JP2007006293A - Radio communication device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of reducing the power consumption of a slave station which receives pieces of control information from two control stations. <P>SOLUTION: A doorphone master unit as a sub-control station transmits the incoming presence/absence information of the doorphone master unit with a TDMA frame in timing to the transmission of incoming presence/absence information that a telephone master unit as a main control station periodically transmits. A telephone doorphone cooperative slave unit capable of being synchronized with the telephone master unit and doorphone master unit and connected with both the units for telephone calling receives the pieces of control information from both the master units with frames by which the pieces of incoming presence/absence information are transmitted, and performs intermittent reception control to stop control information reception until next incoming presence/absence information is transmitted. By this constitution, an intermittent period equal to the standby state of one control station can be secured. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wireless communication apparatus in which a control station and a slave station communicate by time division multiplexing.

  2. Description of the Related Art Conventionally, wireless communication systems having a plurality of slave stations with respect to one control station that performs communication by TDMA (Time Division Multiplexing) such as a cordless telephone apparatus have become widespread in ordinary households. As shown in FIG. 7, if the cordless telephone master device 600a of the cordless telephone device 600 is a control station and a plurality of cordless telephone slave devices 600b are slave stations, the cordless telephone master device 600a is arranged in the living room on the first floor. The cordless telephone cordless handset 600b is arranged in each room such as a child's room or a bedroom, so that it is not necessary to go to the cordless telephone master phone 600a every time an incoming call is received. Only one cordless telephone cordless handset 600b is shown).

  In addition, a door phone device 601 with a camera may be installed in a general home. The door phone device 601 with a camera includes a camera, a microphone, a speaker, and a door button 601a provided with a ringing button for sounding a chime. The provided door phone master 601b is installed in a living room or the like.

  Recently, some camera-equipped doorphone devices 601 include a doorphone master unit 601b as a control station and a doorphone monitor slave unit 601c as a slave station. When the visitor presses the ringing button, the doorphone monitor slave unit is wirelessly connected from the doorphone master unit 601b, and the visitor's image captured by the camera is transmitted to the doorphone monitor slave unit. Calls with existing visitors are possible. As described above, a plurality of wireless devices such as the cordless telephone device 600 and the door phone device 601 with camera have been introduced in general homes.

  However, if there are dedicated slave units in each of the plurality of wireless devices, it is difficult to manage these slave units. Therefore, it is desired that the cordless telephone device 600 and the camera-equipped door phone device 601 be shared.

  As shown in the TDMA time slot configuration of FIG. 8, the shared handset that can receive and respond to incoming calls from the cordless telephone base unit 600a and the doorphone base unit 601b is connected to the cordless telephone base unit 600a and the doorphone. It is necessary to receive control information of each parent device in synchronization with the parent device 601b. In the example of FIG. 8, the door phone base unit 601b and the shared handset receive control information transmitted from the cordless telephone base unit 600a in the slot 1 and are synchronized. Furthermore, the common handset has received the control information transmitted by the door phone base unit 601b. With this slot configuration, the shared handset receives control information from the cordless telephone base unit 600a and the door phone base unit 601b, and is in a state where it can receive calls from either.

  In addition, since the cordless phone's handset is battery-powered, it receives control information at certain intervals without receiving all the control information sent by the base phone so that it consumes less power during standby. Intermittent reception processing is performed. For example, it is assumed that the cordless telephone apparatus 600a transmits a control signal every frame, but transmits a control signal including incoming / outgoing presence information once every 16 frames at the timing of the frame number 16n. During intermittent reception, the telephone handset 600b receives the control channel at the timing of the frame number 16n (hereinafter, n is a natural number) shared with the parent device in order to receive the incoming / outgoing information. At other frame timings during standby, reception is stopped and an intermittent reception state is entered. When the TDMA method of 10 ms per frame is used, the time interval at which the control signal including incoming / outgoing presence / absence information is transmitted is 160 ms, and the slave unit can detect an incoming call once every 160 ms. Furthermore, if the base unit transmits a control signal including incoming / outgoing presence information over four frames of frame numbers 16n, 16 (n + 1), 16 (n + 2), and 16 (n + 3), the slave unit only needs to be able to receive any of these. The intermittent reception cycle can be set to 640 ms.

  However, when considering sharing a cordless phone and a camera-equipped door phone device, the timing when the telephone master unit sends a control signal including incoming / outgoing information and the door phone parent device sends a control signal containing incoming / outgoing information. If the timings are independent and different frame timings, in order to receive both incoming / outgoing information without missing in the shared slave unit, it is necessary to shorten the intermittent reception in accordance with the respective incoming / outgoing information transmission timing. (FIG. 8). In this case, the intermittent reception control becomes complicated, and the power saving performance at the time of waiting for the slave unit may be deteriorated in consideration of the increase in power consumption in the reception preparation period before shifting to the reception state.

