JP7170211B2 - wireless communication system - Google Patents

Description

The present invention relates to a wireless communication system comprising a first control station, a second control station, and dependent stations, and performing wireless communication between each device.

In recent years, the development of radio technology has been remarkable, and a DECT (Digital Enhanced Cordless Telecommunications) (ETSI registered trademark) communication system using time-division multiplexing has been proposed. progressing. In Japan as well, the DECT communication method has been approved, and its standardization (see Non-Patent Document 1) is underway, and cordless telephones and wireless intercoms operating with DECT time-division multiplex communication have been commercialized.

For example, Patent Document 1 discloses a wireless communication system including a cordless telephone, a wireless intercom, and a wireless handset using a time-division multiplex communication system. The wireless communication system described in Patent Document 1 is composed of a cordless telephone device operating as a main control station, an intercom device operating as a sub-control station, and a wireless handset operating as a dependent station. The sub control station receives the control signal transmitted by the main control station, synchronizes frames and slots with the main control station, and transmits the control signal. During standby, the dependent station receives both the control signal transmitted from the main control station and the control signal transmitted from the sub control station, and receives an incoming call from the cordless telephone device and a visitor notification from the door phone device. and receive image information. These wireless communication systems operate according to the same wireless communication method, and transmit control signals and perform wireless communication between devices using a carrier frequency selected from carrier frequencies assigned according to the wireless communication method. By doing so, each communication was guaranteed, and compatibility between old and new models was ensured.

As described above, in a wireless communication system in which wireless communication devices that provide different services, such as the cordless telephone device and door phone device described in Patent Document 1, operate as one wireless communication system, each wireless communication device They are sold separately, and the user selects a combination of each wireless communication device in consideration of usage and price to construct a wireless communication system. When a new model of each wireless communication device is put on the market, a user who wants to use the new functions supported by the new model replaces only the wireless communication device.

JP 2006-352411 A

Radio Equipment for Radio Stations of Time Division Multiple Access Broadband Digital Cordless Telephone Standard ARIB STD-T101 Version 2.0

Carrier frequencies for wireless communication are determined by laws and standards for each region (country). In Japan, five carrier frequencies of 1895.616 MHz, 1897.344 MHz, 1899.072 MHz, 1900.8 MHz and 1902.528 MHz were initially allocated as carrier frequencies for the DECT system. , 1904.256 MHz were newly allocated. Then, as shown in Non-Patent Document 1, carrier numbers shown in Table 1 were assigned to respective carrier frequencies.

Therefore, when a carrier that can be used is added in the middle like the DECT system in Japan, wireless communication devices that provide different services, such as a cordless telephone device and a door phone device, operate as one wireless communication system. In a communication system, the compatibility between devices that support the added carrier and devices that do not support the added carrier in the control of the carrier frequency causes combination restrictions, and selection of combinations when purchasing a wireless communication system. This narrows the options for equipment when replacing equipment in wireless communication systems.

The present invention has been devised to improve such prior art, and its main purpose is to provide a wireless communication system comprising a first control station, a second control station, and dependent stations. , and to provide a wireless communication system in which wireless communication within the system is possible without causing trouble even if carrier frequencies available for each are different.

A radio communication system according to one aspect of the present invention includes a first control station, a second control station, and a dependent station, and each device is connected to a first carrier frequency group or a second carrier frequency group. A radio communication system that performs radio communication by time-division multiplex communication using carrier frequencies belonging to, wherein the first carrier frequency group is composed of at least one carrier frequency, and the second carrier frequency group is composed of the composed of at least one carrier frequency excluding carrier frequencies belonging to a first carrier frequency group, and the first control station determines whether or not communication is possible on a carrier frequency belonging to the second carrier frequency group The second control station receives the first control signal, operates in synchronization with the first control station, and operates on the second carrier frequency broadcast a second control signal including information indicating whether or not communication on a carrier frequency belonging to the group is possible, and the dependent station receives the first control signal and synchronizes with the first control station and receives the second control signal, operates in synchronization with the second control station, and communicates at a carrier frequency belonging to the second carrier frequency group with the first control signal is possible, and when the second control signal reports that communication is not possible on carrier frequencies belonging to the second carrier frequency group, the first control station sends the transmitting to the first control station a third control signal including information indicating that communication on carrier frequencies belonging to a second carrier frequency group is not possible, wherein the first control station receives from the dependent station The first control signal is transmitted using a carrier frequency belonging to the first carrier frequency group when the third control signal is received.

According to the present invention, the carrier frequencies that can be used by the first control station and the second control station are reported, and if the carrier frequency that cannot be used by the second control station can be used by the first control station, the dependent station notifies the first control station that there is a carrier frequency that cannot be used, and the first control station does not transmit control signals using the carrier frequency notified that it cannot be used. Even if the carrier frequencies that can be used by one control station and the second control station are different, radio communication within the radio communication system can be performed without causing any trouble.

1 is a diagram showing the configuration of a wireless communication system according to a first embodiment; FIG. FIG. 1 is a block diagram showing a configuration example of a cordless telephone base unit according to the first embodiment; 1 is a block diagram showing a configuration example of a wireless slave device according to a first embodiment; FIG. FIG. 2 is a block diagram showing a configuration example of a doorphone base unit according to the first embodiment; 3 is a flow chart showing an operation example of a cordless telephone base unit of a wireless communication system according to the first embodiment; 3 is a flow chart showing an example of operation of a wireless slave device in a wireless communication system according to the first embodiment; 3 is a flow chart showing an operation example of a doorphone master unit of the wireless communication system according to the first embodiment; 4 is a flow chart showing an operation example of wireless slave unit registration operation of a doorphone master unit of the wireless communication system according to the first embodiment; 4 is a flow chart showing an operation example of a cordless phone registration operation of a doorphone base unit of a wireless communication system according to the first embodiment; A sequence diagram showing an operation example of a cordless telephone master unit and wireless slave unit compatible with 6 carriers and a door intercom master unit compatible with 5 carriers in the first embodiment. A sequence diagram showing an operation example of a cordless telephone master unit and a doorphone master unit compatible with 6 carriers and a radio slave unit compatible with 5 carriers in the first embodiment.

A radio communication system of a first invention, which has been made to solve the above problems, is composed of a first control station, a second control station, and a dependent station, and each device mutually transmits a first carrier frequency group or A radio communication system that performs radio communication by time division multiplex communication using carrier frequencies belonging to a second carrier frequency group, wherein the first carrier frequency group is composed of at least one carrier frequency, and the second The carrier frequency group is composed of at least one carrier frequency excluding the carrier frequencies belonging to the first carrier frequency group, and the first control station controls the carrier frequencies belonging to the second carrier frequency group A first control signal including information indicating whether or not communication is possible is broadcast, and the second control station receives the first control signal and operates in synchronization with the first control station. , broadcasting a second control signal including information indicating whether or not communication is possible on carrier frequencies belonging to the second carrier frequency group, the dependent station receiving the first control signal, operating in synchronization with a first control station, receiving the second control signal, operating in synchronization with the second control station, and operating in synchronization with the second carrier frequency group with the first control signal; and the second control signal reports that communication is not possible at carrier frequencies belonging to the second carrier frequency group, transmitting to the first control station a third control signal including information indicating that communication on carrier frequencies belonging to the second carrier frequency group is not possible to the first control station; The station is configured to, upon receiving the third control signal from the dependent station, transmit the first control signal using a carrier frequency belonging to the first carrier frequency group.

According to this, the carrier frequencies that can be used by the first control station and the second control station are notified, and if the first control station can use the carrier frequency that cannot be used by the second control station, the dependent station notifies the first control station that there is a carrier frequency that cannot be used, and the first control station does not transmit control signals using the carrier frequency notified that it cannot be used. Even if the carrier frequencies that can be used by one control station and the second control station are different, radio communication within the radio communication system can be performed without causing any trouble.

According to a second aspect of the invention, which has been made to solve the above problems, when the dependent station is registered with the first control station and the second control station, it transmits the identification information of the first control station to the second control station. When the identification information is notified from the dependent station, the second control station receives the first control signal and operates in synchronization with the first control station. to configure.

According to this, the dependent station notifies the identification information of the first control station to the second control station, and the second control station identifies the first control station based on the identification information notified from the dependent station. synchronization can be established, there is no need to perform association between the first control station and the second control station by user operation, and convenience can be improved.

A radio communication system according to a third aspect of the present invention, which has been made to solve the above problems, is composed of a first control station, a second control station, and a dependent station, and each device is connected to a first carrier frequency group or A radio communication system that performs radio communication by time division multiplex communication using carrier frequencies belonging to a second carrier frequency group, wherein the first carrier frequency group is composed of at least one carrier frequency, and the second The carrier frequency group is composed of at least one carrier frequency excluding the carrier frequencies belonging to the first carrier frequency group, and the first control station controls the carrier frequencies belonging to the second carrier frequency group A first control signal including information indicating whether or not communication is possible is broadcast, and the second control station receives the first control signal and operates in synchronization with the first control station. , when the first control signal indicates that communication is possible on carrier frequencies belonging to the second carrier frequency group, the first carrier frequency group and the second carrier frequency group When communication with the first control station is performed using a carrier frequency belonging to the second carrier frequency group, and the first control signal notifies that communication is not possible at the carrier frequency belonging to the second carrier frequency group , the dependent station is registered which communicates with the first control station using carrier frequencies belonging to the first carrier frequency group and is capable of communicating on carrier frequencies belonging to the second carrier frequency group. If so, transmit a second control signal using any one of the carrier frequencies belonging to the first carrier frequency group and the second carrier frequency group, and belong to the second carrier frequency group The second control signal is transmitted using one of the carrier frequencies belonging to the first carrier frequency group when the dependent station that cannot communicate on the carrier frequency is registered.

According to this, the second control station communicates with the first control station using the carrier frequency notified by the first control station that can be used by the first control station, and receives the notification from the dependent station. Since the second control signal is transmitted using the carrier frequency that the dependent station can use, even if the carrier frequencies that can be used by the first control station, the second control station, and the dependent station are different, Wireless communication within the wireless communication system becomes possible without causing any trouble.

The second control station of the fourth invention, which has been made to solve the above problems, uses any carrier frequency belonging to the first carrier frequency group when the registration mode of the dependent station is activated. and transmits the second control signal.

According to this, when registering the dependent station, the second control station transmits the second control signal with a carrier frequency belonging to the first carrier frequency group. When a station is registered by wireless communication, regardless of whether or not the dependent station can communicate on carrier frequencies belonging to the second carrier frequency group, the registration of the dependent station is possible with the same control, and the frequency can be changed by user operation. There is no longer a need to perform operations such as restrictions, and convenience can be improved.

Next, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, a case where a wireless communication system is configured with a control station (cordless telephone main unit) of a cordless telephone device as a first control station and a control station of a door phone device as a second control station will be described as an example. I do.

First, the configuration of the wireless communication system according to the first embodiment will be described.

