JP7289052B2 - wireless communication device - Google Patents

Description

The present invention relates to a radio communication apparatus used in a radio communication system in which a control station and dependent stations communicate with each other using radio signals.

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) has been promoted, and cordless telephones, door phones, etc. that operate in DECT time-division multiplex communication have been commercialized.

For example, Patent Literature 1 discloses a radio communication system technology in which registered dependent stations perform time-division multiplex communication while receiving control signals from a control station, similar to the DECT system.

JP 2007-013539 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.

By the way, for example, in the wireless communication system of Patent Document 1, a dependent station receives a control signal transmitted from a control station, synchronizes time-division multiplex communication between the control station and the dependent station, and performs communication between the control station and the dependent station. communicate. The control station transmits a control signal using one carrier out of the carriers allocated according to the wireless communication system, and the dependent stations sequentially receive the carriers allocated according to the wireless communication system, and control It searches for control signals transmitted from the station, finds the carrier used by the control station, and communicates with the control station.

Therefore, when a usable carrier is added in the middle like the DECT system in Japan, wireless communication consists of a control station that can use the added carrier and a dependent station that cannot communicate with the added carrier. The system leaves room for improvement in the control that selects the carrier frequency.

The present invention has been devised to improve such prior art, and its main purpose is to operate as a control station in which dependent stations with different usable carrier frequencies are registered, and to An object of the present invention is to provide a wireless communication device that performs frequency selection.

A radio communication device according to an aspect of the present invention is a radio communication device that operates as the control station in a radio communication system that includes a control station and a dependent station, and is configured with at least one carrier frequency. or a carrier frequency belonging to a second carrier frequency group composed of at least one carrier frequency excluding the carrier frequencies belonging to the first carrier frequency group. and broadcasting a control signal containing information necessary for communication, and broadcasting the control signal containing information indicating that registration of the dependent station is being accepted using a carrier frequency belonging to the first carrier frequency group. exchanging information with the dependent station by radio communication, registering the dependent station, and being notified by the dependent station that it is possible to use carrier frequencies belonging to the second carrier frequency group; A control signal including information necessary for the communication is broadcast using carrier frequencies belonging to the first carrier frequency group or the second carrier frequency group.

According to the present invention, it is possible to provide a radio communication apparatus that operates as a control station in which dependent stations with different available carrier frequencies are registered and that selects the optimum carrier frequency.

FIG. 1 is a block diagram showing a configuration example of a base unit of a cordless telephone according to the first embodiment; FIG. 2 is a block diagram showing a configuration example of a handset of the cordless telephone according to the first embodiment; 3 is a flow chart showing an operation example of the base unit of the cordless telephone according to the first embodiment; FIG. 4 is a sequence diagram showing an operation example when the master unit of the cordless telephone according to the first embodiment starts the slave unit registration mode; FIG. 3 is a sequence diagram showing an operation example of handset registration of the cordless phone base and handset in the first embodiment; FIG. 4 is a sequence diagram showing an operation example when the base unit of the cordless telephone according to the first embodiment is notified that carrier number 9 is supported; FIG. 11 is a sequence diagram showing an operation example when a handset that does not support communication on a carrier frequency corresponding to carrier number 9 is registered in the base of the cordless telephone according to the first embodiment;

A radio communication device of a first invention, which has been made to solve the above problems, is a radio communication device that operates as the control station in a radio communication system comprising a control station and a dependent station, wherein at least one carrier using carrier frequencies belonging to a first carrier frequency group made up of frequencies, or carrier frequencies belonging to a second carrier frequency group made up of at least one carrier frequency excluding carrier frequencies belonging to the first carrier frequency group wirelessly communicate with a dependent station, broadcast a control signal containing information necessary for communication, and transmit information indicating that registration of the dependent station is being accepted using a carrier frequency belonging to the first carrier frequency group; and exchanging information with the dependent station by radio communication, registering the dependent station, and allowing the dependent station to use carrier frequencies belonging to the second carrier frequency group. When notified of this, a control signal including information necessary for the communication is broadcast using carrier frequencies belonging to the first carrier frequency group or the second carrier frequency group.