  In addition, in the paging area composed of a plurality of base stations, the plurality of base stations synchronize the slot timing of the control channel and periodically or intermittently transmit the information on the superframe of the control channel. In the incoming / outgoing call method using superframe synchronization in communication with a station, each base station in an adjacent service area transmits superframes sequentially shifted by one slot timing, and is received by the mobile terminal or relay station. A technique is known in which power consumption is reduced by waiting for an incoming call while intermittently receiving so that the control channels of the base stations can be received simultaneously (Patent Document 1).

Also, in a digital cordless telephone apparatus that enables communication between a plurality of master units and different slave units set with different system call codes, transmission is performed from one master unit serving as a reference among the plurality of master units. Control signal to be received by the other parent device, and the control signal is transmitted from the other parent device in synchronization with the reception timing of this control signal, the control during the standby operation of the child device, A technique that can be easily performed with low power consumption is known (Patent Document 2).
JP-A-11-196447 JP-A-8-251661

  The problem to be solved is that, in the slave station of the wireless communication device that receives control information from the control station and the sub-control station, the power consumption during standby is the increase in the number of receptions compared to the case of synchronizing with only one control station. It is a point that it increases more.

  The present invention comprises a master control station and one or more sub-control stations synchronized with the master control station, and a slave station synchronized with the master control station and the one or more sub-control stations, Is a wireless communication system that receives control information of the main control station and the one or more sub-control stations, wherein the sub-control station receives incoming information that is a type of control information transmitted by the main control station. Has means for detecting the timing of transmission, and has means for setting control information transmission timing for notifying the slave station of the occurrence of an incoming event at its own station that occurs at a timing independent of the master control station, The slave station has intermittent reception processing means for stopping reception of control information for a certain period of time during standby, and receives any incoming / outgoing information of the main control station and the sub control station within a unit frame time, and after receiving If there is no incoming call, next incoming / outgoing information is sent. And main feature to stop receiving over a plurality of frames until.

  The present invention is a slave station of a radio communication apparatus that receives control information from a main control station and a sub control station, so that the sub control station can receive control information from the main control station and the sub control station within a unit frame time. Transmits control information in synchronization with the timing of the master control station, the slave station receives control information in frames where the master control station and sub-control station transmit incoming / outgoing information, and stops receiving in other frames Thus, the reception stop period during intermittent reception can be maximized.

  In this way, it is possible to minimize the increase in power consumption during standby of the shared slave unit, and it is possible to provide a wireless communication device that is highly convenient and has low power consumption.

  The first invention of the present application includes a master control station and one or more sub-control stations synchronized with the master control station, and a slave station synchronized with the master control station and the one or more sub-control stations, In a wireless communication system in which the slave station receives control information of the master control station and one or more sub-control stations, the sub-control station transmits incoming information that is a type of control information transmitted by the master control station. And a means for setting control information transmission timing for notifying the slave station of the occurrence of an incoming event at the local station that occurs at a timing independent of the master control station. Is an intermittent reception process comprising a first period during which both control information from the main control station and control information from the sub control station can be received within a unit frame time, and a second period during which reception is stopped over a plurality of frames No discontinuous reception processing means for performing A communication system, has the advantage of reducing the power consumption during standby slave stations receive the synchronization and control information to a plurality of control stations.

  In the second invention, in the sub control station, a slot adjacent to the control channel slot transmitted by the main control station is selected, in particular, the control channel slot transmitted by the sub control station. There is an advantage that the period can be shortened and the power consumption during standby of the slave station can be further reduced.

  Further, in the third aspect of the present invention, even when the slave station starts communication with one control station, the control information of other synchronized control stations is intermittently received so that the slave station is communicating. The power consumption can be reduced.

  According to a fourth aspect of the present invention, when the incoming control information is included in the control information from the main control station or the main control station received in the first period, switching from intermittent reception to continuous reception is performed. Thus, it is possible to reliably receive incoming call information.