FIG. 1 is a diagram showing the configuration of a wireless communication system according to the first embodiment. As shown in FIG. 1, the radio communication system in the first embodiment includes a cordless telephone device control station (hereinafter referred to as "cordless telephone base station") 100 operating as a first control station, and a cordless telephone device control station 100. A wireless slave unit 200 that operates as a dependent station and operates as a dependent station of a doorphone device to be described later, and a control station (hereinafter referred to as "doorphone master unit") 300 of the doorphone device that operates as a second control station. Configured. The doorphone device includes a door terminal unit 310 . Although only one wireless slave device 200 operating as a dependent station is shown in FIG. 1, the number of wireless slave devices 200 may be plural in this embodiment.

Radio communication in the radio communication system in the first embodiment divides the time axis into basic units called frames, divides the frame into a plurality of slots, and uses time division multiplex communication in which communication is performed in each slot. done. In the wireless communication system according to the first embodiment, cordless telephone master unit 100 transmits a control signal (hereinafter referred to as a first control signal) in one slot in a frame, and intercom master unit 300 transmits the first control signal. By receiving the control signal, frames and slots for time-division multiplex communication with the cordless telephone master station 100 are synchronized, communication with the cordless telephone master station 100 is performed, and the control signal ( hereinafter referred to as a second control signal). Further, radio slave unit 200 synchronizes frames and slots for time-division multiplex communication with cordless telephone master unit 100 by receiving the first control signal, and communicates with cordless telephone master unit 100. , the second control signal is received to synchronize frames and slots for time-division multiplex communication with doorphone master unit 300, and communication with doorphone master unit 300 is performed. receives the first control signal and the second control signal, and performs an operation according to the event notified by the control signal.

This completes the description of the configuration of the wireless communication system according to the first embodiment.

Next, an operation example of the wireless communication system according to the first embodiment shown in FIG. 1 will be described.

In the wireless communication system according to the first embodiment shown in FIG. 1, when an external line call is received from the telephone line, the cordless telephone base unit 100 notifies that the external line is receiving a control signal. When it is notified by a signal that the outside line is receiving an incoming call, the user is notified of the outside line incoming by ringing a ringer or the like. Then, when the user performs an operation to respond to the incoming call on the outside line with the wireless slave device 200, the wireless slave device 200 activates wireless communication with the cordless telephone base unit 100, and a voice call connection is established with the caller.

In the wireless communication system according to the first embodiment shown in FIG. 1, when a visitor performs a call operation with the entrance handset unit 310, the doorphone base unit 300 transmits the video signal captured by the entrance handset unit 310 to the indoor Display on the monitor and sound the notification sound. Further, doorphone master unit 300 notifies that a visitor is being notified by a control signal, and starts transmission of a radio signal carrying a video signal captured by entrance slave unit 310 . When the radio slave unit 200 is notified by the control signal that a visitor is being notified, the radio slave unit 200 starts receiving the video signal, sounds an alarm sound for notifying the visitor notification, displays the received image, and informs the user. Notifies that a visitor has performed a calling operation. When the user performs a response operation on the wireless slave device 200, the wireless slave device 200 activates wireless communication with the doorphone master device 300, and a voice call connection with the visitor is established.

Further, when doorphone master unit 300 operates as a subordinate station of cordless telephone master unit 100, that is, doorphone master unit 300 is registered in cordless telephone master unit 100 as a slave unit of cordless telephone master unit 100. When the visitor performs a call operation on doorphone master unit 300, doorphone master unit 300 activates wireless communication with cordless telephone master unit 100 and notifies that the call operation has been performed. On the other hand, when the cordless telephone master unit 100 is notified that the call operation has been performed by the doorphone master unit 300, it emits a notification sound for notifying the visitor notification, thereby notifying the user that the visitor has performed the call operation. Notice. Then, when the user performs an answering operation on cordless telephone master unit 100, cordless telephone master unit 100 notifies intercom master unit 300 that the answering operation has been performed, and a voice call connection with the visitor is established. will be

This completes the description of the outline of the operation of the wireless communication system according to the first embodiment.

Next, a configuration example of the cordless telephone base station 100 of the wireless communication system according to the first embodiment will be described with reference to FIG.

FIG. 2 is a block diagram showing a configuration example of the cordless telephone base station 100 according to the first embodiment.

In cordless telephone master unit 100, radio section 101 modulates a transmission signal sequence and transmits it as a radio signal, demodulates the received radio signal, and outputs a received signal sequence. The frame processing unit 102 generates a transmission signal sequence composed of a bit synchronization signal, a sync word, transmission data, and an error detection code in accordance with the frame and slot timings of time division multiplex communication, and outputs it to the radio unit 101. Based on the sync word from the received signal string input from 101, the received data and error detection code are extracted and output. Handset information storage unit 103 stores handset identification information and carrier frequency support capability belonging to the second carrier frequency group, that is, handset The information storage unit 103 stores information as to whether communication using the carrier frequency of carrier number 9 is supported (hereinafter referred to as carrier 9 support information). As carrier 9 correspondence information, when communication using the carrier frequency of carrier number 9 is supported, "true" is stored in the handset information storage unit 103, and communication using the carrier frequency of carrier number 9 is supported. If not supported, “false” is stored in the slave device information storage unit 103 . The display unit 105 displays that the slave unit registration mode has been activated, displays the telephone number of the caller when receiving an incoming call from the line, displays a visitor notification on the side of the intercom device, and the like. A notifying unit 106 notifies, by sound, that the slave unit registration mode has been activated, an incoming call from the line, a visitor notification from the intercom device side, and the like. An operation unit 108 performs input such as activation operation of the slave unit registration mode, response to a visitor notification to the door phone side, and the like. An audio unit 109 includes a microphone, a speaker, an amplifier circuit, and the like, and inputs and outputs audio signals. The line control unit 110 communicates with a wired telephone line network. The control unit 120 controls the entire cordless telephone base unit 100 . The control unit 120 includes a memory (ROM) storing control software, a memory (RAM) for temporary storage for control, an arithmetic processing unit (CPU), and the like.

This completes the description of the configuration example of the cordless telephone base station 100 of the wireless communication system according to the first embodiment.

Next, a configuration example of the wireless slave device 200 according to the first embodiment will be described with reference to FIG.

FIG. 3 is a block diagram showing a configuration example of the wireless slave device 200 according to the first embodiment.

In FIG. 3, a radio section 201 modulates a transmission signal string and transmits it as a radio signal, demodulates a received radio signal, and outputs a reception signal string. The frame processing unit 202 generates a transmission signal sequence composed of a bit synchronization signal, a sync word, transmission data, and an error detection code in accordance with the frame and slot timing of time division multiplex communication, and outputs it to the radio unit 201. Synchronization of time-division multiplex communication with cordless telephone master unit 100 and intercom master unit 300 is maintained based on the sync word from the received signal train input from 201, and the received data and error detection code are extracted and output. . Base unit information storage unit 203 stores base unit identification information and the ability to handle carrier frequencies belonging to the second carrier frequency group, that is, a carrier number, for each registered control station (cordless telephone base unit 100, door phone base unit 300). 9 carrier frequency (hereinafter referred to as carrier 9 compatibility information). The parent device identification information stored in the parent device information storage unit 203 is an invalid value of the parent device identification information, ALL0, in the initial state (unregistered). unique identification information (master identification information) is written. In addition, when the registered control station supports communication using the carrier frequency of carrier number 9, "true" is stored as carrier 9 correspondence information in parent device information storage unit 203, and "true" is stored in the registered control station. does not support communication using the carrier frequency of carrier number 9, "false" is stored. The display unit 205 displays that the registration mode has been activated, displays the telephone number of the caller when receiving an incoming call from the line, the telephone number of the callee input by the operation unit 208, which will be described later, and when the doorphone device side notifies a visitor. 310 is displayed. The notification unit 206 notifies, by sound, that the slave unit registration mode has been activated, an incoming call from the line, and a visitor notification from the intercom device side. An operation unit 208 performs an operation for activating a slave unit registration mode, an input of a telephone number when making a call, an operation for responding to an incoming call, a response to a visitor notification to the door phone, and other inputs. An audio unit 209 includes a microphone, a speaker, an amplifier circuit, and the like, and inputs and outputs an audio signal. The control unit 220 controls the entire wireless slave device 200 . The control unit 220 includes a memory (ROM) storing control software, a memory (RAM) for temporary storage for control, an arithmetic processing unit (CPU), and the like.

In the wireless communication system of the present invention, it is possible to use a plurality of wireless slave units 200, and the block configuration of each wireless slave unit 200 is the same as described above. This completes the description of the configuration example of the wireless slave device 200 according to the first embodiment.

Next, a configuration example of the intercom master unit 300 of the wireless communication system according to the first embodiment will be described with reference to FIG.

FIG. 4 is a block diagram showing a configuration example of the intercom master unit 300 according to the first embodiment.

In FIG. 4, a radio section 301 modulates a transmission signal string and transmits it as a radio signal, demodulates a received radio signal, and outputs a reception signal string. The frame processing unit 302 generates a transmission signal sequence composed of a bit synchronization signal, a sync word, transmission data, and an error detection code in accordance with the frame and slot timing of time division multiplex communication, and outputs it to the radio unit 301. Based on the sync word from the received signal string input from 301, the received data and the error detection code are extracted and output. The child device information storage unit 303 stores the child device identification information and the support capability of the carrier frequencies belonging to the second carrier frequency group, that is, the carrier frequency of carrier number 9, for each registered dependent station (wireless slave device 200). Information on whether or not the communication used is compatible (hereinafter referred to as carrier 9 compatibility information) is stored. Base unit information storage unit 304 stores the base unit identification information of the registered control station (cordless telephone base unit 100) or the control station (cordless telephone base unit 100) notified from wireless slave unit 200, and base unit identification information. Information identifying whether the registered control station or the wireless slave device 200 is notified, the support capability of carrier frequencies belonging to the second carrier frequency group, that is, support for communication using the carrier frequency of carrier number 9 It stores information as to whether or not As carrier number 9 correspondence information, when communication using the carrier frequency of carrier number 9 is supported, "true" is stored in child device information storage unit 303 and parent device information storage unit 304, and carrier number 9 If the communication using the carrier frequency is not supported, “false” is stored in the child device information storage unit 303 and the parent device information storage unit 304 . In the initial state (unregistered), the parent device identification information stored in the parent device information storage unit 304 is an invalid value of the parent device identification information, ALL0. When the machine registration is completed, the unique identification information (master machine identification information) of the control station is written. The display unit 305 displays that the slave unit registration mode has been activated, displays a visitor notification, and the like. The notification unit 306 notifies, by sound, that the slave unit registration mode for registering the wireless slave unit 200 has been activated, the slave unit registration mode for registering with the cordless telephone master unit 100 has been activated, a visitor notification, and the like. An operation unit 308 performs an operation for activating a slave unit registration mode for registering the wireless slave unit 200, an operation for activating a slave unit registration mode for registering with the cordless telephone base unit 100, and inputs such as a response to a visitor notification. An audio unit 309 includes a microphone, a speaker, an amplifier circuit, and the like, and inputs and outputs audio signals. The entrance slave unit 310 includes a button for activating a visitor notification, an audio circuit for communication, a camera for capturing an image of the visitor, a control circuit for the camera, and the like. Control unit 320 performs overall control of intercom master unit 300 . The control unit 320 includes a memory (ROM) storing control software, a memory (RAM) for temporary storage for control, an arithmetic processing unit (CPU), and the like.