According to this, the radio communication apparatus of the present invention operating as a control station accepts registration using a carrier frequency selected from carrier frequencies belonging to the first carrier frequency group while accepting registration of a dependent station. Therefore, regardless of whether or not the dependent station to be registered supports operation at carrier frequencies belonging to the second carrier frequency group, the dependent station can be registered by wireless communication. Registration is possible. Further, when notified by the registered dependent station that the carrier frequencies belonging to the second carrier frequency group can be used, the carrier frequencies belonging to the first carrier frequency group or the second carrier frequency group are used. Since a control signal containing information necessary for communication is broadcast using the It becomes possible to select an optimum carrier frequency and transmit a control signal.

According to a second aspect of the present invention, the radio communication apparatus is provided to solve the above problems, when all of the registered dependent stations are capable of using carrier frequencies included in the second carrier frequency group, broadcasting a control signal containing information necessary for the communication using carrier frequencies belonging to the first carrier frequency group or the second carrier frequency group, and at least one of the registered dependent stations, and broadcasting a control signal including information necessary for the communication using carrier frequencies belonging to the first carrier frequency group when the carrier frequencies included in the second carrier frequency group cannot be used. do.

According to this, even if a plurality of dependent stations are registered, depending on the capabilities of the registered dependent stations (whether or not they support operation on carrier frequencies belonging to the second carrier frequency group), Therefore, it becomes possible to select the optimum carrier frequency and transmit the control signal.

A radio communication apparatus according to a third aspect of the present invention, which has been made to solve the above problems, broadcasts a control signal including information indicating carrier frequencies that can be used in communication with the dependent station, and wireless communication with the dependent station using carrier frequencies selected by the dependent station from frequencies, and all carrier frequencies belonging to the first carrier frequency group and the second carrier frequency group The configuration is such that the control signal including information indicating that it can be used is notified.

According to this, even in a state where dependent stations that cannot correspond to carrier frequencies belonging to the carrier frequencies of the second carrier frequency group are registered, communication with dependent stations corresponding to carrier frequencies belonging to the carrier frequencies of the second carrier frequency group is possible. Then, communication using a carrier frequency selected from all carrier frequencies belonging to the first carrier frequency group and the second carrier frequency group is possible, and communication using the optimum carrier frequency becomes possible.

Next, embodiments of the present invention will be described with reference to the drawings.

First, a configuration example of a cordless telephone base unit 100 that operates as a control station of a wireless communication device according to the first embodiment will be described with reference to FIG.

FIG. 1 is a block diagram showing a configuration example of a base unit (wireless communication device) 100 of a cordless telephone according to the first embodiment.

In base 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, carrier number 9, for each registered dependent station (cordless telephone handset 200 described later). Information as to whether or not communication using a carrier frequency is supported (hereinafter referred to as carrier 9 support information) is stored. 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, and the like. Notification unit 106 notifies that the slave unit registration mode has been activated and that an incoming call has been received from the line by means of sound. The operation unit 108 performs input such as activation operation of the slave unit registration mode. The line control unit 110 communicates with a wired telephone line network. The control unit 120 performs overall control of the master device 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 base unit 100 of the cordless telephone according to the first embodiment.

Next, a configuration example of the handset 200 of the cordless telephone according to the first embodiment will be described with reference to FIG.

FIG. 2 is a block diagram showing a configuration example of the handset 200 of the cordless telephone according to the first embodiment.

In handset 200, radio section 201 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 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 timings of time division multiplex communication, and outputs it to the radio unit 201. Synchronization of time-division multiplex communication with base unit 100 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 of the registered control station (cordless telephone base unit 100). 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, and displays the telephone number of the callee input by the operation unit 208, which will be described later. The notification unit 206 notifies that the handset registration mode has been activated and an incoming call from the line by sound. An operation unit 208 performs an operation for activating a slave unit registration mode, inputting a telephone number when making a call, receiving an incoming call, and the like. The control unit 220 performs overall control of the child 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.

A plurality of child devices can be registered in the parent device 100, and the block configuration of each child device is the same as described above. This completes the description of the configuration example of the handset 200 of the cordless telephone according to the first embodiment.

Next, the operation of the cordless telephone base unit 100 in the first embodiment to control the use of the carrier frequency in accordance with the registered capabilities of the handset 200 will be described. In the following description, the operation of controlling the carrier frequency when performing DECT wireless communication using the carrier frequencies and carrier numbers shown in Table 1 described above between the parent device 100 and the child device 200 will be described as an example. I do. 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 unit 100 in the first embodiment will be described with reference to FIG.