  According to a fifth aspect of the present invention, there is provided a wireless communication system comprising a plurality of control stations and a slave station that receives control information including incoming information transmitted from the control station at a predetermined timing and starts communication with the control station. The slave station has a wireless unit for communicating with the control station, a first mode that prepares reception of incoming information, activates the wireless unit, and performs analysis processing on the received data. A second mode that operates with power consumption, and the time from reception of incoming information to reception of the next incoming information is longer than the time for preparation for reception in the first mode; A control unit that performs control so as to shift to the control station, and the control station transmits a time from transmission of control information including incoming information transmitted by another control station to transmission of control information including incoming information transmitted by the local station. Shorter than the reception preparation time of the slave station It is characterized by having a control unit that operates to determine the transmission timing of control information including incoming information, and the incoming information transmitted by each control station is less than the time required for the slave station to prepare for reception. By transmitting at short intervals, the slave station can continuously receive in the first mode without switching to the second mode after receiving the incoming information of one control station. The reception preparation time does not become the maximum value every time the incoming call information is received, and the first mode and the first mode including the maximum reception preparation time each time the slave station receives the incoming call information from all the control stations. Compared with the case where the second mode is repeatedly operated, the time for operating in the second mode, which consumes less power for the entire waiting time, becomes longer, and the current consumption during standby can be reduced.

(Embodiment 1)
Hereinafter, Embodiment 1 of the present invention will be described with reference to FIGS.

  FIG. 1 is a configuration diagram of a radio communication system according to Embodiment 1 of the present invention.

  As shown in FIG. 1, a wireless communication system 101 according to an embodiment of the present invention includes a door phone device 102 and a cordless telephone device 103. The door phone device 102 includes an entrance handset 102a and a door phone base unit 102b. The cordless telephone device 103 is also a cordless telephone master unit 103a, a cordless telephone cordless handset, and a door phone cordless handset, and can be used to respond to incoming calls from either the doorphone master unit 102b or the cordless telephone master unit 103a. Machine 103b. In FIG. 1, only one telephone doorphone cooperative handset 103 b is illustrated, but a plurality of telephone doorphone cooperation handsets 103 b may be provided. In the wireless communication system 101 according to the present embodiment, the cordless telephone base unit 103a is a main control station, the doorphone base unit 102b is a sub-control station, and the telephone doorphone cooperative handset 103b is a slave station, and performs wireless communication by the TDMA method. The intercom base unit 102b receives the control channel of the cordless telephone base unit 103a and synchronizes with the frame timing. Therefore, the telephone intercom linking slave unit 103b searches for either the cordless telephone master unit 103a or the doorphone master unit 102b, and can synchronize with either master unit at the frame timing and receive both control channels. be able to.

  FIG. 2 is a block diagram of the telephone door phone cooperation slave device 103b according to the first embodiment of the present invention. In the telephone door phone cooperative slave unit 103b, 201 is a wireless reception unit that processes a reception signal received from an antenna, and 202 is a wireless transmission unit that transmits transmission data wirelessly. Reference numeral 203 denotes a reception control channel control unit that receives and processes control channel data received by the wireless reception unit 201, and 204 indicates from which master unit the reception control channel receives the control channel, and the slot and reception frequency. It is a reception control channel management unit to manage. Reference numeral 205 denotes a control unit that controls the voice and data communication outgoing and incoming calls when the doorphone base unit 102b responds to an incoming call from the cordless telephone base unit 103a. Reference numeral 207 denotes an audio processing unit that converts analog audio and wireless transmission / reception data, and 208 denotes a speaker / microphone unit that reproduces and acquires analog audio.

  The telephone intercom linking handset 103b is a wireless receiving unit 201, a reception control channel control unit 203, and a reception control channel management unit 204, which determines which base unit receives the control channel and controls for reducing power consumption. It performs reception stop processing for a certain period of time.

  In Embodiment 1, after receiving the control information, the intermittent reception processing means transmits the information on the reception of the control information from the radio reception unit 201 to the reception control channel control unit 203, and the reception control channel control unit 203 uses the information. The reception setting of the control channel of the wireless reception unit 201 is canceled, and the time for stopping the reception of the control channel is set, thereby realizing the intermittent reception process for stopping the reception of control information for a certain time. Further, while receiving is stopped, the power consumption of peripheral devices such as the audio processing unit 207 and the speaker / microphone 208 is turned off to reduce power consumption. Also, at the next control information reception timing, the reception stop state is canceled and the reception ready state is released so that the period required for the peripheral device power-on and radio frequency setting is ensured. The reception is stopped again.

  FIG. 3 is a block diagram of door phone master unit 102b according to Embodiment 1 of the present invention. In the intercom base phone 102b, 301 is a wireless reception unit that processes a reception signal received from an antenna, and 302 is a wireless transmission unit 302 that transmits transmission data wirelessly. Reference numeral 303 denotes a control channel timing detection unit that processes the control channel data received from the telephone base unit by the radio reception unit 301 and detects the frame timing of the control channel. 304 is a control that determines transmission control channel information according to the frame timing. A channel transmission control unit. A control channel management unit 305 analyzes reception control channel information and creates transmission control channel information. Reference numeral 306 denotes a control unit that controls voice and image data communication outgoing / incoming calls when responding to an incoming call from the cordless telephone base unit 103a. Reference numeral 307 denotes an entrance slave unit interface control unit that performs interface control with the entrance slave unit 102a.