This concludes the description of the configuration example of the intercom master unit 300 of the wireless communication system according to the first embodiment.

Next, the operations of the cordless telephone master unit 100, the wireless slave unit 200, and the intercom 300 of the wireless communication system according to the first embodiment to control the use of carrier frequencies according to the capabilities of the respective connection destinations will be described. In the following description, the carrier frequencies when the cordless telephone master unit 100, the wireless slave unit 200, and the intercom master unit 300 perform DECT wireless communication using the carrier frequencies and carrier numbers shown in Table 1 above. An example of the operation for controlling is explained. Further, the four carrier frequencies of carrier numbers 0, 1, 2, 3, and 4 shown in Table 1 are the carriers of the first carrier frequency group of the present invention, and the carrier frequency of carrier number 9 is the second carrier frequency of the present invention. The following description will be given by taking as an example the operation in the case of group carriers.

First, the operation of the cordless telephone base station 100 of the wireless communication system according to the first embodiment will be described with reference to FIG.

FIG. 5 is a flow chart showing an operation example of the cordless telephone base station 100 of the wireless communication system according to the first embodiment.

When cordless telephone base station 100 is activated, flow proceeds to step 301 .

At step 301, the control unit 120 of the cordless telephone base unit 100 reads all registered handset information at the start of operation. That is, carrier 9 compatible information indicating whether or not each registered dependent station (wireless slave unit 200, intercom master unit 300) is compatible with carrier number 9 communication is read from slave unit information storage unit 103. conduct. Flow then proceeds to step 302 .

At step 302, control unit 120 checks whether a dependent station that does not support communication using the carrier frequencies of the second carrier frequency group (the carrier frequency of carrier number 9) is registered. That is, the value of the carrier 9 correspondence information of each registered dependent station read from the handset information storage unit 103 is checked. If even one of the carrier 9 correspondence information of the registered dependent station is "false" indicating that communication using the carrier frequency of carrier number 9 is not supported (step 302: Yes), the process proceeds to step 304, and registration is performed. If “false” is not included in the carrier 9 correspondence information of the dependent station (step 302 : No), the flow proceeds to step 303 .

At step 303, the control unit 120 sets the carrier numbers of the carrier frequencies that can be used as the carrier frequencies for the first control signal to the first carrier frequency group and all the carrier frequencies included in the first carrier frequency group. , that is, 0, 1, 2, 3, 4, and 9. Flow then proceeds to step 305 .

At step 304, control section 120 sets the carrier numbers of the carrier frequencies that can be used as the carrier frequencies for the first control signal to numbers corresponding to all carrier frequencies included in the first carrier frequency group, that is, 0 , 1, 2, 3, 4. Flow then proceeds to step 305 .

At step 305, the cordless telephone base unit 100 sends a first control signal for informing base unit identification information, carrier numbers for communication (0, 1, 2, 3, 4, 9), operation mode (normal mode), etc. is transmitted, the normal mode is activated to wait for communication such as position registration and call connection from the subordinate station (wireless handset 200, intercom master 300). The control unit 120 transmits a first control signal in one slot in a frame (hereinafter, a slot for transmitting the first control signal is called a control slot), and a slot other than the control slot (hereinafter, a standby slot ) controls the radio section 101 and the frame processing section 102 so as to perform reception. At this time, the first control signal is transmitted at a carrier frequency corresponding to one carrier number selected from among the carrier numbers set in step 303 or step 304 . In the standby slot, the signal from the wireless slave device 200 is received while switching the reception frequency for each frame so as to receive signals of carrier frequencies of carrier numbers 0, 1, 2, 3, 4, and 9 for each frame. While holding it, it detects the level of interfering waves. Also, in step 305, a process of moving the first control signal to avoid interference jamming of the first control signal is performed. The control unit 120 periodically stops the transmission of the first control signal, and controls the radio unit 101 and the frame processing so as to receive the carrier frequency used for the transmission of the first control signal in the control slot. It controls the section 102 and detects the level of the interfering wave in the control slot. Then, the control unit 120 compares the level of the interfering wave in the combination of each carrier frequency and each slot detected in the standby slot with the level of the interfering wave in the control slot, and the level of the interfering wave is the lowest in step 303 or step Radio section 101 performs frame processing so as to select a combination of each carrier frequency and slot corresponding to the carrier number set in 304 and restart transmission of the first control signal of the selected carrier frequency in the selected slot. control unit 102; Flow then proceeds to step 306 .

At step 306, it is determined whether or not the slave unit registration mode has been activated. The control unit 120 determines whether an operation to activate the slave unit registration mode has been performed on the operation unit 108, and if an operation to activate the slave unit registration mode has been performed (step 306: Yes), the process proceeds to step 310, If the operation to activate the slave device registration mode has not been performed (step 306 : No), the flow proceeds to step 320 .

At step 310, control section 120 sets the carrier numbers of carrier frequencies that can be used as carrier frequencies for the first control signal to numbers corresponding to all carrier frequencies included in the first carrier frequency group, that is, 0 , 1, 2, 3, 4. Flow then proceeds to step 311 .

At step 311, the cordless telephone base unit 100 sends the base unit identification information, the carrier number for communication (0, 1, 2, 3, 4, 9), the operation mode (handset registration mode), and the like. While transmitting the control signal, it activates the slave unit registration mode for waiting for the slave unit registration request from the dependent station. The control unit 120 transmits the first control signal at the carrier frequency selected from among the carrier frequencies corresponding to the carrier number set in step 310, and transmits the first control signal at the waiting slot to the subordinate station (wireless handset 200, intercom master). The wireless unit 101 and the frame processing unit 102 are controlled so as to receive the slave unit registration request from the unit 300). That is, when the control unit 120 transmits the first control signal at a carrier frequency belonging to the second carrier frequency group (carrier frequency corresponding to carrier number 9) during operation in the normal mode in step 305, After the transition to step 311, each carrier frequency detected in the waiting slot is compared with the level of interfering waves in the combination of each slot, and each carrier frequency corresponding to the carrier number set in step 310 with the lowest level of interfering waves. (carrier frequencies belonging to the first carrier frequency group) and slots are selected, and the radio unit 101 and the frame processing unit transmit the transmission of the first control signal of the selected carrier frequency in the selected slots. 102. Further, when the process proceeds to step 311, the control unit 120 starts the slave unit registration limit timer, displays that the slave unit is being registered on the display unit 105, and notifies that the slave unit is being registered by the notification unit 106. Control to notify. Flow then proceeds to step 312 . Note that during operation in the normal mode of step 305, the first control is performed using any of the carrier frequencies belonging to the first carrier frequency group (carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, and 4). When the signal is being transmitted, the transmission slot and carrier frequency of the first control signal are not changed, and only the content to be notified in the operation mode is changed to transmit the first control signal.

At step 312, it is determined whether or not handset registration has been completed. The control unit 120 determines whether the slave unit registration sequence with the subordinate station (wireless slave unit 200, doorphone master unit 300) has been correctly completed. If the slave unit registration has been completed (step 312: Yes) Proceeding to step 314 , if child device registration has not been completed (step 312 : No), the flow proceeds to step 313 .

At step 313, it is determined whether or not the limit timer for handset registration has expired. The control unit 120 determines whether or not the slave unit registration limit timer has expired, and if the slave unit registration limit timer has expired (step 313: Yes), the process proceeds to step 301, where the slave unit registration limit timer expires. If not (step 313 : No), the flow proceeds to step 312 . When the limit timer for slave unit registration expires (step 313: Yes) and the flow advances to step 301, the already-registered The handset information is read (step 301), the capability of the dependent station is determined (step 302), and the carrier number that can be used in the control signal is set according to the capability of the dependent station (step 303 or step 304). , go to step 305 to return to normal mode operation.

In step 314, when handset registration is completed, cordless telephone base unit 100 stores information of dependent stations for which handset registration has been completed. Control unit 120 assigns a slave unit number to wireless slave unit 200 in a slave unit registration sequence, and assigns a slave unit registration sequence to a slave unit identification information management area corresponding to the slave unit number assigned in slave unit information storage unit 103 . writes the slave unit identification information notified from the wireless slave unit 200, and the communication using the carrier frequency of the carrier number 9 is performed in the management area of the carrier 9 corresponding information corresponding to the slave unit number assigned in the slave unit information storage unit 103. Write "false" indicating unsupported. Flow then proceeds to step 301 . Then, in the same manner as described in steps 301, 302, 304 and 305 above, handset information of all registered dependent stations including registration information of newly registered dependent stations is read (step 301). , the capability of the dependent station is determined (step 302), and since the carrier 9 corresponding information of the newly registered dependent station is "false", the process proceeds to step 304 to determine the carrier frequency available for the first control signal. is restricted to only the carrier frequencies belonging to the first carrier frequency group, the process proceeds to step 305 and returns to normal mode operation.

At step 320, cordless telephone master unit 100 determines whether or not handset information has been received. The control unit 120 determines whether or not the dependent station (wireless slave device 200, doorphone master device 100) can handle a carrier frequency belonging to the second carrier frequency (whether or not the carrier frequency of carrier number 9 can be used for communication). ) has been received, and if the child device information has been received (step 320: Yes), the process proceeds to step 321, and if the child device information has not been received (step 320: No), flow proceeds to step 305;

At step 321, the cordless telephone base unit 100 updates the handset information. Based on the slave unit identification code and the slave unit information supplied from the subordinate station (wireless slave unit 200, intercom master unit 100), the control unit 120 controls the slave unit notified from the wireless slave unit 200 in the slave unit information storage unit 103. The handset information notified from the subordinate station (wireless handset 200, intercom master 100) is written in the management area of carrier 9 corresponding information corresponding to the handset identification code. That is, when the control unit 120 is notified by the dependent station (wireless slave device 200, intercom master unit 100) that it can handle a carrier frequency belonging to the second carrier frequency, the control unit 120 selects carrier 9 of the dependent station. When "true" is written in the corresponding information management area and it is notified that the carrier frequency belonging to the second carrier frequency cannot be supported, "false" is written in the management area of the carrier 9 corresponding information of the dependent station. Write. Note that whether or not a carrier frequency belonging to this second carrier frequency can be supported is determined, for example, in the DECT communication protocol, an information element (IWU- (TO-IWU) is used to notify the cordless telephone master unit 100 from the wireless slave unit 200. FIG. Then, the flow proceeds to step 301 to update the handset information. Then, the newly updated child device information is read (step 301) and the ability of the child device is determined (step 302) in the same manner as in the description of steps 301, 302, 303, 304, and 305 described above. , a carrier number that can be used in the control signal is set according to the capability of the handset (step 303 or step 304), and the process proceeds to step 305 to return to normal mode operation.