FIG. 3 is a flow chart showing an operation example of the base unit 100 of the cordless telephone according to the first embodiment.

When the parent device 100 is activated, the flow advances to step 301 .

At step 301, the control unit 120 of the parent device 100 reads all registered child device information at the start of operation. That is, carrier 9 correspondence information indicating whether or not each registered child device 200 is compatible with carrier number 9 communication is read from the child device information storage unit 103 . Flow then proceeds to step 302 .

At step 302, control unit 120 checks whether or not a child device 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 corresponding information of each registered child device 200 read from the child device information storage unit 103 is confirmed. If even one piece of carrier 9 correspondence information of registered child device 200 is "false" indicating that communication using the carrier frequency of carrier number 9 is not supported (step 302: Yes), proceed to step 304, If “false” is not included in the carrier 9 correspondence information of registered handset 200 (step 302 : No), the flow proceeds to step 303 .

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

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

In step 305, the master device 100 transmits a control signal for notifying the master device identification information, the carrier number for communication (0, 1, 2, 3, 4, 9), the operation mode (normal mode), etc. , activates the normal mode to wait for communication such as location registration and call connection from the slave. The control unit 120 transmits a control signal in one slot within a frame (a slot for transmitting the control signal is hereinafter referred to as a control slot), and receives data in a slot other than the control slot (hereinafter referred to as a standby slot). The radio section 101 and the frame processing section 102 are controlled so as to perform At this time, the 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 child device 200 is held 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. It also detects the level of interfering waves. Also, in step 305, a process of moving the control signal to avoid interference jamming of the control signal is performed. The control unit 120 controls the radio unit 101 and the frame processing unit 102 so as to periodically stop the transmission of the control signal and perform reception on the carrier frequency used for the transmission of the control signal in the control slot, Detects the level of jammers 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 and frame processing section 102 are operated 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 control signal of the selected carrier frequency in the selected slot. Control. 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, the control unit 120 sets the carrier numbers of the carrier frequencies that can be used as the carrier frequencies for the control signal to numbers corresponding to all carrier frequencies included in the first carrier frequency group, that is, 0, 1, Set to 2, 3, and 4. Flow then proceeds to step 311 .

In step 311, the master device 100 transmits a control signal for informing the master device identification information, the carrier number for communication (0, 1, 2, 3, 4), the operation mode (handset registration mode), etc. , activates the slave unit registration mode for waiting for a slave unit registration request from the slave unit. The control unit 120 transmits a control signal on the carrier frequency selected from among the carrier frequencies corresponding to the carrier numbers set in step 310, and receives the handset registration request from the handset 200 in the standby slot. The radio unit 101 and the frame processing unit 102 are controlled as follows. That is, when the control unit 120 is operating in the normal mode in step 305 and has transmitted the control signal at a carrier frequency belonging to the second carrier frequency group (carrier frequency corresponding to carrier number 9), the process proceeds to step 311. After the transition, each carrier frequency detected in the waiting slot is compared with the level of the interfering wave in the combination of each slot, and each carrier frequency corresponding to the carrier number set in step 310 (first carrier frequencies belonging to the carrier frequency group) and slots, and controls radio section 101 and frame processing section 102 so as to transmit control signals of the selected carrier frequencies in the selected slots. 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 . During operation in the normal mode of step 305, any one of carrier frequencies belonging to the first carrier frequency group (carrier frequencies corresponding to carrier numbers 0, 1, 2, 3, and 4) is used to transmit the control signal. is performed, the transmission slot and carrier frequency of the control signal are not changed, and only the content notified in the operation mode is changed to transmit the control signal.

At step 312, it is determined whether or not handset registration has been completed. The control unit 120 determines whether the child device registration sequence with the child device 200 has been correctly completed. If the child device registration has been completed (step 312: Yes), the process proceeds to step 314 to complete the child device registration. If not (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. 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 proceeds to step 301, registered The slave information is read (step 301), the capability of the slave is determined (step 302), and the carrier number that can be used in the control signal is set according to the capability of the slave (step 303 or step 304). , go to step 305 to return to normal mode operation.