  FIG. 4 is an explanatory diagram of control channel transmission / reception slots according to Embodiment 1 of the present invention. Hereinafter, the operations of the door phone master unit 102b and the telephone door phone cooperative slave unit 103b will be described with reference to FIG. The cordless telephone base unit 103a transmits a control channel in the slot 1 (S400), and the doorphone base unit 102b receives the control channel of the cordless telephone base unit 103a in the slot 1 (S401). The control information transmitted on the control channel by the intercom master unit 102b and the telephone intercom linkage slave unit 103b includes incoming information for notifying the slave station of the occurrence of an incoming event.

  The control channel timing detection unit 303 acquires the frame number information of the telephone base unit from the received control information, and grasps the timing at which the telephone base unit sends the incoming / outgoing presence / absence information as control information when an incoming call occurs in the telephone base unit. . Also, by receiving control information from the telephone base unit, time slot synchronization and frame synchronization are established with the telephone base unit, and then its own control channel is transmitted in slot 5 (S402). The control channel transmission control unit 304 creates transmission control information, similarly transmits the incoming / outgoing presence / absence information in the frame number to which the telephone master transmits the incoming / outgoing presence / absence information, and transmits the terminal number and type in the other frames. The telephone doorphone linkage slave unit 103b receives the control channel of both the cordless phone master unit 103a and the doorphone master unit 102b, and can receive both control information.

  In addition, the waiting telephone intercom cooperation handset 103b performs intermittent reception. That is, the reception processing period within the unit frame time: during Tb, the control information from the cordless telephone base unit 103a (main control station) and the control information from the doorphone base unit 102b (sub control station) are received for a time width that can be received. In the subsequent sleep period Tc, reception is stopped over a plurality of frames. In the reception preparation period: Ta before the reception processing period, processing for switching the CPU clock, frequency setting for the PLL circuit, and synchronization processing are performed.

  By performing intermittent reception in this way, both control information is received in the frame number in which incoming / outgoing presence / absence information is transmitted from the telephone base unit or door phone base unit, and reception is performed according to its own intermittent reception cycle in subsequent frames. In addition to stopping, the peripheral device power is turned off, the CPU clock is lowered, or CPU sleep is performed to minimize power consumption.

  In the example of FIG. 4, since the presence / absence information from the telephone base unit and the incoming / outgoing information from the doorphone base unit are received by different slots in the same frame in the reception processing period: Tb, An incoming call can be detected by performing a reception operation only in the frame period, and reception can be stopped in other frames.

  In addition, the CPU clock is switched in the reception preparation period: Ta before the reception processing period, the frequency setting to the PLL circuit and the synchronization processing are performed, and the control information from the cordless telephone base unit 103a and the intercom base unit are obtained by this one reception preparation. Since both of the control information from 102b are received, preparation for receiving both control information can be completed in one reception preparation period, and the time required for reception preparation can be shortened, so that the CPU sleep period is increased accordingly. Power consumption can be suppressed.

  Further, in the example of FIG. 4, a plurality of control information can be received in half the TDMA frame time, and the reception preparation time: Ta and the reception data processing time for powering on the peripheral device and setting the radio frequency are added. Reception other than the time can be stopped until the next control information reception frame. In FIG. 4, the standby state in which the CPU clock is not lowered or the CPU sleep is not performed between the reception slots is also included in the reception preparation period.

  Also, as shown in FIG. 4, when the control information slots transmitted by the control station are separated by a plurality of slots, the telephone intercom-linked handset 103b receives control information from one control station, and after data processing, from the next control station Therefore, there is an advantage that the reception buffer can be shared.

  Next, the operation when an incoming event occurs will be described. FIG. 5 is a slot explanatory diagram of control channel transmission / reception when an incoming call occurs in Embodiment 1 of the present invention. As shown in FIG. 5, the door phone is pressed between the frame numbers 16 (n + 3) to 16 (n + 4). Assume that an incoming call occurs. The entrance slave unit interface control unit 307 detects an incoming call, and the control unit 306 starts notification of the incoming call to the subordinate telephone doorphone linkage slave unit. The control channel management unit 305 creates incoming call information and notifies it to the control channel transmission control unit 304. The control channel transmission control unit 304 waits until the next incoming / outgoing presence / absence information is transmitted = frame number 16 (n + 4), and transmits incoming / outgoing presence / absence information (with incoming call) as control information at frame number 16 (n + 4). At this time, the control information transmitted from the telephone base unit is incoming / outgoing presence information (no incoming call).