In addition, the notification of the parent identification information and the carrier number for communication is notified by a signal called Dummy bearer in the DECT communication protocol, and the 40-bit parent identification information is notified by Identities information (NT), The carrier number for communication is notified by a signal called RF-carriers in static system info of System information and multiframe marker (QT).

This completes the description of the operation of the cordless telephone base station 100 of the wireless communication system according to the first embodiment.

Next, the operation of the wireless slave device 200 of the wireless communication system according to the first embodiment will be described using FIG.

FIG. 6 is a flowchart showing an operation example of the wireless slave device 200 according to the first embodiment.

When wireless slave device 200 is activated, the flow proceeds to step 601 .

At step 601, control section 220 of wireless handset 200 reads information on handset registration between cordless telephone base set 100 and doorphone base set 300 from base set information storage section 203 at the start of operation. That is, from the base unit information storage unit 203, the base unit identification information of the registered cordless telephone base unit 100 and the intercom base unit 300, and the carrier 9 compatible information indicating whether or not the carrier number 9 communication is supported are read. . Flow then proceeds to step 602 .

At step 602 , control unit 220 determines information related to handset registration with intercom master set 300 . If the doorphone master unit is registered, that is, if the master unit identification information of the doorphone master unit is stored in the master unit information storage unit 203 (step 602: Yes), the process proceeds to step 603, and the doorphone master unit is registered. If not, that is, if the base unit identification information of the intercom base unit stored in base unit information storage unit 203 is an invalid value (ALL0) (step 602: No), the flow proceeds to step 611. .

At step 603 , control unit 220 establishes synchronization with doorphone master device 300 and starts reception of the second control signal for doorphone master device 300 . First, the control unit 220 controls the radio unit 201 and the frame processing unit 202 so as to perform continuous reception while sequentially changing the reception frequency. At this time, control section 220 selects the first carrier frequency group of carrier numbers 0, 1, 2, 3, 4, and 9 and the carriers belonging to the second carrier frequency group as the reception frequencies for searching for the parent device. The frequencies are sequentially selected, the radio signal of the selected carrier frequency is received, the master unit identification information is extracted from the received signal based on the sync word, and the master unit of the intercom master unit 300 stored in the master unit information storage unit 203. Controls radio section 201 and frame processing section 202 so as to receive frames and slots in synchronization with a control signal (second control signal) transmitting identification information, and frames with registered intercom base unit 300. , to establish slot synchronization. Flow then proceeds to step 604 .

At step 604 , control unit 220 notifies intercom master unit 300 of a carrier frequency (carrier number) that can be used by wireless slave unit 200 . That is, control unit 220 selects a carrier frequency that can be used for communication with doorphone master unit 300 based on carrier 9 correspondence information of doorphone master unit 300 stored in master unit information storage unit 203, and selects a carrier frequency that can be used for communication with doorphone master unit 300. radio unit 201 and frame processing unit 202 to activate wireless communication with the main unit 300, and when wireless communication with the intercom master unit 300 is activated, carrier numbers 0, 1, 2, 3, 4, and 9 are selected. The intercom master unit 300 is notified that the carrier frequencies (carrier numbers) belonging to the first carrier frequency group and the second carrier frequency group are available. Flow then proceeds to step 605 .

At step 605 , control unit 220 notifies the doorphone master unit of the master unit identification information of registered cordless telephone master unit 100 . Control unit 220 notifies intercom master unit 300 of the master unit identification information of cordless telephone master unit 100 stored in master unit information storage unit 203 using the wireless communication path activated in step 604, and stops wireless communication. The radio section 201 and the frame processing section 202 are controlled so as to do so. At this time, if the wireless slave device 200 is not registered with the cordless telephone master device 100, ALL0 is notified as the master device identification information, and if it is registered with the cordless telephone master device 100, the registered cordless telephone master device is registered. A unique identification code (master identification information) is notified. Flow then proceeds to step 611 .

At step 611 , control unit 220 determines information regarding handset registration with cordless telephone master set 100 . If it is registered as a cordless phone, that is, if the base unit identification information of the cordless phone is stored in the base unit information storage unit 203 (step 611: Yes), the process proceeds to step 612, and the doorphone base unit is registered. If not, that is, if the base unit identification information of the intercom base unit stored in base unit information storage unit 303 is an invalid value (ALL0) (step 611 : No), the flow proceeds to step 630 .

At step 612 , control unit 220 establishes synchronization with cordless telephone base station 100 and begins receiving the first control signal for cordless telephone base station 100 . First, the control unit 220 controls the radio unit 201 and the frame processing unit 202 so as to perform continuous reception while sequentially changing the reception frequency. At this time, control section 220 selects the first carrier frequency group of carrier numbers 0, 1, 2, 3, 4, and 9 and the carriers belonging to the second carrier frequency group as the reception frequencies for searching for the parent device. The frequencies are sequentially selected, the radio signal of the selected carrier frequency is received, the master unit identification information is extracted from the received signal based on the sync word, and the master unit of the cordless telephone master unit 100 stored in the master unit information storage unit 203 is obtained. The radio unit 201 and the frame processing unit 202 are controlled so as to receive frames and slots in synchronization with the control signal (first control signal) transmitting the device identification information, and the registered cordless telephone base unit 100 and frame and slot synchronization. When the process proceeds to step 612 in a state in which synchronization with doorphone master device 300 is established, control unit 220 maintains the synchronization with doorphone master device 300 established in step 601, radio section 201, frame It controls the processing unit 202 . Flow then proceeds to step 613 .

At step 613, control unit 220 determines whether intercom master unit 300 supports communication using a carrier frequency belonging to the second carrier frequency group (carrier frequency corresponding to carrier number 9). . When doorphone master unit 300 supports communication using a carrier frequency belonging to the second carrier frequency group (carrier frequency corresponding to carrier number 9), that is, the carrier of doorphone master unit in master unit information storage unit 203 If the 9 correspondence information is "true" (step 613: Yes), the process proceeds to step 614, and intercom master unit 300 uses the carrier frequency belonging to the second carrier frequency group (the carrier frequency corresponding to carrier number 9). In other words, if the carrier 9 compatible information of the intercom master in the master device information storage unit 203 is “false” (step 613 : No), the flow proceeds to step 615 . If not registered in doorphone master unit 300 (step 613 : Yes), the flow proceeds to step 614 .

In step 614, control unit 220 sends to cordless telephone base unit 100 carrier frequencies belonging to the first carrier frequency group and the second carrier frequency group (corresponding to carrier numbers 0, 1, 2, 3, 4, and 9). carrier frequency) is available. That is, control unit 220 selects a carrier frequency that can be used for communication with cordless telephone base unit 100 based on carrier 9 correspondence information of cordless telephone base unit 100 stored in base unit information storage unit 203, Radio section 201 and frame processing section 202 are controlled to activate wireless communication with cordless telephone base station 100. When wireless communication with cordless telephone base station 100 is activated, carrier numbers 0, 1, 2, 3, and 4 are selected. , 9 and the carrier frequencies (carrier numbers) belonging to the second carrier frequency group can be used, and to stop the radio communication. It controls the unit 201 and the frame processing unit 202 . Flow then proceeds to step 630 .

At step 615, control unit 220 notifies cordless telephone base unit 100 that carrier frequencies belonging to the first carrier frequency group (carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, and 4) can be used. Notice. That is, control unit 220 selects a carrier frequency that can be used for communication with cordless telephone base unit 100 based on carrier 9 correspondence information of cordless telephone base unit 100 stored in base unit information storage unit 203, Radio section 201 and frame processing section 202 are controlled to activate wireless communication with cordless telephone base station 100. When wireless communication with cordless telephone base station 100 is activated, carrier numbers 0, 1, 2, 3, and 4 are selected. is available to the cordless telephone master unit 100, and radio section 201 and frame processing section 202 are controlled to stop radio communication. Flow then proceeds to step 630 .

At step 630, the controller 220 controls the standby state. That is, in the registration state, control unit 220 controls the radio unit to continue receiving the first control signal transmitted from cordless telephone master unit 100 and the second control signal transmitted from doorphone master unit 300. 201 and frame processing unit 202 .

Further, in step 630, when the first control signal transmitted from the cordless telephone master unit 100 notifies that an outside line is receiving an incoming call, the control unit 220 notifies the user of the incoming outside line by ringing a ringer or the like. The notification unit 206 is controlled as follows. Then, when a response operation is performed on the operation unit 208 , the control unit 220 communicates with the cordless telephone master unit 100 based on the carrier 9 correspondence information of the cordless telephone master unit 100 stored in the master unit information storage unit 203 . selecting a carrier frequency that can be used for communication, controlling the radio unit 201 and the frame processing unit 202 to activate wireless communication with the cordless telephone master unit 100, activating wireless communication with the cordless telephone master unit 100, It controls the audio unit 209 to make a voice call. Then, when the end operation is performed on the operation unit 208, the wireless communication is stopped, and the control unit 220 receives the first control signal transmitted from the cordless telephone master unit 100 and the doorphone master unit 300 in the registration state. It controls the radio section 201 and the frame processing section 202 so as to continue receiving the transmitted second control signal.

In step 630, when doorphone master unit 300 notifies that a visitor is being notified by means of the second control signal, control unit 220 starts receiving a video signal, emits a notification sound for notifying the visitor notification, and receives the notification. The display unit 205 and the notification unit 206 are controlled so as to display the displayed image and notify the user that the visitor has performed the calling operation. Then, when a response operation is performed on operation unit 208 , control unit 220 initiates communication with doorphone master unit 300 based on carrier 9 correspondence information of doorphone master unit 300 stored in master unit information storage unit 203 . A usable carrier frequency is selected, the wireless unit 201 and the frame processing unit 202 are controlled to start wireless communication with the doorphone master unit 300, wireless communication with the doorphone master unit 300 is started, and voice communication is performed. The audio unit 209 is controlled as follows. Then, when the end operation is performed on the operation unit 208, the wireless communication is stopped, and the control unit 220 receives the first control signal transmitted from the cordless telephone master unit 100 and the doorphone master unit 300 in the registration state. It controls the radio section 201 and the frame processing section 202 so as to continue receiving the transmitted second control signal.

Then, the flow advances from step 630 to step 631 at regular intervals.

At step 631, the control unit 220 determines whether or not an operation for registering a child device has been performed. If an operation to activate the registration operation is performed on the operation unit 208 (step 631, Yes), the flow proceeds to step 632, and if an operation to activate the registration operation is not performed (step 631: No), the flow proceeds to step 630. move on.