At step 314, when the child device registration is completed, the parent device 100 stores the information of the child device for which the child device registration has been completed. Control unit 120 assigns a child device number to child device 200 in the child device registration sequence, and assigns a child device number to the child device identification information management area corresponding to the assigned child device number in child device information storage unit 103 in the child device registration sequence. The communication using the carrier frequency of carrier number 9 is not supported in the management area of the carrier 9 correspondence information corresponding to the child device number assigned by the child device information storage unit 103 by writing the child device identification information notified by the child device 200. Write "false" indicating that Flow then proceeds to step 301 . Then, in the same manner as described in steps 301, 302, 304, and 305 above, the handset information of all registered handset devices including the registration information of the newly registered handset device is read (step 301). , the ability of the child device is determined (step 302), and since the carrier 9 correspondence information of the newly registered child device is "false", the process proceeds to step 304, where the carrier frequency usable in the control signal is the first. While being restricted to only the carrier frequencies belonging to the carrier frequency group of , the process proceeds to step 305 to return to normal mode operation.

At step 320, the parent device 100 determines whether or not the child device information has been received. Control unit 120 receives slave unit information indicating whether or not the carrier frequency belonging to the second carrier frequency can be handled from slave unit 200 (whether or not communication is possible on the carrier frequency of carrier number 9). If the child device information has been received (step 320: Yes), the flow proceeds to step 321, and if the child device information has not been received (step 320: No), the flow proceeds to step 306. move on.

At step 321, the parent device 100 updates the child device information. Based on the child device identification code and the child device information notified from child device 200, control unit 120 stores carrier 9 corresponding information corresponding to the child device identification code notified from child device 200 in child device information storage unit 103. The slave device information notified from the slave device 200 is written in the management area. That is, when control unit 120 is notified from child device 200 that it can handle a carrier frequency belonging to the second carrier frequency, control unit 120 writes “true” to the management area of the carrier 9 correspondence information of the child device. , when it is notified that the carrier frequency belonging to the second carrier frequency cannot be handled, "false" is written in the management area of the carrier 9 correspondence information of the child device. 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 parent device 100 from the child device 200. FIG. Flow then proceeds to step 301 . When the handset information is updated and the flow advances to step 301, the newly updated handset information is read in the same manner as described in steps 301, 302, 303, 304, and 305 (step 301). ), the capability of the child device is determined (step 302), a carrier number that can be used in the control signal is set according to the capability of the child device (step 303 or step 304), and the process proceeds to step 305 where normal mode is selected. Return to action.

This completes the description of the operation of the cordless telephone base unit 100 according to the first embodiment.

Next, an example of the sequence of the handset registration operation of the base unit 100 of the cordless telephone according to the first embodiment 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:". Also, in each sequence diagram, the same number (sequence number) is attached to the sequence in the same operation.

First, a sequence will be described showing an operation example when the base unit 100 of the cordless telephone according to the first embodiment starts the handset registration mode.

FIG. 4 is a sequence diagram showing an operation example when the base unit 100 of the cordless telephone according to the first embodiment starts the handset registration mode.

The sequence in FIG. 4 shows the operation sequence from when base device 100 is on standby in the normal mode. Also, a sequence is shown when a child device that does not support communication on a carrier frequency belonging to the second carrier frequency group (carrier frequency of carrier number 9) is not registered in the parent device 100 .

As shown in FIG. 4, during operation in the normal mode, master device 100 selects one carrier selected from carrier frequencies belonging to the first carrier frequency group and the second carrier frequency group. Sending control signals.

During standby in the normal mode, base unit 100 uses a carrier frequency corresponding to a carrier number selected from six carrier numbers of carrier numbers 0, 1, 2, 3, 4, and 9 to generate a base unit identification code. A control signal for notifying is transmitted (sequence 401), and a control signal for notifying that communication is possible on carrier frequencies corresponding to six carrier numbers 0, 1, 2, 3, 4, and 9 is transmitted ( Sequence 402), and transmits a control signal notifying that it is operating in the normal mode (sequence 403). Note that the master identification code, the carrier number of the usable carrier frequency, and the control signal for notifying the operation mode are subsequently repeatedly transmitted while the normal mode continues (not shown).

