JP2007208609A - Wireless communications device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless communications device, capable of suppressing power consumption during waiting even in a bad wireless environment and prolonging the time duration in battery drive to improve convenience, when communicating as a slave station, synchronized with a main control station and as a sub control station. <P>SOLUTION: A telephone-intercom linked slave unit receives a control channel of a cordless telephone master unit and an intercom master unit. Both master units are a control station. If the slave unit succeeds reception of the control channel from one of the master units, the slave unit stops the reception of the control channel from the following frame, and performs intermittent reception processing. According to the configuration, intermittent reception processing is performed, when reception of one of control channels is successful even in waiting state for two control stations. Consequently, power consumption of the slave unit can be reduced. <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.

  In general homes, a wireless communication system 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 has become widespread. FIG. 10 is a diagram illustrating a configuration including a cordless telephone device and a door phone device. In this example, an example of one control station and a plurality of slave stations will be described. As shown in FIG. 10, 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 room or bedroom on the second floor, so that it is not necessary to go to the cordless telephone master phone 600a every time an incoming call is made. 10, 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 doorphone devices with cameras 601 include a doorphone monitor slave unit that communicates wirelessly with the doorphone master unit 601b. In this case, the doorphone master unit 601b is used as a control station, and the doorphone monitor slave unit is used as a slave station for wireless communication (not shown in FIG. 10). This doorphone monitor slave unit is used when a visitor presses a ringing button. The video of the visitor connected wirelessly from the doorphone master unit 601b and captured by the camera is transmitted to the doorphone monitor slave unit, and a call with the visitor at the entrance can be made by the response button.

  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 by a plurality of wireless devices, it is difficult to manage these slave units. Therefore, the cordless telephone device 600 and the door phone device 601 with camera are shared and developed.

  The cordless phone and the camera-equipped doorphone monitor cordless handset are called telephone doorphone linkage cordless handsets, and receive and respond to incoming calls from cordless phone master phone 600a and doorphone master phone 601b. Can do.

  FIG. 11 is a diagram showing a state when this telephone doorphone cooperation slave unit communicates with the doorphone master unit 601b and the cordless telephone master unit 600a by TDMA. As shown in the TDMA slot configuration of FIG. 11, the telephone doorphone cooperation slave unit is synchronized with the cordless telephone master unit 600a and the doorphone master unit 601b, and receives control information of each master unit. At this time, the cordless telephone master device 600a that is the main control station is synchronized with the doorphone master device 601b that is the sub-control station.

The door phone master unit 601b and the telephone door phone cooperation slave unit receive the control information transmitted from the cordless phone master unit 600a in the slot 1 and are synchronized. Furthermore, the telephone door phone cooperative slave unit receives the control information transmitted by the door phone master unit 601b. With this slot configuration, the telephone intercom cooperation handset can receive control information from the cordless telephone base unit 600a and the doorphone base unit 601b, and can receive calls from either.

In addition, the telephone intercom-linked slave unit receives control information at a certain interval without receiving all the control information transmitted by the master unit so that the power consumption is reduced during standby because the battery is driven. Intermittent reception processing is performed. In other words, a telephone intercom-linked handset that receives a single piece of control information performs intermittent reception processing that stops receiving control information for a certain period of time after receiving control information normally during standby, thereby reducing power consumption during standby. ing.
Japanese Patent Laid-Open No. 7-87556

  However, if control information reception fails as shown in FIG. 12 (S801), the control information is continuously received (S802), and a continuous reception state occurs. On the contrary, in a place where the wireless environment is bad, power consumption increases. To do. In addition, if the telephone door phone cooperation slave unit normally receives both control information of the main control station and the sub control station and performs intermittent reception processing, the power consumption further increases.

  Therefore, an object of the present invention is to reduce the power consumption during standby in a place where the wireless environment is bad and to increase the battery drive time when communicating synchronously as a slave station of the control station and the sub-control station. A wireless communication device capable of improving the performance is provided.

  A wireless communication device according to the present invention is a standby wireless communication device that receives control information from a main control station and one or more sub-control stations synchronized with the main control station and synchronizes with each other as a slave station. And intermittent reception processing means for stopping reception of control information for a predetermined time; and means for stopping reception of the control information after normally receiving control information of one of the main control station and the sub control station It is characterized by having.

  In the present invention, if control information of either the main control station or the sub-control station is normally received, control information reception can be stopped and intermittent reception processing can be performed. In addition, power consumption during standby can be reduced. Therefore, since the battery-driven time can be extended, a highly convenient wireless communication device can be obtained.