At step 632, a search is made for a control station (cordless telephone base unit 100 or intercom base unit 300) operating in the handset registration mode. Establish synchronization with the control station. The control unit 220 controls the radio unit 201 and the frame processing unit 202 so as to perform continuous reception while sequentially changing the reception frequency. At this time, control section 220 selects the first carrier frequency group of carrier numbers 0, 1, 2, 3, 4, and 9 and the carriers belonging to the second carrier frequency group as the reception frequencies for searching for the parent device. The frequencies are selected sequentially, the radio signal of the selected carrier frequency is received, the master unit identification information and operation mode are extracted from the received signal based on the sync word, and the control station (cordless telephone master unit) operating in the slave unit registration mode 100 or intercom base unit 300), and controls the radio unit 201 and frame processing unit 202 so as to receive frames and slots in synchronization with the control station. Flow then proceeds to step 633 . If, in step 632, synchronization with the control station in the registration mode cannot be established within the predetermined time, the process returns to step 601 (not shown).

In step 633, control unit 220 receives a control signal (first control signal or second control signal) transmitted from the synchronized control station (cordless telephone master unit 100 or intercom master unit 300). It continues to receive information on carrier frequencies that can be used for communication with the control station. Then, the control unit 220 selects a carrier frequency for communication based on the received information on carrier frequencies that can be used for communication with the control station, and selects a carrier frequency for communication with the synchronized control station (cordless telephone base unit 100 or intercom base unit). 300), activates the sequence of slave unit registration, notifies the slave unit identification code, performs mutual authentication, etc., performs slave unit registration, and stops wireless communication. It controls the radio section 201 and the frame processing section 202 . Then, control unit 220 stores the received base unit identification information and the control information in the management area for cordless telephone base unit 100 or intercom base unit 300 corresponding to the control station whose registration in base unit information storage unit 203 is completed. Writes information on carrier frequencies that can be used for communication with the station (carrier 9 correspondence information). Then, proceed to step 601 .

Note that the wireless communication performed between the intercom base unit 300 and the wireless slave unit 200 in steps 604 and 605 is, for example, wireless communication for location registration in the DECT communication protocol, and can be used. Information elements (IWU -TO-IWU).

Similarly, the wireless communication performed between the cordless telephone base unit 100 and the wireless slave unit 200 in steps 614 and 615 is, for example, wireless communication for location registration in the DECT communication protocol, Notification of available carrier numbers is notified using an information element (IWU-TO-IWU) that conveys a message between IWUs in a location registration request message (LOCATE-REQEST).

Further, in step 633, the wireless communication between the control station (cordless telephone master unit 100 or door phone master unit 300) and the wireless slave unit 200, for example, according to the communication protocol of the DECT method, is called slave unit registration (obtaining access rights). ) in which a handset registration request message (ACCESS-RIGHT-REQEST) and a handset registration response message (ACCESS-RIGHT-ACCEPT) are transmitted and received.

In addition, the notification of the parent identification information and the carrier number for communication is notified by a signal called Dummy bearer in the DECT communication protocol, and the 40-bit parent identification information is notified by Identities information (NT), The carrier number for communication is notified by a signal called RF-carriers in static system info of System information and multiframe marker (QT).

This completes the description of the operation example of the wireless slave device according to the first embodiment.

Next, the operation of the intercom master unit of the wireless communication system according to the first embodiment will be described with reference to FIG.

FIG. 7 is a flowchart showing an operation example of the intercom master unit 300 of the wireless communication system according to the first embodiment.

When doorphone base unit 300 is activated, the flow proceeds to step 701 .

At step 701, control unit 320 of intercom master unit 300 reads information relating to handset registration of cordless telephone master unit 100 from master unit information storage unit 304 at the start of operation. That is, from the base unit information storage unit 304, the base unit identification information of the registered cordless telephone base unit 100, information identifying whether the base unit identification information is from the registered control station or is notified from the wireless handset 200, Carrier 9 support information indicating whether or not communication with carrier number 9 is supported is read. Flow then proceeds to step 702 .

At step 702, it is determined whether or not there is information relating to the base unit identification information of the cordless telephone base unit 100. FIG. If the base unit identification information of the cordless telephone base unit is stored in the base unit information storage unit 304 (step 702: Yes), the control unit 320 proceeds to step 703, and if the cordless telephone base unit is not registered. That is, if the base unit identification information of the cordless telephone base unit stored in base unit information storage unit 304 is an invalid value (ALL0) (step 702: No), the flow proceeds to step 711. FIG.

In step 703, synchronization is established with cordless telephone base station 100 and cordless telephone base station 100 begins receiving a first control signal. First, the control section 320 controls the radio section 301 and the frame processing section 302 so as to perform continuous reception while sequentially changing the reception frequency. At this time, the control unit 320 selects the first carrier frequency group of carrier numbers 0, 1, 2, 3, 4, and 9 and the carriers belonging to the second carrier frequency group as the reception frequencies for searching for the parent device. The frequencies are sequentially selected, the radio signal of the selected carrier frequency is received, the master unit identification information is extracted from the received signal based on the sync word, and the master unit of the cordless telephone master unit 100 stored in the master unit information storage unit 304 is obtained. The radio section 301 and the frame processing section 302 are controlled so as to receive frames and slots in synchronization with the control signal (first control signal) transmitting the device identification information, and the frame communication with the cordless telephone master device 100 is performed. , to establish slot synchronization. Flow then proceeds to step 704 .

At step 704, a determination is made as to the source of the base unit identification information of the cordless telephone base unit 100. FIG. Control unit 320 stores the master unit identification information of the cordless telephone master unit in master unit information storage unit 304 when the intercom master unit performs handset registration with cordless telephone master unit 100. If so (step 704: Yes), the flow proceeds to step 705, and if it has been notified from the wireless slave device 200 (step 704: No), the flow proceeds to step 711.

At step 705, control unit 320 instructs cordless telephone base unit 100 to transmit carrier frequencies belonging to the first carrier frequency group and the second carrier frequency group (carrier numbers 0, 1, 2, 3, 4, and 9). corresponding carrier frequency) is available for use. That is, control unit 320 selects a carrier frequency that can be used for communication with cordless telephone base unit 100 based on carrier 9 correspondence information of cordless telephone base unit 100 stored in base unit information storage unit 304, Radio section 301 and frame processing section 302 are controlled to activate wireless communication with cordless telephone base unit 100. When wireless communication with cordless telephone base unit 100 is activated, carrier numbers 0, 1, 2, 3, and 4 are selected. , 9 and the carrier frequencies (carrier numbers) belonging to the second carrier frequency group can be used, and to stop the radio communication. It controls the unit 301 and the frame processing unit 302 . Flow then proceeds to step 711 .

In step 711, the control unit 320 reads all registered handset information. That is, from the handset information storage unit 303, carrier 9 correspondence information indicating whether or not each registered dependent station (wireless handset 200) is compatible with communication of carrier number 9 is read. Flow then proceeds to step 712 .

At step 712, the control unit 320 checks whether or not a dependent station (wireless slave device 200) that does not support communication using the carrier frequencies of the second carrier frequency group (the carrier frequency of carrier number 9) is registered. . That is, the value of the carrier 9 correspondence information of each registered dependent station (wireless slave device 200) read from the slave device information storage unit 303 is confirmed. If even one carrier 9 compatible information of the registered dependent station (wireless slave device 200) is "false" indicating that communication using the carrier frequency of carrier number 9 is not supported (step 712: Yes), Proceeding to step 714 , if “false” is not included in the carrier 9 correspondence information of the registered dependent station (wireless slave device 200 ) (step 712 : No), the flow proceeds to step 713 .

In step 713, the control unit 320 sets the carrier numbers of the carrier frequencies that can be used for the carrier frequencies for the second control signal to all the carrier frequencies included in the first carrier frequency group and the second carrier frequency group. , that is, 0, 1, 2, 3, 4, and 9. Flow then proceeds to step 720 .

At step 714, control section 320 sets the carrier numbers of the carrier frequencies that can be used as the carrier frequencies for the second control signal to numbers corresponding to all carrier frequencies included in the first carrier frequency group, that is, 0 , 1, 2, 3, 4. Flow then proceeds to step 720 .

At step 720, intercom master unit 300 generates a second control signal for informing master unit identification information, communication carrier numbers (0, 1, 2, 3, 4, 9), operation mode (normal mode), and the like. While transmitting, the normal mode for waiting for position registration communication from the dependent station (wireless slave device 200) is activated. The control unit 320 transmits the second control signal in one slot in the frame (hereinafter, the slot for transmitting the second control signal is called the control slot), and the slot other than the control slot (hereinafter, the standby slot ) controls the radio unit 301 and the frame processing unit 302 so as to perform reception. At this time, the second control signal is transmitted at a carrier frequency corresponding to one carrier number selected from among the carrier numbers set in step 713 or step 714 . If synchronization with cordless telephone master unit 100 is established in step 703, control unit 320 receives the first control signal transmitted from cordless telephone master unit 100. control signal reception slot), and while maintaining synchronization with the cordless telephone master unit 100, the slots other than the control signal reception slot are used to transmit the second control signal in one slot. Then, the radio section 301 and the frame processing section 302 are controlled so that reception is performed in another slot. In the standby slot, the signal from the wireless slave device 200 is received while switching the reception frequency for each frame so as to receive signals of carrier frequencies of carrier numbers 0, 1, 2, 3, 4, and 9 for each frame. While holding it, it detects the level of interfering waves. Also, at step 720, processing of movement of the second control signal to avoid interfering with the second control signal is performed. The control unit 320 periodically stops the transmission of the second control signal, and controls the radio unit 301 and the frame processing so as to perform reception on the carrier frequency used for the transmission of the second control signal in the control slot. It controls the section 302 and detects the level of the interfering wave in the control slot. Then, the control unit 320 compares the level of the interfering wave in the combination of each carrier frequency and each slot detected in the standby slot with the level of the interfering wave in the control slot, and the level of the interfering wave is the lowest in step 713 or step radio section 301 and frame processing so as to select a combination of each carrier frequency and slot corresponding to the carrier number set in 714 and restart transmission of the second control signal of the selected carrier frequency in the selected slot. control unit 302;

In step 720, doorphone master unit 300 performs a visitor notification operation. When control unit 320 detects that a call operation has been performed in entrance slave unit 310, display unit 305 causes display unit 305 to display the video signal captured by entrance slave unit 310 on a monitor in the room and to sound an alarm sound. The notification unit 306 is controlled to notify that a visitor is being notified by the second control signal, and to start transmitting a radio signal carrying a video signal captured by the entrance slave unit 310. 310 , radio section 301 and frame processing section 302 . If doorphone master unit 300 is registered as a cordless telephone subordinate station, control unit 320 performs cordless telephone master unit 100 on the basis of carrier 9 compatible information of cordless telephone master unit 100 stored in master unit information storage unit 304 . selects a carrier frequency that can be used for communication with the cordless telephone base station 100; When wireless communication is activated, the cordless telephone master unit 100 is notified of a visitor. Then, the radio unit 301 and the frame processing unit 302 are controlled so that the radio communication is started when the radio communication activation request is received in the standby slot. When the controller 320 is notified that a response operation has been performed from the wireless slave device 200 or the intercom master device 300, the control unit 320 controls the audio unit 309 to perform a voice call, and notifies that the call has ended. Then, it controls the entrance slave unit 310, the audio unit 309, the radio unit 301, and the frame processing unit 302 so as to stop the visitor notification operation, wireless communication, and voice call.