When an operation to activate the slave unit registration mode is performed during standby in the normal mode (sequence 410), the slave unit registration mode is activated, and base unit 100 is selected from carrier frequencies belonging to the first carrier frequency group. A single carrier is selected to transmit the control signal. At this time, base unit 100 uses a carrier frequency corresponding to a carrier number selected from five carrier numbers of carrier numbers 0, 1, 2, 3, and 4 to transmit a control signal for notifying a base unit identification code. (sequence 411), transmit a control signal notifying that communication is possible on carrier frequencies corresponding to six carrier numbers 0, 1, 2, 3, 4, and 9 (sequence 412); It transmits a control signal notifying that it is operating in the machine registration mode (sequence 413). The master unit identification code, the carrier number of the usable carrier frequency, and the control signal for notifying the operation mode are subsequently repeatedly transmitted while the slave unit registration mode is continued (not shown).

This is the end of the description of the sequence showing an example of the operation when the base unit 100 of the cordless telephone according to the first embodiment starts up in the handset registration mode.

Next, a sequence showing an operation example of handset registration of the base unit 100 and the handset 200 of the cordless telephone according to the first embodiment will be described.

FIG. 5 is a sequence diagram showing an operation example of handset registration of the base unit 100 and the handset 200 of the cordless telephone according to the first embodiment.

The sequence in FIG. 5 shows the operation sequence from the state in which the child device registration mode is activated in the parent device 100 to the state in which the child device 200 has not yet been registered. is a sequence showing

As shown in FIG. 5, when operating in the handset registration mode, base unit 100 uses carrier frequencies corresponding to carrier numbers selected from five carrier numbers 0, 1, 2, 3, and 4. Then, it transmits a control signal that notifies the base unit identification code (sequence 411), and notifies that communication is possible on the carrier frequencies corresponding to the six carrier numbers 0, 1, 2, 3, 4, and 9. (sequence 412), and a control signal notifying that it is operating in the slave unit registration mode (sequence 413).

On the other hand, when the slave unit registration mode is activated in slave unit 200 (sequence 500), control unit 220 controls radio unit 201 and frame processing unit 202 so as to perform continuous reception while sequentially changing the reception frequency. . At this time, if the slave device is not compatible with communication at the carrier frequencies belonging to the second carrier frequency group, the reception frequency for searching the base device 100 is selected from among the carrier frequencies belonging to the first carrier frequency group. If the slave device is selected and is compatible with communication on carrier frequencies belonging to the second carrier frequency group, the reception frequencies for searching the base device 100 are the first carrier frequency group and the second carrier frequency. It is selected among the carrier frequencies belonging to the group. Since base unit 100 transmits a control signal using a carrier frequency selected from among carrier frequencies belonging to the first carrier frequency group, whether or not handset 200 supports carrier frequencies belonging to the second carrier frequency group is Regardless, slave device 200 can receive the control signal transmitted from master device 100 .

When child device 200 receives the control signal announcing the parent device identification code and the available carrier, and receives the notification that the operation mode is the child device registration mode, the time with parent device 100 is established. Synchronization of division multiplex communication is established, a carrier frequency that can be used by itself is selected from the carrier frequencies notified by the received available carriers, and a radio link is established for radio communication with base unit 100. to start. Since base device 100 notifies all carrier frequencies belonging to the first carrier frequency group and the second carrier frequency group as usable carriers, the radio signal for performing radio communication with base device 100 is selected from among the carrier frequencies belonging to the first carrier frequency group if the slave device does not support communication on the carrier frequencies belonging to the second carrier frequency group, and is selected from the carrier frequencies belonging to the second carrier frequency group. is selected from carrier frequencies belonging to the first carrier frequency group and the second carrier frequency group. Then, when the activation of the wireless link between base device 100 and child device 200 is completed, child device 200 transmits a child device registration request to base device 100 (sequence 501).

Upon receiving the child device registration request, the parent device 100 activates the authentication sequence for child device registration, assigns a child device number, and transmits and receives authentication calculation random numbers for mutual authentication, authentication calculation results, etc. ( sequence 502).

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 slave unit 200 (sequence 503), and assigned to slave unit 200 in the slave unit registration sequence. The child device identification information notified by the child device 200 in the child device registration sequence is written in the child device identification information management area of the child device information storage unit 103 corresponding to the child device number, and the child device information storage unit 103 is assigned. Write "false", which means that carrier 9 is not supported, in the management area of the carrier 9 support information corresponding to the handset number. Then, master device 100 releases the wireless link with slave device 200 and terminates the slave device registration mode. On the other hand, when slave device 200 receives a message of slave device registration acceptance notifying that slave device registration has been accepted, control unit 220 writes the master device identification information of master device 100 to master device information storage unit 203, It releases the radio link and controls the radio section 201 and the frame processing section 202 to receive the control signal of the master device 100 .