  The telephone intercom cooperation handset stops receiving up to frame number 16 (n + 4) -1, receives control information from the telephone base unit and the doorphone base unit at frame number 16 (n + 4), and receives the control information from the doorphone base unit. In order to receive incoming call information, the state transitions from the standby state to the incoming state and switches from intermittent reception to continuous reception. In this way, the telephone intercom cooperation handset can detect incoming calls from both the telephone base phone or the doorphone base unit even during intermittent reception.

  FIG. 6 is a slot explanatory diagram of control channel transmission / reception when an incoming call occurs in Embodiment 1 of the present invention. If the control information transmitted from the telephone base unit is incoming / outgoing presence information (no incoming call), FIG. As described above, it is possible to switch to continuous reception only for reception of control information from the doorphone master unit, stop reception of control information transmitted from the telephone master unit, and maintain intermittent reception.

  Further, when an incoming call is received from the outside line to the telephone base unit, incoming / outgoing information (with incoming call) is transmitted by the control information transmitted from the telephone base unit. Also in this case, the telephone intercom cooperation handset transitions from the standby state to the incoming state and switches from intermittent reception to continuous reception.

  Next, a second operation example of the slave station will be described. The doorphone master unit, which is the sub-control station that receives the control channel of the main phone base station and starts transmission of the control channel in synchronization with the phone base unit, selects a slot adjacent to the phone base unit as the control channel slot. To do. The transmission timing of the incoming / outgoing presence information is the same as that of the doorphone master unit according to claim 1. In order to receive incoming / outgoing information from the telephone master unit and the door phone master unit, the slave unit of the telephone doorphone linked slave unit receives only two consecutive slots, and then immediately stops receiving if there is no incoming call. You can start. In this way, the telephone intercom-linked handset can make the reception stop section the longest, and a further reduction in power consumption during standby is realized.

  Next, a third operation example of the slave station will be described. After the door phone incoming call detection in the above example is detected, the slave phone intercom slave unit receives the door phone control channel continuously every frame, but the telephone control channel is received only when the incoming / outgoing information is transmitted. Do. This is shown in FIG. The door-to-phone intercom slave unit that has received the control information of both the telephone base unit and the doorphone base unit at frame number 16 (n + 4) and has detected the incoming doorphone starts ringing the incoming doorphone, and the next frame number 16 (n + 4) +1 Thereafter, reception of the intercom control channel is continuously performed every frame without stopping. On the other hand, since the information on the telephone control channel is not related to the ringing of the doorphone, the reception of the telephone control channel is stopped until frame number 16 (n + 4) +1 or later until the frame in which incoming / outgoing presence / absence information is transmitted on the next telephone control channel. It is possible. The reverse is also true when an incoming call does not enter the doorphone and an incoming call occurs. In this way, further reduction in power consumption of the telephone intercom-linked slave unit that is in communication only with one of the master units is realized.

  Next, a fourth operation example of the slave station and the control station will be described. In the telephone intercom cooperation handset which is a slave station, switching from the second mode which operates with low power consumption to the first mode in which reception processing and reception data analysis processing are possible is performed for the reception slot for reception preparation processing. Assume that this is done 6 slots before. Assume that two slots are required for preparation for switching to the second mode. When the incoming / outgoing presence / absence information transmission timing between the telephone master unit and the doorphone master unit, which is the control station, is 8 slots or more away, the telephone intercom cooperation slave unit receives the control information from one control station and then temporarily Switch to the mode and switch to the first mode again to receive control information from the other control station. When such an operation is performed, 6 slots + 6 slots = 12 slots are allocated to the reception preparation period: Ta for receiving both pieces of control information. Here, when the sub control station sets the transmission timing of the incoming / outgoing presence / absence information of its own station so that the timing difference of the incoming / outgoing presence / absence information transmission between the control stations is within 6 slots, From the comparison of the time until receiving the next control information and the time required for the reception preparation after receiving the control information from, it is determined that there is no need to switch to the second mode, the first mode is continued and the other control station Receive control information. Thereafter, the mode is switched to the second mode. When such an operation is performed, the reception preparation period devoted to receiving both control information: Ta is less than 12 slots, and the total waiting time compared to the case where the first mode and the second mode are repeatedly operated. The operation time in the second mode in which the power consumption is small is increased, and the current consumption during standby can be reduced.

  Hereinafter, a specific configuration will be described.