Further, in step 720, doorphone master unit 300 controls radio unit 301 and frame processing unit 302 to start radio communication when receiving a radio communication activation request in the standby slot, and receives a message from radio slave unit 200. do. If the received message is a message notifying the carrier frequency (carrier number) that can be used by the wireless slave device 200 as the transmission source, the carrier corresponding to the wireless slave device 200 as the transmission source in the slave device information storage unit 303 is received. 9 Update the correspondence information. For example, when wireless slave device 200 notifies that carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, and 4 are available, wireless slave device 200 that is the transmission source of slave device information storage unit 303 When "false" is written in the corresponding carrier 9 correspondence information and the wireless slave device 200 notifies that carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, 4, and 9 are available, the slave device “true” is written in the carrier 9 correspondence information corresponding to the wireless slave device 200 of the transmission source in the information storage section 303 . If the received message is the base unit identification information of a cordless phone and the base unit identification information in base unit information storage unit 304 is ALL0, the parent The device identification information is written, and the fact that the parent device identification information is notified from the wireless slave device 200 is stored. After receiving the message, the radio section 301 and the frame processing section 302 are controlled to stop radio communication, and the flow proceeds to step 721 .

At step 721, the control unit 320 determines whether or not the slave device information has been updated. That is, it is determined whether the information corresponding to carrier 9 in the child device information storage unit 303 has been updated in the communication with the wireless child device 200 in step 720 . If the carrier 9 correspondence information has been updated (step 721: Yes), the flow proceeds to step 711, and if the carrier 9 correspondence information has not been updated (step 721: No), the flow proceeds to step 722.

At step 722, control unit 320 determines whether the parent device information has been updated. That is, it is determined whether or not the parent device identification information in the parent device information storage unit 304 has been updated in the communication with the wireless slave device 200 in step 720 . If the parent device identification information has been updated (step 722: Yes), the flow proceeds to step 701;

Note that the notification of the available carrier frequency (carrier number) in step 705 is, for example, in the DECT communication protocol, an information element (IWU -TO-IWU).

In step 720, the parent device identification information and the carrier number for communication are reported by a signal called Dummy bearer in the DECT communication protocol. , and the carrier number for communication is reported by a signal called RF-carriers in static system info of System information and multiframe marker (QT).

This is the end of the description of the operation of the intercom master unit of the wireless communication system according to the first embodiment.

Next, the operation of registering the wireless slave device 200 in the intercom master device 300 of the wireless communication system according to the first embodiment will be described.

FIG. 8 is a flowchart showing an operation example of the wireless slave unit registration operation of the intercom master unit 300 of the wireless communication system according to the first embodiment.

The wireless slave device registration operation shown in FIG. 8 is an operation that is started when an operation for activating the registration mode of the wireless slave device 200 is performed on the operation unit 308 in step 720 of FIG. 7 described above. When the operation unit 308 is operated to activate the registration mode of the wireless slave device 200 in step 720 , the flow proceeds to step 801 .

At step 801, control section 320 sets the carrier numbers of carrier frequencies that can be used as the carrier frequencies for the second control signal to numbers corresponding to all carrier frequencies included in the first carrier frequency group, that is, 0 , 1, 2, 3, 4. Flow then proceeds to step 802 .

In step 802, intercom master unit 300 performs a second control for announcing master unit identification information, communication carrier numbers (0, 1, 2, 3, 4, 9), operation mode (slave unit registration mode), and the like. While transmitting the signal, the slave unit registration mode is activated to wait for the slave unit registration request from the dependent station (wireless slave unit 200). The control unit 320 transmits the second control signal on the carrier frequency selected from among the carrier frequencies corresponding to the carrier number set in step 801, and receives the signal from the dependent station (wireless slave device 200) in the standby slot. It controls the wireless unit 301 and the frame processing unit 302 so as to receive the slave unit registration request. That is, in the standby state of step 720, if the control unit 320 transmits the first control signal at a carrier frequency belonging to the second carrier frequency group (carrier frequency corresponding to carrier number 9), After the transition to , each carrier frequency detected in the waiting slot and the level of the interfering wave in each slot combination are compared, and each carrier frequency corresponding to the carrier number set in step 801 with the lowest interfering wave level (the The radio unit 301 and the frame processing unit 302 are configured to select a combination of a carrier frequency belonging to one carrier frequency group) and a slot, and transmit a second control signal of the selected carrier frequency in the selected slot. Control. Further, after transitioning to step 802, the control unit 320 controls the display unit 305 to display that the wireless slave unit is being registered, and the notification unit 306 to notify that the wireless slave unit is being registered. Then, the radio unit 301 and the frame processing unit 302 are controlled so that the radio communication is started when the radio communication activation request is received in the standby slot. When the slave unit registration sequence is completed, the radio unit 301, the frame processing unit 302, the display unit 305, and the notification unit 306 are controlled so as to disconnect the wireless communication and stop the slave unit registration operation, and the flow proceeds to step 803. move on. In step 802, if the sequence of handset registration with the wireless handset 200 cannot be completed within the predetermined time, the flow proceeds to step 711 (not shown).

In step 803, intercom master unit 300 updates the slave unit information. That is, the control unit 320 writes the handset identification information notified during the handset registration sequence to the handset information storage unit 303 and writes “false” to the carrier 9 corresponding information corresponding to the wireless handset 200 . Then, the slave unit registration processing is terminated, and the standby state of step 720 in FIG. 7 is resumed.

Note that the wireless communication performed between the intercom master unit 300 and the wireless slave unit 200 in step 803 is, for example, wireless communication for slave unit registration (obtaining access rights) in the DECT communication protocol. A request message (ACCESS-RIGHT-REQEST) and a handset registration response message (ACCESS-RIGHT-ACCEPT) are transmitted and received.

This concludes the description of the operation of registering the wireless slave device 200 in the intercom master device 300 of the wireless communication system according to the first embodiment.

Next, the operation of registering the intercom master unit 300 of the wireless communication system in the first embodiment with the cordless telephone master unit will be described.

FIG. 9 is a flow chart showing an operation example of a cordless phone registration operation of the intercom base unit of the wireless communication system according to the first embodiment.

The cordless telephone registration operation shown in FIG. 9 is an operation that is activated when an operation for activating the registration mode to cordless telephone base unit 100 is performed on operation unit 308 in step 720 of FIG. 7 described above. When the operation unit 308 is operated to activate the registration mode for the wireless telephone 100 in step 720 , the flow proceeds to step 901 .

At step 901, a search is made for a control station (cordless telephone base unit 100) operating in the handset registration mode. Establish synchronization with the control station. The control unit 320 controls the radio unit 301 and the frame processing unit 302 so as to perform continuous reception while sequentially changing the reception frequency. At this time, the control unit 320 uses the first carrier frequency group of carrier numbers 0, 1, 2, 3, 4, and 9 and the carriers belonging to the second carrier frequency group as reception frequencies for searching for the control station. The frequencies are selected sequentially, the radio signal of the selected carrier frequency is received, the master unit identification information and operation mode are extracted from the received signal based on the sync word, and the control station (cordless telephone master unit) operating in the slave unit registration mode 100) and controls the radio section 301 and frame processing section 302 so as to receive frames and slots in synchronization with the control station. Flow then proceeds to step 902 . It should be noted that if, in step 902, synchronization with the control station in registration mode could not be established within a predetermined time, the flow proceeds to step 711 (not shown).

At step 902, the control unit 320 continues to receive the control signal (first control signal) transmitted from the synchronized control station (cordless telephone master unit 100), and selects the carrier frequency that can be used for communication with the control station. to receive information about Then, the control unit 320 selects a carrier frequency for communication based on the received information on carrier frequencies usable for communication with the control station, and performs wireless communication with the synchronized control station (cordless telephone master unit 100). , start the child device registration sequence, notify the self-identification information of the parent device as the child device identification code, perform mutual authentication, register the child device, and stop wireless communication. It controls the radio section 301 and the frame processing section 302 . Then, the control unit 320 writes the received base unit identification information and carrier frequency information (carrier 9 correspondence information) that can be used for communication with the control station into the base unit information storage unit 304 so that the base unit identification information is Write down what is written by handset registration. Flow then proceeds to step 705 of FIG. 7 described above (not shown).

The wireless communication performed between the control station (cordless telephone master unit 100) and the intercom master unit 300 in step 902 is, for example, wireless communication for obtaining access rights in the DECT communication protocol. Yes, a handset registration request message (ACCESS-RIGHT-REQEST) and a handset registration response message (ACCESS-RIGHT-ACCEPT) are transmitted and received.

This is the end of the description of the operation of registering the intercom master unit 300 of the wireless communication system in the first embodiment with the cordless telephone master unit.

Next, the operation when the wireless communication system according to the first embodiment is configured by combining devices with different usable carrier frequencies will be described. In each sequence diagram used in the following description, the carrier number corresponding to the transmission frequency that can be used for transmission of the message is indicated by the number following "transmission carrier:".

First, the cordless telephone master unit 100 and the wireless slave unit 200 that communicate with the carrier frequencies corresponding to the carrier numbers 0, 1, 2, 3, 4 and 9, the carrier numbers 0, 1, 2, 3 and 4 A description will be given of the operation when intercom master unit 300 that communicates on a carrier frequency corresponding to a carrier number is used in combination and intercom master unit 300 is not registered as a slave unit of cordless telephone master unit 100 .

FIG. 10 is a sequence diagram showing an operation example of the cordless telephone master unit 100 and wireless slave unit compatible with 6 carriers and the intercom master unit compatible with 5 carriers in the first embodiment.

FIG. 10 shows that both the cordless telephone master unit 100 and the doorphone master unit 300 are registered in the cordless telephone master unit 100 from a state in which the wireless slave unit 200 is not registered, and the wireless slave unit 200 is registered in the doorphone master unit 100 . It shows the sequence when it is registered in

As shown in FIG. 10, during operation in the normal mode, cordless telephone base station 100 selects one carrier frequency from carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, 4, and 9. is selected to transmit the control signal (sequence 1101). In the control signal, the master unit identification information, the carrier number of the usable carrier frequency, and the control signal for notifying the operation mode (operating in the normal mode) are repeatedly transmitted (not shown).

When the handset registration mode activation operation is performed during standby in the normal mode (sequence 1102), the handset registration mode is activated, and the cordless telephone base unit 100 is set to carrier numbers 0, 1, 2, 3, and 4. One carrier frequency selected from the carrier frequencies corresponding to the numbers is selected and the control signal is transmitted (sequence 1103). At this time, cordless telephone base unit 100 uses a carrier frequency corresponding to a carrier number selected from five carrier numbers 0, 1, 2, 3, and 4 to transmit base unit identification information, available A control signal that notifies the carrier number of the carrier frequency and the operation mode (operating in the registration mode) is repeatedly transmitted (not shown).