When the slave unit registration mode ends, master unit 100 activates the normal mode. selects one carrier selected from and transmits a control signal. 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 a control signal for notifying a base unit identification code ( Sequence 511), transmits a control signal notifying that communication is possible on carrier frequencies corresponding to six carrier numbers 0, 1, 2, 3, 4, and 9 (Sequence 512), and operates in normal mode. A control signal is transmitted to notify that it is in progress (sequence 513). The master unit identification code, the carrier number of the usable carrier frequency, and the control signal for notifying the operation mode are subsequently repeatedly transmitted while the slave unit registration mode is continued (not shown).

This completes the description of the sequence showing the operation example of handset registration of the base unit 100 and the handset 200 of the cordless telephone according to the first embodiment.

Next, a sequence will be described that shows an operation example when the base unit 100 of the cordless telephone according to the first embodiment is notified from the handset 200 that it supports carrier number 9. FIG.

FIG. 6 is a sequence diagram showing an operation example when carrier number 9 support is notified to the base unit 100 of the cordless telephone according to the first embodiment. Note that the child device 200 in FIG. 6 is a child device that supports communication at carrier frequencies belonging to the second carrier frequency group.

The sequence of FIG. 6 shows the operation sequence from the state where child device registration from child device 200 is completed, and is a sequence showing an example of operation following the sequence of FIG. 5 described above.

As shown in FIG. 6, master unit 100, which has completed slave unit registration and returned to the normal mode, has a carrier frequency corresponding to a carrier number selected from five carrier numbers 0, 1, 2, 3, and 4. is used to transmit a control signal that notifies the parent unit identification code (sequence 511), and communication is possible on carrier frequencies corresponding to the six carrier numbers 0, 1, 2, 3, 4, and 9. (sequence 512), and a control signal notifying that it is operating in the normal mode (sequence 513).

On the other hand, when the slave unit registration mode is completed, slave unit 200 activates a wireless link for performing location registration. is selected to activate a wireless link for wireless communication with the master device 100 . Since master device 100 notifies all carrier frequencies belonging to the first carrier frequency group and the second carrier frequency group as usable carriers, the first carrier frequency group and the second carrier frequency group A carrier frequency used in wireless communication for location registration is selected from carrier frequencies belonging to the frequency group. Then, when the activation of the radio link between base device 100 and child device 200 is completed, child device 200 transmits a location registration request to base device 100 (sequence 601). Note that the mobile device 200 corresponding to the carrier frequencies belonging to the second carrier frequency group supports communication using the carrier frequencies belonging to the second carrier frequency group in this location registration request message (FIG. 6). will be described as "supporting carrier 9"). For example, in the communication protocol of the DECT method, an information element (IWU-TO-IWU) that conveys a message between IWUs in a location registration request message (LOCATE-REQEST) is used to select a carrier frequency belonging to the second carrier frequency group. It notifies that it is compatible (that it is compatible with communication on the carrier frequency of carrier number 9).

Upon receiving the location registration request, master device 100 activates the authentication sequence for location registration, transmits and receives authentication calculation random numbers for authentication, authentication calculation results, etc. (sequence 602), Confirm that it is a location registration request.

When the location registration authentication sequence ends correctly, base device 100 transmits a location registration acceptance message to child device 200 (sequence 603) to notify that the location registration has been accepted, and the carrier belonging to the second carrier frequency group. According to the notification that the communication using the frequency is supported, based on the child device identification information received in the location registration sequence, " true”. Then, master device 100 releases the radio link with slave device 200 . On the other hand, when slave device 200 receives the message of acceptance of location registration notifying that the location registration has been accepted, control unit 220 releases the wireless link and instructs radio unit 200 to receive the control signal of master device 100 . , controls the frame processing unit 202 .