  FIG. 9 shows a hardware configuration for realizing the intercom base unit 102b which is a sub control station. The demultiplexing circuit 820 separates and superimposes the video signal of the visitor received from the entrance cordless handset 102a, the conversation voice signal with the visitor through the entrance cordless handset 102a, and the notification signal of the visitor received from the entrance cordless handset 102a. It is composed of a transistor or the like as an electrical interface.

  The hardware configuration corresponding to the demultiplexing circuit 820 includes a door phone interface 1001, and a video signal that is output from the door phone interface 1001 and converted between the video signal between the door phone 102a and the door phone parent device 102b to an analog video signal used in the subsequent stage. Demodulation IC 1002, video capture IC 1003 that converts an analog signal of the video demodulation IC into a digital video signal, SDRAM 1006 that stores the digital video signal, V850 CPU 1005 that is a CPU that manages recording and reproduction of the digital video signal, and V850 CPU 1005 A FRAS ROM 1007 storing a program and a memory SRAM 1008 used when the V850 CPU 1005 program operates.

  In addition, in order to have a conversation between the visitor of the entrance cordless handset 102a and the user of the door phone master set 102b, the conversion of the 2-wire signal and the 4-wire signal between the entrance cordless handset 102a side is 2-4 conversion. This is done by the circuit 1009. A signal between the 2-4 conversion circuit 1009 and the voice switch IC 1009 and the baseband IC 1011 for wireless communication constituting the audio circuit 206 of the door phone base unit 102b is a four-wire analog signal.

  The call unit 807 includes a microphone 1015 and a speaker 1016. The voice uttered on the master side is output from the microphone 1015 to the voice switch 1009. The voice uttered by the entrance cordless handset 102a is amplified by the speaker amplifier circuit 1010 from the voice switch 1009 and reproduced by the speaker 1016. A voice switch 1009 constituting a part of the audio circuit 806 is mounted to compare the volume from the microphone with the volume to the speaker and switch between transmission and reception.

  The main CPU 1017 that combines the control unit 814 and the call detection unit 804 detects that a signal has been input from the entrance cordless handset 102a. When the main CPU 1017 detects a call, the notification unit 805 blinks the LED 1017 to notify the visit. In response to this, when the key matrix switch 1018 corresponding to the response button 808 is pressed on the parent device side, the main CPU 1017 detects this and controls the whole so that a voice call can be made.

  When an analog image signal is input from the entrance cordless handset 102a to the video capture IC 1003, the video capture IC 1003 uses the SRAM 1006 to convert the analog image signal into a digital image signal.

  Further, the V850 CPU 1005 realizes functions such as recording a digital image signal and adding time information to the digital image signal using time information of the clock timer 1004. This is realized by the V850 CPU 1005 executing the program stored in the FLASH ROM 1007 using the SRAM 1008.

  The signal generated by the V850 CPU 1005 is output to the baseband IC 1011 for output to the telephone door phone linkage slave unit 103b.

  In addition, an image of a visitor from the entrance cordless handset 102a is displayed on the LCD panel 1020 using an LCD driver IC 1019 as the monitor circuit 801.

  The baseband IC 1011 includes a part of the control unit 814, a frame processing unit 809, and a part of the audio circuit 806. The baseband IC 1011 adds a synchronization signal necessary for TDMA-TDD communication and an error detection code for error detection to audio information, image information, control signals, etc., and transmits transmission data in accordance with TDMA frames and time slots. Generates a sequence, performs error detection processing from the received data sequence received in accordance with the TDMA frame and time slot, and outputs the voice information and control signal received in the time slot without error .

  The FLASH ROM 1012 implements storage of a program executed by the baseband IC 1011 and a hopping pattern storage unit 812.

  Further, the SRAM 1013 realizes a memory used when the baseband IC 1011 executes a program and an image information storage unit 803 realized in the memory. In addition, in wireless communication between the master unit and the extension master unit, ID information for the extension master unit to identify the master unit is stored in the EEPROM 1014.

  As a wireless unit (301, 302), a wireless IC 1015 that performs transmission / reception of TDMA wireless using frequency hopping that modulates / amplifies an input data sequence, amplifies and demodulates a received wireless signal, and outputs received data This is realized by a switch 1016 for switching a plurality of antennas.

  FIG. 10 shows a hardware configuration that implements the telephone door phone cooperative slave unit 103b. The control unit 911 includes a baseband IC 1101, a flash ROM 1102, an SRAM 1103, an EEPROM 1104, and an LCD power control circuit 1105.

  The baseband IC 1101 controls the telephone doorphone linkage slave unit 103b using a flash ROM 1102 that stores a program executed by the baseband IC 1101 and an SRAM 1003 that is a memory used when the baseband IC 1101 executes the program. The EEPROM 1014 stores ID information for the door phone master unit 102b to identify the telephone door phone link slave unit 103b in the wireless communication between the door phone master unit 102b and the telephone door phone link slave unit 103b.

