apparatus,
The radio intercom control station includes a transmission unit that transmits a radio signal, a reception unit that receives a radio signal, and a control unit that controls the entire apparatus,
One of the control station of the cordless telephone and the control station of the wireless door phone operates as a main control station that performs radio communication with its own subordinate station, and the other operates as a subordinate station of the main control station. A radio communication system characterized by operating as a sub-control station that performs radio communication and controlling the sub-control station to operate as a control station that performs communication with its subordinate stations. The wireless communication system according to claim 1, wherein the sub control station operates as a main control station when a radio signal transmitted by the main control station cannot be received. The control station for the wireless doorphone and the control station for the cordless telephone are provided with an input means for registration operation, and by registering one control station as the other dependent station, the control station that has registered as the dependent station is the substation. 3. The wireless communication system according to claim 1, wherein control is performed so as to perform an operation as a control station. Performs time division multiplex communication, the control station transmits a control signal that serves as a reference for time division multiplexing time, the dependent station receives the control signal and performs time division multiplexing time synchronization with the control station, A wireless communication system composed of a cordless telephone and a wireless doorphone comprising a wireless communication device for performing wireless communication between dependent stations,
The control station of the cordless telephone includes a transmitting unit that transmits a radio signal, a receiving unit that receives a radio signal, a frame processing unit that performs time-division multiplexing control of transmission / reception signals, and a control unit that controls the entire apparatus. Prepared,
The wireless intercom control station includes a transmission unit that transmits a radio signal, a reception unit that receives a radio signal, a frame processing unit that performs time division multiplexing control of transmission and reception signals, and a control unit that controls the entire apparatus. Prepared,
One of the control units performs control as a main control station that operates at its own timing, and the frame processing unit of the main control station operates to transmit a control signal at its own timing,
The other control unit receives a control signal transmitted from the main control station, performs control as a dependent station that operates at the timing of the main control station and performs wireless communication with the main control station, and transmits the control signal transmitted from the main control station It performs control as a sub-control station that operates at a signal reception timing, and the frame processing unit of the sub-control station operates to transmit a control signal according to the reception timing of the control signal transmitted by the main control station. The wireless communication system according to any one of claims 1 to 3, wherein the wireless communication system is characterized. A wireless communication system composed of a cordless telephone and a wireless doorphone comprising a wireless communication device for performing wireless communication between a control station and a dependent station,
The control station of the cordless telephone includes a transmission unit that transmits a radio signal, a reception unit that receives a radio signal, and a control unit that controls the entire apparatus,
The radio intercom control station includes a transmission unit that transmits a radio signal, a reception unit that receives a radio signal, and a control unit that controls the entire apparatus,
The slave station that operates as a slave station of the cordless telephone control station and the wireless doorphone control station includes a transmitter that transmits radio signals, a receiver that receives radio signals, and a controller that controls the entire apparatus. With
One of the control station of the cordless telephone and the control station of the wireless door phone operates as a main control station that performs radio communication with its own subordinate station, and the other operates as a subordinate station of the main control station. The sub-control station operates as a sub-control station that performs wireless communication, and the sub-control station operates as a control station that communicates with its subordinate station. A wireless communication system, wherein control is performed to perform wireless communication. Performs time division multiplex communication, the control station transmits a control signal that serves as a reference for time division multiplexing time, the dependent station receives the control signal and performs time division multiplexing time synchronization with the control station, A wireless communication system composed of a cordless telephone and a wireless doorphone comprising a wireless communication device for performing wireless communication between dependent stations,
The control station of the cordless telephone includes a transmitting unit that transmits a radio signal, a receiving unit that receives a radio signal, a frame processing unit that performs time-division multiplexing control of transmission / reception signals, and a control unit that controls the entire apparatus. Prepared,
The wireless intercom control station includes a transmission unit that transmits a radio signal, a reception unit that receives a radio signal, a frame processing unit that performs time division multiplexing control of transmission and reception signals, and a control unit that controls the entire apparatus. Prepared,
A dependent station that operates as a dependent station of the control station of the cordless telephone and the control station of the wireless door phone includes a transmission unit that transmits a radio signal, a frame processing unit that performs time division multiplexing control of a transmission / reception signal, A receiving unit that performs reception and a control unit that controls the entire apparatus,
One of the control units performs control as a main control station that operates at its own timing, and the frame processing unit of the main control station operates to transmit a control signal at its own timing,
The other control unit receives a control signal transmitted from the main control station, performs control as a dependent station that operates at the timing of the main control station and performs wireless communication with the main control station, and transmits the control signal transmitted from the main control station Control as a sub-control station that operates at the reception timing of the signal, the frame processing unit of the sub-control station operates to transmit a control signal according to the reception timing of the control signal transmitted by the main control station,