On the other hand, when the wireless slave unit 200 activates the slave unit registration mode for the cordless telephone master unit (sequence 1201), continuous reception is performed at carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, 4, and 9. to search for cordless telephone base units that are in registration mode. When the control signal of cordless telephone base station 100 in the registration mode is received (sequence 1202), time-division multiplex communication synchronization with cordless telephone base station 100 is established, and the carrier frequency notified by the received usable carrier is established. A carrier frequency is selected from among, wireless communication with cordless telephone base unit 100 is started, and a handset registration request is transmitted (sequence 1203).

Upon receiving the handset registration request, cordless telephone base unit 100 activates an authentication sequence for handset registration, transmits and receives authentication calculation random numbers for mutual authentication, authentication calculation results, etc. (sequence 1104). When the registration authentication sequence is correctly completed, a slave unit registration acceptance message for notifying that the slave unit registration has been accepted is transmitted to the wireless slave unit 200 (sequence 1105).

When wireless slave unit 200 completes the slave unit registration authentication sequence (sequence 1204) and receives the message of slave unit registration acceptance (sequence 1205), wireless slave unit 200 transmits a location registration request message, and transmits a position registration request message on the carrier frequency of carrier number 9. communication is supported (sequence 1206).

Upon receiving the location registration request (sequence 1106), cordless telephone base unit 100 activates the location registration authentication sequence, transmits and receives authentication calculation random numbers, authentication calculation results, etc. (sequence 1107), and executes the location registration authentication sequence. When the process ends correctly, it transmits a position registration acceptance message notifying that the position registration has been accepted to the wireless slave device 200 (sequence 1108). Then, upon receiving a notification that it supports communication on the carrier frequency of carrier number 9, it starts transmitting control signals on the carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, 4, and 9. (sequence 1109).

When the location registration authentication sequence is completed (sequence 1207) and the location registration acceptance message is received (sequence 1208), wireless slave device 200 continues receiving the control signal transmitted from cordless telephone 100 and maintains synchronization. Then, the standby operation as a slave station of the cordless telephone base station is started (sequence 1209).

Next, the registration operation with doorphone base unit 300 will be described.

As shown in FIG. 10, during operation in the normal mode, intercom master unit 300 selects one carrier frequency selected from carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, and 4. control signal is transmitted (sequence 1301). In the control signal, the master unit identification information, the carrier number of the usable carrier frequency, and the control signal for notifying the operation mode (operating in the normal mode) are repeatedly transmitted (not shown).

When an operation for activating the slave unit registration mode is performed during standby in the normal mode (sequence 1302), the slave unit registration mode is activated, and intercom base unit 300 receives carrier numbers 0, 1, 2, 3, and 4. A control signal is transmitted by selecting one carrier frequency selected from the carrier frequencies corresponding to (sequence 1303). At this time, cordless telephone base unit 100 uses a carrier frequency corresponding to a carrier number selected from five carrier numbers 0, 1, 2, 3, and 4 to transmit base unit identification information, available A control signal that notifies the carrier number of the carrier frequency and the operation mode (operating in the registration mode) is repeatedly transmitted (not shown).

On the other hand, when the wireless slave unit 200 activates the slave unit registration mode for the intercom master unit 300 (sequence 1211), continuous reception is performed at carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, 4, and 9. to search for intercom master unit 300 in registration mode. Then, when receiving the control signal of intercom master unit 300 in the registration mode (sequence 1212), it establishes synchronization of time division multiplex communication with intercom master unit 300, to start wireless communication with intercom master unit 300 and transmit a slave unit registration request (sequence 1213).

Upon receiving the slave unit registration request (sequence 1313), intercom master unit 300 activates the authentication sequence for slave unit registration, and transmits and receives authentication calculation random numbers for mutual authentication, authentication calculation results, etc. (sequence 1314). When the slave unit registration authentication sequence is correctly completed, a slave unit registration acceptance message for notifying that the slave unit registration has been accepted is transmitted to the wireless slave unit 200 (sequence 1315).

When the wireless slave unit 200 completes the slave unit registration authentication sequence (sequence 1214) and receives the slave unit registration acceptance message (sequence 1215), the wireless slave unit 200 transmits a location registration request message, and receives the message on the carrier frequency of carrier number 9. (sequence 1216), and transmits a message notifying the base unit identification information of cordless telephone base unit 100 (sequence 1217).

When doorphone master unit 300 receives the location registration request (sequence 1316) and receives the message notifying the master unit identification information of cordless telephone master unit 100 (sequence 1317), doorphone master unit 300 activates the location registration authentication sequence, and performs authentication calculation. Random numbers, authentication calculation results, etc. are transmitted and received (sequence 1318), and when the location registration authentication sequence ends correctly, a location registration acceptance message for notifying that location registration has been accepted is transmitted to wireless slave device 200 (sequence 1318). 1319). Then, upon receiving the notification of the base unit identification information of the cordless telephone base unit 100, the cordless telephone base unit stops transmission of the control signal and performs continuous reception at carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, and 4. Start searching for machines.

When wireless slave device 200 completes the location registration authentication sequence with intercom master device 300 (sequence 1218) and receives a location registration acceptance message (sequence 1219), wireless slave device 200 selects carrier numbers 0, 1, 2, 3, 4, A search for a cordless telephone master unit that performs continuous reception on a carrier frequency corresponding to 9 is started. Then, when receiving the control signal of the cordless telephone master unit 100, it establishes synchronization with the cordless telephone master unit 100, transmits a location registration request message, and confirms that it does not support communication on the carrier frequency of carrier number 9. is notified (sequence 1221).

Upon receiving the location registration request (sequence 1121), cordless telephone base unit 100 activates the location registration authentication sequence, transmits and receives authentication calculation random numbers, authentication calculation results, etc. (sequence 1122), and initiates the location registration authentication sequence. When the process ends correctly, it transmits a location registration acceptance message notifying that the location registration has been accepted to the wireless slave device 200 (sequence 1123). Then, upon receiving a notification that the carrier frequency of carrier number 9 is not compatible with communication, it starts transmitting control signals on the carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, and 4 (sequence 1124).

Radio slave device 200 transmits a location registration request message in sequence 1221 to notify that communication on the carrier frequency of carrier number 9 is not supported, and then authenticates location registration with cordless telephone master device 100 . When the sequence ends (sequence 1222) and the message of location registration acceptance is received (sequence 1223), the reception of the control signal of cordless telephone master unit 100 is continued (sequence 1224), and synchronization with cordless telephone master unit 100 is maintained. Then, in each slot excluding the slot in which the control signal of the cordless telephone base unit 100 is received, search is performed for the intercom base unit that receives at carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, 4, and 9. to start.

Doorphone master unit 300, which has been searching for a cordless telephone master unit that performs continuous reception at carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, and 4, receives a control signal transmitted from cordless telephone master unit 100. Then (sequence 1330), synchronization with cordless telephone master unit 100 is established, reception of control signals transmitted from cordless telephone master unit 100 is continued, synchronization is maintained, and control signal transmission is started (sequence 1331). ).

Radio slave unit 200, which has been searching for a control signal for intercom master unit 300 while receiving the control signal for cordless telephone master unit 100, receives the control signal transmitted from intercom master unit 300 (sequence 1231). It operates so as to continuously receive the control signal of the cordless telephone master unit 100 and the control signal transmitted from the intercom master unit 300 (not shown).

As described above, the intercom master unit 300 operating at five carrier frequencies transmits a control signal in synchronization with the control signal of the cordless telephone master unit 100 having the master unit identification information notified from the radio slave unit 200. , the cordless telephone master unit 100 operating at six carrier frequencies operates to transmit control signals at five carrier frequencies excluding the carrier frequencies notified from the wireless slave unit 200. Even if a telephone 100, a radio slave unit 200, and a doorphone master unit 300 compatible with 5 carriers are combined and the doorphone master unit 300 is operated without being registered in the cordless telephone master unit 100, failure due to a difference in usable carrier frequencies is caused. does not occur.

As described above, the cordless telephone master unit 100 and radio slave unit 200, which perform communication at carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, 4, and 9, carrier numbers 0, 1, 2, 3, and 4, respectively. The explanation of the operation when the intercom master unit 300 that communicates at the carrier frequency corresponding to the carrier number is used in combination and the intercom master unit 300 is not registered as the slave unit of the cordless telephone master unit 100 is finished.

Next, the cordless telephone master unit 100 and the intercom master unit 300 which communicate with carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, 4, and 9, carrier numbers 0, 1, 2, 3, and 4. The operation when the wireless handset 200 that communicates at the carrier frequency corresponding to the carrier number of the cordless telephone master set 300 is registered as the handset of the cordless telephone master set 100 will be described.

FIG. 11 is a sequence diagram showing an operation example of the cordless telephone master unit 100 and the intercom master unit 300 compatible with 6 carriers and the radio slave unit 200 compatible with 5 carriers in the first embodiment.

FIG. 11 shows that both the cordless telephone master unit 100 and the doorphone master unit 300 are registered in the cordless telephone master unit 100 from a state where the wireless slave unit 200 is not registered. , and after registration of each slave unit is completed, doorphone master unit 300 starts the operation of notifying a visitor. In the operation of registering wireless slave device 200 with intercom master device 100, the same sequence numbers are assigned to the same sequence as in FIG. 10 to simplify the description.

As shown in FIG. 11, during operation in the normal mode, cordless telephone base station 100 selects one carrier frequency from carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, 4, and 9. is selected to transmit the control signal (sequence 2101). In the control signal, the master unit identification information, the carrier number of the usable carrier frequency, and the control signal for notifying the operation mode (operating in the normal mode) are repeatedly transmitted (not shown).

When the slave unit registration mode activation operation for registering doorphone master unit 300 as a subordinate station is performed during standby in the normal mode (sequence 2102), the slave unit registration mode is activated, and cordless telephone master unit 100 is connected to the carrier. One carrier frequency selected from carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, and 4 is selected and a control signal is transmitted (sequence 2103). At this time, cordless telephone base unit 100 uses a carrier frequency corresponding to a carrier number selected from five carrier numbers 0, 1, 2, 3, and 4 to transmit base unit identification information, available A control signal for notifying the carrier number of the carrier frequency and the operation mode (operating in the registration mode) is repeatedly transmitted (not shown).

Doorphone master unit 300 selects one carrier frequency from among carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, 4, and 9, and transmits a control signal ( (sequence 1301), and when the handset registration mode for registering as a subordinate station of the cordless telephone base unit 300 is activated (sequence 2301), the transmission of the control signal is stopped, and the carrier number 0, The carrier frequencies corresponding to 1, 2, 3, 4 and 9 are continuously received to search for the cordless telephone base unit in the registration mode. When the control signal of cordless telephone base station 100 in the registration mode is received (sequence 2303), time-division multiplex communication synchronization with cordless telephone base station 100 is established, and the carrier frequency notified by the received usable carrier is established. A carrier frequency is selected from among, wireless communication with cordless telephone base unit 100 is started, and a handset registration request is transmitted (sequence 2304).