  The baseband IC 1101 has a frame processing unit 906 and a part of the audio circuit 902 used for wireless transmission / reception. This voice circuit 902 makes it possible to make a call with the entrance cordless handset 102a or the door phone master set 102b.

  The flash ROM 1102 stores a program executed by the baseband IC 1101 and a hopping pattern used in wireless communication, and a hopping pattern storage unit 909 is also mounted.

  The LCD power control circuit 1105 controls the power of the LDC driver IC 1106 based on the control of the baseband IC 1101.

  An LCD driver IC 1106 is mounted as the monitor circuit 904, and an LCD panel 1107 is mounted as the monitor device. As the notification unit 901, an LED 1108 for displaying an incoming call from the door phone base unit 102b is mounted. In addition, a key matrix 1109 is mounted as a response button 910 for a user to respond to an incoming call from the intercom base unit 102b.

  A call unit 903 used when a user makes a call with the entrance cordless handset 102a through the door phone base unit 102b is provided with a microphone 1110 and a speaker 1111. In addition, a speaker amplifier circuit 1112 is mounted as a part of the audio circuit 902 in order to perform power amplification for sounding the speaker 1111.

  A wireless IC 1113 is mounted as a wireless unit (201, 202) for transmitting and receiving wireless signals. Here, an antenna changeover switch 1114 is used to perform transmission / reception using a plurality of antennas.

  The doorphone base unit 102b includes a charge control circuit 1116 including a battery and a power supply / reset circuit 1118 for controlling the power supply and reset of the baseband IC 1101 as a power supply for operating the charge control circuit 1116 including the battery and the LCD panel 1107. Implemented. In addition, a charging terminal 1115 is mounted to charge the battery of the door phone base unit 102b.

  FIG. 11 is an external view of the entrance cordless handset 102a. On the front of the entrance cordless handset, there are a camera 1201 that uses the visitor as an image signal, a microphone 1202 that communicates with the visitor, a speaker 1203, and a call button that conveys the visit to the doorphone master unit 102b and the telephone doorphone linkage cordless handset 103b. 1204 is arranged.

  FIG. 12 is an external view of the door phone base unit 102b. An LCD panel 1020 and a key matrix switch 1018 for displaying an image of a visitor of the entrance cordless handset 102a and an LED 1017 for displaying the visit by light are arranged on the front face of the door phone main unit 102b. In addition, a microphone 1015 and a speaker 1016 are provided for making a call with a visitor of the entrance cordless handset 102a.

  FIG. 13 is an external view of the telephone door phone cooperative slave unit 103b. The telephone door phone cooperative slave unit 103b is portable. On the front face of the telephone door phone cooperative handset 103b, there are an LCD panel 1107 and a key matrix switch 1109 for displaying an image of a visitor of the entrance handset 102a, and an LED 1108 for displaying the visit with light. In addition, a microphone 1110 for making a call with a visitor of the entrance cordless handset 102a and a speaker 1111 on the back side of the telephone door phone linked handset 103b are provided.

  With this configuration, a visitor can talk with a user in the room by using the entrance cordless handset 102a. Here, the image of the entrance cordless handset is sent to the telephone doorphone linkage cordless handset 103b via the doorphone master phone 102b having the doorphone interface 1001, and the LCD panel 1107 of the phone doorphone linkage cordless handset 103b carried by the user in the room. The image of the entrance unit is also projected on the top, allowing you to talk while watching the visitors. In addition, a user in the room can talk while moving with the telephone doorphone linkage slave unit 103b. Further, at the time of standby, the telephone door phone linkage slave unit 103b can be placed in a convenient place.

  Further, since the telephone door phone link slave 103b is also wirelessly connected to the cordless telephone master 103a, it is possible to make an external line call via a telephone line.

  The present invention has an advantage that when a cordless telephone and a cordless door phone monitor are linked, a cordless slave unit can be provided which can suppress standby power consumption related to radio.