  A first invention of the present application is a wireless communication apparatus that receives control information from a main control station and one or more sub-control stations synchronized with the main control station and synchronizes with each other as a slave station. Intermittent reception processing means for stopping reception of control information for a certain period of time, and means for stopping reception of control information after normally receiving control information of one of the main control station and the sub control station It is characterized by that.

  The wireless communication apparatus of the present invention that communicates as a slave station that synchronizes with a plurality of control stations of the main control station and one or more sub-control stations has the advantage that power consumption can be reduced without losing synchronization.

  The second invention of the present application is characterized by comprising means for determining a length of time for stopping reception of control information depending on whether call control information from the main control station or sub-control station has been normally received. Is.

  This has the advantage that the delay of the call from the main control station or the sub control station can be minimized.

  The third invention of the present application performs communication in a time division multiplexing system, receives control information transmitted from a plurality of control stations synchronized with time division multiplexing, and performs time division multiplexing in synchronization with the plurality of control stations. Is a wireless communication apparatus that maintains the synchronization between the first reception state in which reception operation is performed at all timings at which the control station transmits control information and the timing at which the control station transmits control information. A second reception state in which a reception operation is performed only at the information transmission timing, and when the control information transmitted from a plurality of control stations is correctly received at least once within a predetermined time, the second reception state When the control information transmitted from the plurality of control stations cannot be correctly received within a predetermined time, a function of receiving in the first reception state is provided.

  Even without receiving control information of all synchronized control stations, there is an advantage that power consumption can be reduced without removing the synchronization.

(Embodiment)
Hereinafter, embodiments of the present invention will be described with reference to FIGS. First, the radio | wireless communications system which concerns on embodiment of this invention is demonstrated based on FIG. FIG. 1 is a configuration diagram of a radio communication system according to an embodiment 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 includes a cordless telephone master unit 103a and a telephone door phone cooperative slave unit 103b. The telephone doorphone linkage slave unit 103b is also a cordless phone slave unit and a door phone slave unit, and can receive calls from either the doorphone master unit 102b or the cordless phone master unit 103a. In FIG. 1, only one telephone doorphone cooperative handset 103 b is shown, but a plurality of telephone doorphone cooperation handsets 103 b may be used.

  In the wireless communication system 101 according to the present embodiment, the cordless telephone base unit 103a is the main control station, the doorphone base unit 102b is the sub-control station, and the telephone doorphone cooperative handset 103b is the slave station, and communication is performed by wireless TDMA. 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 doorphone linkage slave unit 103b synchronizes with either the cordless telephone master unit 103a or the doorphone master unit 102b, so that both master units can synchronize at the frame timing and receive both control channels. be able to.

  Next, the entrance cordless handset 102a will be described with reference to FIG. FIG. 2 is an external view of the entrance cordless handset 102a. On the front surface of the entrance cordless handset 102a, a camera 1201 for imaging a visitor, a microphone 1202 for making a call with the visitor, a speaker 1203, and a visitor visit the doorphone master phone 102b and the cordless phone master phone 103a. A call button 1204 to inform is arranged.

  Next, the doorphone master unit 102b will be described with reference to FIG. FIG. 3 is an external view of the door phone master unit 102b. An LCD panel 1020 and an answer button 1018 for displaying an image of a visitor of the entrance cordless handset 102a are arranged on the front face of the intercom base phone 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.

  Next, the cordless telephone base unit 103a will be described with reference to FIG. FIG. 4 is an external view of the cordless telephone base unit 103a. A handset 1103 is connected to the main body 1101 through a curl cord 1102. The main unit main body 1101 is provided with operation buttons 1104 and a display panel 1105.

  Next, the telephone door phone cooperative slave unit 103b will be described with reference to FIG. FIG. 5 is an external view of the telephone door phone cooperative slave unit 103b. On the front face of the telephone door phone cooperative slave unit 103b, there are an LCD panel 1107 for displaying an image of a visitor of the entrance slave unit 102a and a response button 1109. In addition, it has a microphone 1110 for making a call with a visitor of the entrance cordless handset 102a, and a speaker 1111 on the back of the telephone door phone linked handset 103b.

  Here, the telephone door phone cooperation cordless handset which is an example of the radio | wireless communication apparatus which concerns on embodiment of this invention is demonstrated in detail based on FIG. FIG. 6 is a block diagram of the telephone door phone cooperative slave unit according to the embodiment of the present invention. The telephone door phone cooperation cordless handset 103b includes a wireless reception unit 201, a wireless transmission unit 202, a reception control channel control unit 203, a reception control channel management unit 204, a call control unit 205, and a communication channel control unit 206. ing.