When carrier 9 correspondence information in child device information storage unit 103 is updated, master device 100 has not yet started communication with the registered child device on the carrier frequency of the second carrier frequency group (carrier frequency of carrier number 9). Check if a compatible child device is included, and set a carrier frequency that can be used to transmit control signals. In the example of FIG. 7, the slave unit that does not support communication on the carrier frequencies of the second carrier frequency group (carrier frequency of carrier number 9) is not included, and the first carrier frequency group and the second carrier frequency It shows an operation set to select one carrier selected from the carrier frequencies belonging to the group and transmit the control signal. Then, base unit 100 uses a carrier frequency corresponding to a carrier number selected from six carrier numbers of carrier numbers 0, 1, 2, 3, 4, and 9, and uses a control signal to notify the base unit identification code. (sequence 611), and transmits a control signal notifying that communication is possible on carrier frequencies corresponding to the six carrier numbers 0, 1, 2, 3, 4, and 9 (sequence 612), It transmits a control signal notifying that it is operating in normal mode (sequence 613). The master unit identification code, the carrier number of the usable carrier frequency, and the control signal for notifying the operation mode are subsequently repeatedly transmitted while the slave unit registration mode is continued (not shown).

This completes the description of the sequence showing the operation example when the base unit 100 of the cordless telephone according to the first embodiment is notified by the handset 200 that it supports carrier number 9. FIG.

Next, a sequence will be described that shows an operation example when the handset 200 that does not support communication on the carrier frequency corresponding to the carrier number 9 is registered in the base unit 100 of the cordless telephone according to the first embodiment.

FIG. 7 is a sequence diagram showing an operation example when a handset that does not support communication on the carrier frequency corresponding to carrier number 9 is registered in the base unit 100 of the cordless telephone according to the first embodiment.

The sequence in FIG. 7 shows the operation sequence from the state where handset registration with the handset 200 not compatible with carrier number 9 is completed, and is a sequence showing an operation example following the sequence in FIG. 5 described above.

As shown in FIG. 7, master unit 100, which has completed slave unit registration and returned to the normal mode, has a carrier frequency corresponding to a carrier number selected from five carrier numbers 0, 1, 2, 3, and 4. is used to transmit a control signal that notifies the parent unit identification code (sequence 511), and communication is possible on carrier frequencies corresponding to the six carrier numbers 0, 1, 2, 3, 4, and 9. (sequence 512), and a control signal notifying that it is operating in the normal mode (sequence 513).

On the other hand, when the slave unit registration mode is completed, slave unit 200 activates a wireless link for performing location registration. It selects a carrier frequency that it can use from among the carrier frequencies notified by the received available carriers, and activates a wireless link for performing wireless communication with base unit 100 . Master device 100 notifies all carrier frequencies belonging to the first carrier frequency group and second carrier frequency group as usable carriers, but slave device 200 belongs to the second carrier frequency group. Since communication using carrier frequencies is not supported, slave device 200 activates a wireless link with base device 100 using a carrier frequency selected from carrier frequencies belonging to the first carrier frequency group. Then, when the activation of the wireless link between base device 100 and child device 200 is completed, child device 200 transmits a location registration request to base device 100 (sequence 701). At this time, the fact that the communication of the carrier frequencies belonging to the second carrier frequency group is not supported (that the communication of the carrier frequency of carrier number 9 is not supported) is not notified.

Upon receiving the location registration request, base unit 100 activates the authentication sequence for location registration, transmits and receives authentication calculation random numbers for authentication, authentication calculation results, etc. (sequence 702), When confirming that it is a location registration request, it transmits a slave unit registration acceptance message notifying that the slave unit registration has been accepted to slave unit 200 (sequence 703), and carries carrier numbers 0, 1, 2, 3, and 4. Using the carrier frequency corresponding to the carrier number selected from the five carrier numbers of , a control signal for notifying the base unit identification code is transmitted (sequence 711), and 0, 1, 2, 3, 4, 9 A control signal is transmitted to notify that communication is possible on the carrier frequencies corresponding to the six carrier numbers (sequence 712), and a control signal is transmitted to notify that it is operating in the normal mode (sequence 713). . The master unit identification code, the carrier number of the usable carrier frequency, and the control signal for notifying the operation mode are subsequently repeatedly transmitted while the slave unit registration mode is continued (not shown).

Further, when slave device 200 receives a message of acceptance of location registration notifying that location registration has been accepted, control unit 220 releases the wireless link and instructs wireless unit 200 to receive the control signal of master device 100 . , controls the frame processing unit 202 .