The block diagram of the radio | wireless communications system which concerns on Embodiment 1 of this invention Block diagram of the telephone door phone cooperation cordless handset according to Embodiment 1 of the present invention Block diagram of door phone master unit according to Embodiment 1 of the present invention Slot explanatory diagram of control channel transmission / reception according to Embodiment 1 of the present invention Slot explanatory diagram of control channel transmission / reception when an incoming call occurs in Embodiment 1 of the present invention Slot explanatory diagram of control channel transmission / reception when an incoming call occurs in Embodiment 1 of the present invention The figure which shows the structure provided with the cordless telephone device and the door phone device Explanatory drawing of the transmission / reception slot of the cordless phone unit and door phone unit The figure which shows the hardware constitutions of the doorphone main | base station of the radio | wireless communications system which concerns on embodiment of this invention The figure which shows the hardware constitutions of the cordless telephone cordless handset of the radio | wireless communications system which concerns on embodiment of this invention FIG. 1 is an external view of an entrance terminal of a wireless communication system according to an embodiment of the present invention 1 is an external view of a door phone master unit of a wireless communication system according to an embodiment of the present invention. External view of cordless telephone cordless handset of wireless communication system according to an embodiment of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Wireless communication system 102 Door phone apparatus 102a Entrance child machine 102b Door phone parent machine 103 Cordless telephone apparatus 103a Cordless telephone parent machine 103b Telephone door phone cooperation child machine 201 Wireless reception part 202 Wireless transmission part 203 Reception control channel control part 204 Reception control channel management part 205 control unit 206 communication channel control unit 207 audio processing unit 208 speaker / microphone unit 301 wireless reception unit 302 wireless transmission unit 303 control channel timing detection unit 304 control channel transmission control unit 305 control channel management unit 306 control unit 307 entrance slave unit interface Part 600 Cordless phone device 600a Cordless phone master device 600b Cordless phone slave device 601 Door phone device with camera 601a Entrance slave device 601b Door phone master device 601c Honmonitako machine

Claims (7)

A master control station and one or more sub-control stations synchronized with the main control station; and a slave station synchronized with the master control station and the one or more sub-control stations. In a wireless communication system for receiving control information transmitted from a station and the one or more sub-control stations,
The sub control station has the same means for detecting the timing at which the main control station transmits control information, and the transmission timing at which the sub control station transmits control information is the same as the frame at which the main control station transmits control information. Means for setting in the frame;
From the first period during which the slave station can receive both the control information from the main control station and the control information from the sub control station within a unit frame time, and from the second period during which reception is stopped over a plurality of frames A wireless communication system comprising intermittent reception processing means for performing intermittent reception processing. 2. The sub control station according to claim 1, wherein the sub control station selects a slot adjacent to the control channel slot in which the main control station transmits control information as a control channel slot in which the sub control station transmits control information. The wireless communication system according to 1. 2. The wireless station according to claim 1, wherein, even when communication with one control station is started, control information of another synchronized control station is intermittently received. Communications system. The control information transmitted by the master control station and the master control station includes incoming information for notifying the slave station of the occurrence of an incoming event,
2. The radio according to claim 1, wherein when there is incoming call information in the main control station or the control information from the main control station received in the first period, switching from intermittent reception to continuous reception is performed. Communications system. A master control station and one or more sub-control stations synchronized with the main control station; and a slave station synchronized with the master control station and the one or more sub-control stations. In a wireless communication system receiving control information of a station and the one or more sub-control stations,
The sub-control station has means for detecting the timing at which the main control station is transmitting incoming information, which is a type of control information transmitted by the main control station, and is generated at a timing independent of the main control station. Means for setting the control information transmission timing for notifying the slave station of the occurrence of an incoming event at the station in the same frame as the incoming information transmitted by the main control station,
The slave station has intermittent reception processing means for performing intermittent reception processing during standby,
In the intermittent reception process, if control information of the main control station and the sub control station is received within a unit frame time and the control information is received, the control information does not include incoming call information. A wireless communication system, wherein reception is stopped over a plurality of frames until control information is sent to the terminal. A wireless communication system comprising a plurality of control stations and a slave station that receives control information including incoming information transmitted at a predetermined timing from the control station, and a slave station that starts communication with the control station,
The slave station is
A wireless unit for communicating with the control station;
A first mode that prepares to receive the incoming information, activates the radio unit, and analyzes the received data; and a second mode that operates the radio unit in a stopped state with low power consumption. A control unit that performs control so as to shift from the first mode to the second mode when the time until reception of the next incoming information after receiving the information is longer than the reception preparation time of the first mode;
The control station
Control including incoming information so that the time from transmission of control information including incoming information transmitted by another control station to transmission of control information including incoming information transmitted by the local station is shorter than the length of reception preparation time of the slave station. A wireless communication system comprising a control unit that operates to determine a transmission timing of information. In synchronization with the main control station that transmits control information in the same frame and one or more sub-control stations, and having means for receiving control information sent from the main control station and the sub-control station,
Performs intermittent reception processing consisting of a first period during which both control information from the main control station and control information from the sub control station can be received within a unit frame time, and a second period during which reception is stopped over a plurality of frames. A wireless communication apparatus comprising discontinuous reception processing means.

Images