  The wireless reception unit 201 demodulates a TDMA reception signal received from the antenna. The wireless transmission unit 202 modulates and transmits transmission data by TDMA wireless from the antenna. The reception control channel control unit 203 receives and processes the control channel data received by the wireless reception unit 201. The reception control channel management unit 204 manages from which parent device the reception control channel receives the control channel, and the slot and reception frequency. The call control unit 205 controls voice and data communication calls and incoming calls when responding to an incoming call from the doorphone base unit 102b or the cordless telephone base unit 103a. The communication channel control unit 206 controls a frequency channel transmitted / received by TDMA communication.

  The telephone intercom linking handset 103b determines whether the control channel is received by the doorphone base station 102b or the cordless telephone base station 103a, and performs a control channel reception stop process for a certain period of time to reduce power consumption. Is going. This is because when the wireless reception unit 201 normally receives the control information, information that has been normally received is transmitted from the wireless reception unit 201 to the reception control channel control unit 203, and the reception control channel control unit 203 receives the wireless information from the information. By canceling the reception setting of the control channel of the receiving unit 201 and setting the time for stopping the reception of the control channel, the reception of the control information is stopped for a certain time to reduce power consumption. That is, the wireless reception unit 201, the reception control channel control unit 203, and the reception control channel management unit 204 function as intermittent reception processing means.

  The reception stop time of the control channel is determined by the reception control channel management unit 204 by determining the reception status of the control channel of the doorphone master unit 102b or the cordless telephone master unit 103a. That is, the reception control channel management unit 204 includes means for stopping reception of control information after successfully receiving control information of one of the main control station and the sub control station, and the main control station and sub control station. This corresponds to means for determining the length of time to stop receiving control information depending on whether or not the call control information is normally received.

  Next, the operation of the radio communication system according to the embodiment of the present invention will be described with reference to FIGS. FIG. 7 is a diagram illustrating control channel reception slots in the normal system in the radio communication system according to the embodiment of the present invention. FIG. 8 is an explanatory diagram of a slot in the case where reception of a control signal from the cordless telephone base unit fails in the wireless communication system according to the embodiment of the present invention. FIG. 9 is an explanatory diagram of a slot when reception of control signals of both the cordless telephone base unit and the door phone base unit fails in the wireless communication system according to the embodiment of the present invention.

  First, the case where the door phone apparatus 102 and the cordless telephone apparatus 103 are communicating in a favorable wireless environment will be described with reference to FIG.

  As shown in FIG. 7, the cordless telephone base unit 103 a transmits a control channel in the slot 1. The intercom base unit 102b transmits the control channel in the slot 6, and receives the control channel of the cordless telephone base unit 103a in the slot 1, and is synchronized with the cordless telephone base unit 103a. The telephone doorphone-linked handset 103b can receive the control channels of both the cordless telephone base unit 103a and the doorphone base unit 102b.

  The telephone intercom linking handset 103b performs an intermittent reception process for stopping the reception of the control channel for a certain time in order to reduce power consumption during standby. The cordless telephone base unit 103a and the door phone base unit 102b transmit a control signal including call control information once in 16 frames, and the telephone door phone cooperative handset 103b receives the call control information during intermittent reception. For this reason, at the timing of frame number 16n (hereinafter, n is a natural number), control channel reception is performed without stopping control channel reception (S301).

  When both the cordless telephone base unit 103a and the doorphone base unit 102b normally receive the control signal of the call control information, reception of the control channel is stopped from the next frame (S302).

  The next reception is performed with frame number 16 (n + 4). Therefore, in the case of using the TDMA system of 10 ms per frame, the time until the reception of the control signal including the next call control information is 640 ms. Although a delay of up to 0.6 seconds occurs after the call control information is transmitted from each of the cordless telephone base unit 103a or the door phone base unit 102b, there is no problem in operation.

  Next, when the door intercom device 102b and the cordless telephone device 103 are communicating in a poor wireless environment, the telephone door phone linkage slave device 103b fails to receive a control signal from the cordless phone master device 103a. Will be described with reference to FIG.

  When the telephone intercom linking handset 103b has successfully received the control signal from the cordless telephone base unit 103a (S401) and failed to receive the control signal from the doorphone base unit 102b (S402), the control channel reception from the next frame is received. Stops. This is because if one of the control channels has been successfully received, synchronization can be maintained, so that reception of the control channel can be stopped from the next frame (S403). However, since reception of the call control information control signal from the doorphone master unit 102b has failed, the cordless telephone master unit 103a or each base unit of the doorphone master unit 102b transmits frame number 16 ( Reception of the control channel is stopped until the frame of (n + 1) (S404).