In addition, as an operation example when the child device 200 that does not support communication using the carrier frequency corresponding to the carrier number 9 is registered, the child device 200 supports communication of the carrier frequency of the carrier number 9 ( communication at a carrier frequency belonging to the second carrier frequency group) is not notified, and base device 100 uses the carrier frequency of carrier number 9 (the second carrier frequency group) as the carrier frequency of the control signal. However, the handset 200 does not support communication on the carrier frequency of carrier number 9 (it does not support communication on the carrier frequency belonging to the second carrier frequency group). not supported) to the base unit 100 so that the base unit 100 does not use the carrier frequency of carrier number 9 (the carrier frequency belonging to the second carrier frequency group) as the carrier frequency of the control signal. . In this case, master device 100 is notified by slave device 200 that slave device 200 does not support communication on the carrier frequency of carrier number 9 (not compatible with communication on carrier frequencies belonging to the second carrier frequency group). ) is notified, "false" is written in the management area of the carrier 9 correspondence information of the child device information storage unit 103 corresponding to the child device, the carrier 9 correspondence information of the registered child device is checked, and "false" is written. '', the carrier frequency of the control signal is selected from among the carrier frequencies belonging to the first carrier frequency group.

This completes the description of the sequence showing the operation example when the handset 200 that does not support communication using the carrier frequency corresponding to carrier number 9 is registered in the base unit 100 of the cordless telephone according to the first embodiment. .

Although the present invention has been described with reference to examples of preferred embodiments thereof, it should be readily understood by 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, an example in which the wireless communication device of the present invention is incorporated into a home cordless telephone has been described, but the wireless communication device of the present invention can be incorporated into a home automation network to which sensors and cameras are connected. is also possible. 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 wireless communication device according to the present invention is useful as a wireless communication device for communication equipment such as a cordless telephone that performs wireless communication by selecting one carrier frequency from a plurality of carrier frequencies.

100 base unit 101 radio unit 102 frame processing unit 103 child unit information storage unit 105 display unit 106 notification unit 108 operation unit 110 line control unit 120 control unit 200 child unit 201 radio unit 202 frame processing unit 203 base unit information storage unit 205 display Unit 206 Notification unit 208 Operation unit 220 Control unit

Claims (2)

A wireless communication device operating as the control station in a wireless communication system comprising a control station and a dependent station,
A first carrier frequency group composed of at least one carrier frequency, or a carrier frequency belonging to a second carrier frequency group composed of at least one carrier frequency excluding carrier frequencies belonging to the first carrier frequency group wirelessly communicate with the dependent station using
Broadcast a control signal containing information necessary for communication,
broadcasting the control signal including information indicating that registration of the dependent station is being accepted using carrier frequencies belonging to the first carrier frequency group;
exchanging information with the dependent station by wireless communication and registering the dependent station;
When notified by the dependent station that the carrier frequencies belonging to the second carrier frequency group can be used, the carrier frequencies belonging to the first carrier frequency group or the second carrier frequency group are used. Use to broadcast a control signal containing information necessary for the communication,
Carriers belonging to the first carrier frequency group or the second carrier frequency group when all of the registered dependent stations can use the carrier frequencies included in the second carrier frequency group Broadcast a control signal containing information necessary for the communication using a frequency,
When at least one of the registered dependent stations is unable to use the carrier frequencies included in the second carrier frequency group, the carrier frequencies belonging to the first carrier frequency group are used for the communication. broadcasting control signals containing information;
wireless communication device. A wireless communication device operating as the control station in a wireless communication system comprising a control station and a dependent station,
A first carrier frequency group composed of at least one carrier frequency, or a carrier frequency belonging to a second carrier frequency group composed of at least one carrier frequency excluding carrier frequencies belonging to the first carrier frequency group wirelessly communicate with the dependent station using
Broadcast a control signal containing information necessary for communication,
broadcasting the control signal including information indicating that registration of the dependent station is being accepted using carrier frequencies belonging to the first carrier frequency group;
exchanging information with the dependent station by wireless communication and registering the dependent station;
When notified by the dependent station that the carrier frequencies belonging to the second carrier frequency group can be used, the carrier frequencies belonging to the first carrier frequency group or the second carrier frequency group are used. Use to broadcast a control signal containing information necessary for the communication,
broadcasting a control signal containing information indicating carrier frequencies usable in communication with the dependent station;
wireless communication with the dependent station using a carrier frequency selected by the dependent station from the carrier frequencies notified by the control signal;
Broadcasting the control signal including information indicating that all carrier frequencies belonging to the first carrier frequency group and the second carrier frequency group can be used;
wireless communication device.

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