The control unit of the dependent station receives a control signal transmitted from the main control station and the sub control station, and when the main control station or the sub control station and the dependent station perform wireless communication, the frame of the dependent station 6. The radio according to claim 5, wherein the processing unit operates to perform time-division multiplexing control of transmission / reception signals in accordance with a reception timing of a control signal transmitted by the main control station or the sub control station that performs radio communication. Communications system. The dependent station includes a notification unit for notifying a call and an input unit for responding to the call,
When a call signal is received from the main control station or the sub control station, the control unit of the subordinate station performs control to notify the call from the main control station or the sub control station from the notification unit, and calls from the input unit. 7. The wireless communication system according to claim 5, wherein when a response operation is performed, control is performed such that direct wireless communication is performed with the main control station or the sub control station that has transmitted the call signal. A communication system of a wireless communication system composed of a cordless telephone and a wireless doorphone comprising a wireless communication device that performs wireless communication between a control station and a dependent station,
The control station of the cordless telephone includes a step of operating as a control station and communicating with a dependent station,
The wireless intercom control station comprises a step of operating as a control station and communicating with a dependent station,
One of the control station of the cordless telephone and the control station of the wireless door phone operates as the other dependent station to perform wireless communication between the control stations. 9. The communication system according to claim 8, wherein the one control station does not perform the step of operating as the other dependent station when the radio signal transmitted by the other control station cannot be received. The wireless doorphone control station and the cordless telephone control station include a step of performing a registration operation. After the step of registering one control station as the other dependent station, one operates as the other dependent station. The communication method according to claim 8 or 9, wherein a step of performing wireless communication between the control stations is performed. Performs time division multiplex communication, the control station transmits a control signal that serves as a reference for time division multiplexing time, the dependent station receives the control signal and performs time division multiplexing time synchronization with the control station, And a communication system of a wireless communication system composed of a cordless telephone and a wireless doorphone that are wireless communication devices that perform wireless communication between dependent stations,
The control station of the cordless telephone includes a step of operating as a control station to communicate with a dependent station, and a step of performing time-division multiplexing control of transmission / reception signals,
The wireless intercom control station includes a step of operating as a control station to communicate with a dependent station, and a step of performing time-division multiplexing control of transmission / reception signals,
Any one of the above comprises a step of transmitting a control signal at its own timing,
11. The communication system according to claim 8, further comprising: a step of receiving the control signal; and a step of transmitting a control signal according to a reception timing of the received control signal. A communication system of a wireless communication system composed of a cordless telephone and a wireless doorphone comprising a wireless communication device that performs wireless communication between a control station and a dependent station,
The control station of the cordless telephone includes a step of operating as a control station and communicating with a dependent station,
The wireless intercom control station comprises a step of operating as a control station and communicating with a dependent station,
A dependent station that operates as a dependent station of the cordless telephone control station and the wireless doorphone control station comprises the steps of operating as a dependent station and communicating with the cordless telephone control station and the wireless doorphone control station;
One of the control station of the cordless telephone and the control station of the wireless door phone operates as the other dependent station to perform wireless communication between the control stations. Performs time division multiplex communication, the control station transmits a control signal that serves as a reference for time division multiplexing time, the dependent station receives the control signal and performs time division multiplexing time synchronization with the control station, And a communication system of a wireless communication system composed of a cordless telephone and a wireless doorphone that are wireless communication devices that perform wireless communication between dependent stations,
The control station of the cordless telephone includes a step of operating as a control station to communicate with a dependent station, and a step of performing time-division multiplexing control of transmission / reception signals,
The wireless intercom control station includes a step of operating as a control station to communicate with a dependent station, and a step of performing time-division multiplexing control of transmission / reception signals,
Any one of the above comprises a step of transmitting a control signal at its own timing,
The other includes a step of receiving the control signal and a step of transmitting a control signal according to a reception timing of the received control signal,
A dependent station operating as a dependent station of the cordless telephone control station and the wireless doorphone control station receives the control signal transmitted by the cordless telephone control station and the wireless doorphone control station;
When the main control station or the sub control station and the subordinate station perform radio communication, the subordinate station transmits / receives a signal according to the reception timing of the control signal transmitted by the main control station or the sub control station that performs radio communication. 13. The communication system according to claim 12, further comprising a step for performing the time division multiplexing control. When the dependent station receives a call signal from the main control station or the sub control station, the subordinate station notifies the call from the main control station or the sub control station, and the main control station that has transmitted the call signal by a response operation during the call or 14. The communication method according to claim 12, further comprising a step of starting direct wireless communication with the sub-control station.

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