  Next, when the door phone device 102 and the cordless telephone device 103 are communicating in a poor wireless environment, the telephone door phone is linked to receive control signals from both the cordless telephone master device 103a and the door phone parent device 102b. A case where the slave has failed will be described with reference to FIG.

Since the wireless environment is poor, the telephone doorphone linkage slave unit 103b has failed to receive control signals from both base units (cordless phone base unit 103a and doorphone base unit 102b) at frame number 16n (S501). In this case, since synchronization may not be maintained, the control channel is received in the next frame. If reception of the control channel of either parent device is successful in the next frame, reception of the control channel is stopped from the next frame (S502).
Since reception of the control signal for the call control information has failed, reception is stopped until the master unit receives the control channel in the frame of frame number 16 (n + 1) for transmitting the next call control information (S503).

  In the intermittent reception process of the telephone doorphone linked slave unit 103b described in the above embodiment, if the wireless environment is good and there are few failures in receiving control channels from the two master units, the telephone doorphone linked slave unit 103b is long. Intermittent reception processing for stopping reception of the control channel over time can be performed. Further, if the control channel of either of the two master units can be received, the telephone intercom-linked slave unit 103b is set to the intermittent reception process at short intervals, so that the slave unit is only a standby unit of one of the master units. Will be in a continuous reception state until the reception of the control channel of one master unit succeeds, but if the telephone intercom-linked handset 103b waiting for the two master units can receive either control channel, Since intermittent reception processing is performed even in a short time, power consumption can be reduced.

  The present invention has an advantage that a cordless cordless handset that further reduces power consumption can be provided by linking a cordless telephone and a cordless door phone monitor.

Configuration diagram of radio communication system according to an embodiment of the present invention Exterior view of entrance cordless handset External view of door phone master unit External view of cordless phone base unit External view of a telephone doorphone-linked handset Block diagram of a telephone door phone cooperation cordless handset according to an embodiment of the present invention The figure explaining the slot of control channel reception in the normal system which concerns on embodiment of this invention Slot explanatory diagram when reception of a control signal from a cordless telephone base unit fails in the wireless communication system according to the embodiment of the present invention Slot explanatory diagram when reception of control signals of both the cordless telephone base unit and the doorphone base unit fails in the wireless communication system according to the embodiment of the present invention The figure which shows the structure provided with the cordless telephone apparatus and the door phone apparatus The figure which shows a state when the telephone door phone cooperation cordless handset communicates with the door phone master phone and the cordless master phone by TDMA. The figure explaining the transmission / reception slot at the time of the telephone door phone cooperation cordless handset intermittent reception

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 Wireless communication system 102 Door phone apparatus 102a Entrance child machine 1201 Camera 1202 Microphone 1203 Speaker 1204 Call button 102b Door phone parent machine 1020 LCD panel 1018 Response button 1015 Microphone 1016 Speaker 103 Cordless telephone apparatus 103a Cordless telephone parent machine 1101 Main machine main body 1102 Carl cord 1103 Handset 1104 Operation Button 1105 Display Panel 103b Telephone Door Phone Linked Slave Unit 1107 LCD Panel 1109 Response Button 1110 Microphone 1111 Speaker 201 Radio Reception Unit 202 Radio Transmission Unit 203 Reception Control Channel Control Unit 204 Reception Control Channel Management Unit 205 Call Control Unit 206 Communication Channel control unit 600 Cordless telephone device 600a Cordless telephone master unit 600b Cordless telephone cordless handset 601 Door phone device with camera 601a Entrance cordless handset 601b Door phone master phone

Claims (3)

In a wireless communication device that receives control information from a master control station and one or more sub-control stations that are synchronized with the master control station and synchronizes as slave stations,
Intermittent reception processing means for stopping reception of control information for a predetermined time during standby, and receiving control information after successfully receiving control information of one of the main control station and the sub control station And a means for stopping. 2. The apparatus according to claim 1, further comprising means for determining a time length for stopping reception of the control information depending on whether call control information from the main control station or the sub control station is normally received. Wireless communication device. Wireless communication that communicates in time division multiplexing, receives control information transmitted from a plurality of control stations synchronized in time division multiplexing, and maintains synchronization in time division multiplexing in synchronization with the plurality of control stations A device,
The reception operation is performed only at the control information transmission timing determined in advance among the first reception state in which the control station performs the reception operation at all timings at which the control information is transmitted and the timing at which the control station transmits control information A second reception state;
When control information transmitted from the plurality of control stations has been correctly received at least once within a predetermined time, received in the second reception state,
A wireless communication apparatus, comprising: a function of receiving in the first reception state when control information transmitted from the plurality of control stations cannot be correctly received within a predetermined time.

Images