When cordless telephone base unit 100 receives the handset registration request (sequence 2104), it starts the authentication sequence for handset registration, and transmits and receives the authentication calculation random number for mutual authentication, the authentication calculation result, etc. (sequence 2105). ), when the handset registration authentication sequence is correctly completed, a handset registration acceptance message for notifying that the handset registration has been accepted is transmitted to intercom base unit 300 (sequence 2106).

When doorphone master unit 300 completes the authentication sequence for slave unit registration (sequence 2305) and receives the message for slave unit registration acceptance (sequence 2306), doorphone master unit 300 transmits a message for requesting location registration, and uses the carrier frequency of carrier number 9. communication is supported (sequence 2307).

Upon receiving the location registration request (sequence 2107), cordless telephone base unit 100 activates the location registration authentication sequence, transmits and receives authentication calculation random numbers, authentication calculation results, etc. (sequence 2108), and initiates the location registration authentication sequence. When the process ends correctly, a position registration acceptance message is transmitted to intercom master unit 300 to notify that the position registration has been accepted (sequence 2109). Then, upon receiving a notification that it supports communication on the carrier frequency of carrier number 9, it starts transmitting control signals on the carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, 4, and 9. (sequence 2110).

Upon completion of the location registration authentication sequence (sequence 2308) and receipt of the location registration acceptance message (sequence 2309), intercom master unit 300 continues receiving the control signal transmitted from cordless telephone 100 to maintain synchronization. Then, the standby operation of the cordless telephone master station as a dependent station is started (sequence 2310). Then, intercom master unit 300 selects one carrier frequency from carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, 4, and 9, and restarts transmission of the control signal. (sequence 2311).

Next, a sequence for registering the wireless slave device 200 to the intercom master device 300 will be described.

10, when the wireless slave device 200 activates the slave device registration mode for the doorphone master device 300 (sequence 1211), the search for the doorphone master device 300 is activated. 300 (sequence 1212), slave unit registration sequences (sequences 1213, 1214, and 1215) and location registration sequences (sequences 1216, 1217, 1218, and 1219) are executed. After completion of location registration, doorphone master unit 300 continues to receive the control signal, maintains synchronization, and enters a standby state for doorphone operation (sequence 2220). At this time, in the example of FIG. 11, since the wireless slave device 200 does not support communication on the carrier frequency corresponding to carrier 9, the wireless slave device 200 uses carrier numbers 0, 1, 2, 3, A search for the control signal of intercom master unit 300 is performed by continuous reception at the carrier frequency corresponding to carrier number 4, and in sequence 1216 in FIG. send a message of Further, since wireless handset 200 has not been registered with cordless telephone base unit 100, in sequence 1217 for transmitting a message for notifying base unit identification information of cordless telephone base unit 100 in FIG. ALL0 is notified as identification information.

On the other hand, in the intercom master unit 300, when an operation to activate the slave unit registration mode is performed during standby in the normal mode (sequence 1302), the slave unit registration mode is activated and the intercom master unit 300 is activated. Base unit 300 receives the control signal of cordless phone base unit 100, and while maintaining synchronization, selects one carrier frequency from carrier numbers corresponding to carrier numbers 0, 1, 2, 3, and 4. A carrier frequency is selected and a control signal is transmitted (sequence 1303). Then, in the same manner as described above with reference to FIG. 10, a slave unit registration sequence (sequences 1313, 1314, and 1315) and a location registration sequence (sequences 1316, 1317, 1318, and 1319) are executed. . Then, in sequence 1316 of FIG. 11, since it is notified that communication on the carrier frequency of carrier number 9 is not supported, after completion of location registration, the control signal of cordless telephone base unit 100 is received and synchronization is maintained. Meanwhile, one carrier frequency selected from carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, and 4 is selected and a control signal is transmitted (sequence 2320). Since doorphone base unit 300 itself has registered as a base unit in cordless telephone base unit 100, the base unit identification information of cordless telephone base unit 100 notified from wireless base unit 200 in sequence 1317 in FIG. It will be ignored.

Next, the operation of the visitor notification will be described.

When a call operation is performed in entrance slave unit 310, doorphone master unit 300 starts controlling a visitor notification (sequence 2311).

When doorphone master unit 300 starts control of the visitor notification, doorphone master unit 300 notifies the visitor notification with the control signal transmitted on the carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, and 4 (sequence 2312). . Then, a radio signal carrying a video signal photographed by the entrance handset unit 310 using a carrier frequency selected from carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, and 4 is generated. Transmission is started (sequence 2313). Thereafter, transmission of the control signal for notifying the visitor and transmission of the video data are continued (not shown). It should be noted that the slot and carrier number in which the radio signal containing the video signal is transmitted are transmitted as part of the data of the control signal for notifying the visitor.

Further, when doorphone base unit 300 starts controlling a visitor notification, it selects one carrier from carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, 4, and 9, and cordless telephone base unit 100 selects one carrier. and transmits a call connection request (sequence 2314). Then, when the call connection response is received (sequence 2315), a visitor notification is transmitted as an information notification message (sequence 2316).

On the other hand, when the wireless slave device 200 receives the control signal for the visitor notification and is notified of the slot and carrier number of the wireless signal carrying the video signal (sequence 2212), the carrier number is assigned to the notified slot. Reception at the corresponding carrier frequency is started (sequence 2213), a notification sound for notification of a visitor notification is generated, and playback of the received video is started.

When cordless telephone base unit 100 receives a call connection request after starting wireless communication (sequence 2114), it transmits a call connection response (sequence 2115), and receives a visitor notification in the information notification message (sequence 2114). 2116), a notification sound for notifying the arrival of a visitor is generated to indicate that a visitor is present.

As described above, doorphone master device 300 communicates with doorphone master device 300 based on the available carrier information notified from doorphone master device 300, and uses the notified usage information notified from wireless slave device 200. Based on the available carrier information, the carrier frequency to be used in the control signal is determined. Also, there is no interference due to differences in available carrier frequencies. Similarly, even if the cordless telephone master unit 100 corresponding to 5 carriers, the intercom master unit 300 corresponding to 6 carriers, and the radio slave unit 200 are operated in combination, no trouble occurs due to the difference in usable carrier frequencies.

As described above, the cordless telephone master unit 100 and the intercom master unit 300 that perform communication at carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, 4, and 9, carrier numbers 0, 1, 2, 3, and 4 The operation when the wireless handset 200 that communicates at the carrier frequency corresponding to the carrier number is used in combination and the intercom base unit 300 is registered as the handset of the cordless telephone base unit 100 will be described.

Although the present invention has been described with reference to examples of preferred embodiments thereof, it should be readily apparent to those skilled in the art that the present invention is not limited to such examples, and that the spirit of the present invention is not limited to such examples. can be changed as appropriate within a range that does not deviate from For example, in the present embodiment, the cordless telephone master unit is used as the first control station, and the door phone master unit is used as the second control station. control station may be a cordless telephone base station. Also, the first control station and the second control station may be control stations of a home automation network to which sensors and cameras are connected. Moreover, all of the components shown in the above embodiments are not necessarily essential, and can be appropriately selected without departing from the gist of the present invention.

INDUSTRIAL APPLICABILITY A radio communication apparatus according to the present invention is useful as a radio communication system that selects one carrier frequency from a plurality of carrier frequencies and performs radio communication.

100 cordless telephone base unit 101 radio unit 102 frame processing unit 103 handset information storage unit 105 display unit 106 notification unit 108 operation unit 110 line control unit 120 control unit 200 radio handset 201 radio unit 202 frame processing unit 203 base unit information storage Unit 205 Display unit 206 Notification unit 208 Operation unit 209 Audio unit 220 Control unit 300 Intercom base unit 301 Wireless unit 302 Frame processing unit 303 Child unit information storage unit 304 Base unit information storage unit 305 Display unit 306 Notification unit 308 Operation unit 309 Voice Part 310 Entrance handset part 320 Control part

Claims (4)

Consists of a first control station, a second control station, and a dependent station, and each device mutually uses a carrier frequency belonging to the first carrier frequency group or the second carrier frequency group to perform radio communication by time-division multiplex communication A wireless communication system for communicating,
The first carrier frequency group is composed of at least one carrier frequency,
The second carrier frequency group is composed of at least one carrier frequency excluding carrier frequencies belonging to the first carrier frequency group,
The first control station
Broadcasting a first control signal including information indicating whether or not communication is possible on carrier frequencies belonging to the second carrier frequency group,
The second control station,
A second control station that receives the first control signal, operates in synchronization with the first control station, and includes information indicating whether or not communication is possible on carrier frequencies belonging to the second carrier frequency group. announcing a control signal,
Said dependent station:
receiving the first control signal and operating in synchronization with the first control station, receiving the second control signal and operating in synchronization with the second control station;
The first control signal notifies that communication is possible at a carrier frequency belonging to the second carrier frequency group, and the second control signal indicates a carrier frequency belonging to the second carrier frequency group. When it is notified that communication is not possible at the carrier frequencies belonging to the second carrier frequency group, a third control signal including information indicating that communication is not possible at the carrier frequencies belonging to the second carrier frequency group is sent to the first control station. send to the first control station,
The first control station
upon receiving the third control signal from the dependent station, transmitting the first control signal using a carrier frequency belonging to the first carrier frequency group;
wireless communication system. When the dependent station is registered with the first control station and the second control station, the dependent station notifies the second control station of identification information of the first control station;
When the second control station is notified of the identification information from the dependent station, the second control station receives the first control signal and operates in synchronization with the first control station.
A wireless communication system according to claim 1 . Consists of a first control station, a second control station, and a dependent station, and each device mutually uses a carrier frequency belonging to the first carrier frequency group or the second carrier frequency group to perform radio communication by time-division multiplex communication A wireless communication system for communicating,
The first carrier frequency group is composed of at least one carrier frequency,
The second carrier frequency group is composed of at least one carrier frequency excluding carrier frequencies belonging to the first carrier frequency group,
The first control station
Broadcasting a first control signal including information indicating whether or not communication is possible on carrier frequencies belonging to the second carrier frequency group,
The second control station,
receiving the first control signal and operating in synchronization with the first control station;
When the first control signal notifies that communication is possible on carrier frequencies belonging to the second carrier frequency group, the first carrier frequency group and the second carrier frequency group Communicate with the first control station using the carrier frequency to which it belongs,
When the first control signal notifies that communication is not possible at carrier frequencies belonging to the second carrier frequency group, the carrier frequencies belonging to the first carrier frequency group are used to perform the first communication. Communicate with the control station,
any carrier frequency belonging to the first carrier frequency group or the second carrier frequency group when the dependent station capable of communication on carrier frequencies belonging to the second carrier frequency group is registered sending a second control signal using
When the dependent station not capable of communication on carrier frequencies belonging to the second carrier frequency group is registered, the second control signal is generated using any carrier frequency belonging to the first carrier frequency group. to send a
wireless communication system. The second control station,
transmitting the second control signal using any carrier frequency belonging to the first carrier frequency group when the registration mode of the dependent station is activated;
A wireless communication system according to claim 3.

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